Chemical and Biochemical EngineeringWestern Engineering

Publications

Patent

  1. European patent titled “A photocatalytic reactor suitable for water purification as well as a process for the purification of waste water by means of such a photocatalytic reactor”, jointly with A. A. C. M. Beenackers, European Patent Number: 96200942.9-2104, 1996.

Text Book

  1. Ray, Ajay K. and Gupta, S. K., “Mathematical Methods in Chemical and Environmental Engineering”,
    3rd Edition Revised, 689 pages, International Thomson Learning, 2009.

Book Chapters

  1. Ivanov, S., Ray, Ajay K., “Application of Multi-objective Optimization in the Design and Operation of Industrial Catalytic Reactors and Processes”. Edited by B. Saha, Catalytic Reactors. : 1-25. Walter de Grutyter, GmbH, Berlin, Germany, 2015 (In Press).

  2. Chowdhury, Pankaj., Elkamel, Ali., Ray, Ajay K., “Photocatalytic Processes for the Removal of Toxic Metal Ions”, in Heavy Metals in Water: Presence, Removal and Safety, 25-43, Edited by S.K. Sharma, ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, CAMBRIDGE CB4 4WF, CAMBS, UK, 2015.

  3. Chowdhury, P., Gomaa, H., Ray, Ajay K., “Dye-Sensitized Photocatalyst: A Breakthrough in Green Energy and Environmental Detoxification”, in Sustainable Nanotechnology and The Environment: Advances And Achievements, Edited by N, Shamin and V. K. Sharma, Vol 1124, 231-266. ACS Symposium Series, 2013.

  4. Ray, Ajay K., "Photocatalytic Reactor Configurations for Water Purification: Experimentation and Modeling", in Advances in Chemical Engineering Photocatalytic Technologies, Edited by H. Lasa and B.S. Rosales, Vol 36, 145-184, Elsevier Science, 2009. 

  5. Ray, Ajay K., “Applications of Multi-objective Optimization in the Design of Industrial Catalytic Reactors”, in Recent developments in heterogeneous catalytic processes, Edited by B. Saha, Elsevier Science, 2008. 

  6. Oh, P. P., Rangaiah, G. P. and Ray, Ajay K., "Optimal design and operation of an industrial hydrogen plant for multiple objectives", in Recent Developments in Optimization and Optimal Control in Chemical Engineering, Edited by Rein Luus, Transworld Research Network, 289-306, 2002. 

  7. Ray, Ajay K., "Design and Development of two large-scale photocatalytic reactors for treatment of toxic organic chemicals in wastewater", in Reaction Engineering in Pollution Prevention, Edited by M. Abraham and R. Hesketh, Chapter 13, 155-171, Elsevier Science, 2000.
          

Publication in Refereed International Journal

  1. Saremirad, P., Wood, J., Zhang, Y., Ray, Ajay K.(2015). “Oxidative protein refolding on size exclusionchromatography: From batch single-column to multi-column counter-currentcontinuous processing”. Chemical Engineering Science.(In Press)

  2. Mitra Ray, N., Ray, Ajay K.(2015). “Modeling, Simulation and Experimental Study of a Simulated Moving Bed Reactor for the Synthesis of Biodiesel”. Canadian Journal of Chemical Engineering. (In Press)

  3. Faraji, N., Zgang, Y., Ray, Ajay K.(2015). “Determination of Adsorption Isotherm Parametersfor Minor Whey Proteins by Gradient Elution Preparative Liquid Chromatography”. Journal of Chromatography A. (In Press)

  4. Isimjan, T. T., Trifkovic, M., Abdullahi, I., Rohani, S., Ray, Ajay K.(2015). “Nanoscale Optimization and Statistical Modeling of Photoelectrochemical Water Splitting Efficiency of N-Doped TiO2 Nanotubes”. TOPICS IN CATALYSIS. 58(2-3): 114-122.

  5. Chowdhury, P., Gomaa, H., Ray, Ajay K.(2015). “Sacrificial hydrogen generation from aqueous triethanolamine with Eosin Y-sensitized Pt/TiO2 photocatalyst in UV, visible and solar light irradiation”. Chemosphere. 121: 54-61.

  6. Crapulli, F., Santoro, D., Sasges, M. R., Ray, S., Mahmoud, H., Ray, Ajay K.(2015). “Quantifying ultraviolet inactivation kinetics in nearly opaque fluids”. WATER QUALITY RESEARCH JOURNAL OF CANADA. 50(1): 34-46.

  7. Hashim, N., Natarajan, P., Ray, Ajay K.(2014). “Intrinsic Kinetic Study for Photocatalytic Degradation of Diclofenac under UV and Visible Light”. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 53(49): 18637-18646.

  8. Malekshoar, G., Pal, K., He, Q., Yu, A. P., Ray, Ajay K.(2014). “Enhanced Solar Photocatalytic Degradation of Phenol with Coupled Graphene-Based Titanium Dioxide and Zinc Oxide”. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 53(49): 18824-18832.

  9. Saremirad, P., Wood, J. A., Zhang, Y., Ray, Ajay K.(2014). “Oxidative protein refolding on size exclusion chromatography at high loading concentrations: Fundamental studies and mathematical modeling”. JOURNAL OF CHROMATOGRAPHY A. 1370: 147-155.

  10. Crapulli, F., Santoro, D., Sasges, M., Ray, Ajay K.(2014). “Mechanistic modeling of vacuum UV advanced oxidation process in an annular photoreactor”. Water research. 64: 209-225.

  11. Gandhi, R., Sharma, V. K., Nakhla, G., Ray, Ajay K.(2014). “Treatment of Combined Sewer Overflows Using Ferrate (VI)”. WATER ENVIRONMENT RESEARCH. 86(11): 2202-2211.

  12. Ivanov, S. Y., Ray, Ajay K.(2014). “Multiobjective optimization of industrial petroleum processing units using Genetic algorithms”. Procedia Chemistry. 10: 7-14.

  13. Mukherjee, D., Barghi, S., Ray, Ajay K. (2014). “Degradation of Methyl Orange by TiO2/Polymeric Film Photocatalyst”. CANADIAN JOURNAL OF CHEMICAL ENGINEERING. 92(9): 1661-1666.

  14. Saremirad, P., Wod, J. A., Zhang, Y., Ray, Ajay K. (2014). “Multi-variable operational characteristic studies of on-column oxidative protein refolding at high loading concentrations”. Journal of chromatography. A. 1359: 70-75.

  15. Mao, S., Zhang, Y., Rohani, S., Ray, Ajay K.(2014). “Enantioseparation of racemic mandelic acid by simulated moving bed chromatography using Chiralcel-OD column”. CANADIAN JOURNAL OF CHEMICAL ENGINEERING. 92(7): 1283-1292.

  16. Mukherjee, D., Barghi, S., Ray, Ajay K.(2014). “Preparation and Characterization of the TiO2Immobilized Polymeric Photocatalyst for Degradation of Aspirin under UV andSolar Light”. Processes. 2(1): 12-23.

  17. Gilmore, C. R., Ray, Ajay K., Zhu, J., Ray, M. B.(2013). “Photocatalytic Performance of Titanium Dioxide Thin Films from Polymer-Encapsulated Titania”. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 52(50): 17800-17811.

  18. Xu, J., Liu, Y. M., Xu, G. Q., Yu, W., Ray, A. K.(2013). “Analysis of a Non-isothermal Simulate Moving-Bed Reactor”. AICHE JOURNAL. 59(12): 4705-4714.

  19. Li, D. B., Ray, M. B., Ray, Ajay K., Zhu, J.X.(2013). “A comparative study on hydrodynamics of circulating fluidized bed riser and downer”. POWDER TECHNOLOGY. 247: 235-259.

  20. Li, D B., Ray, Ajay K., Ray, M. B., Zhu, J.(2013). “Catalytic reaction in a circulating fluidized bed riser: Ozone decomposition”. POWDER TECHNOLOGY. 242: 65-73.

  21. Chowdhury, P., Malekshoar, G., Ray, M. B., Zhu, J., Ray, Ajay K.(2013). “Sacrificial Hydrogen Generation from Formaldehyde with Pt/TiO2 Photocatalyst in Solar Radiation”. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 52(14): 5023-5029.

  22. Xu, J., Zhu, L., Xu, G. Q., Yu, W., Ray, Ajay K.(2013). “Determination of competitive adsorption isotherm of enantiomers on preparative chromatographic columns using inverse method”. JOURNAL OF CHROMATOGRAPHY A. 1273: 59-56.

  23. Kundu, P. K., Ray, Ajay K., Elkamel, A. (2012). “Numerical simulation and optimisation of unconventional three-section simulated countercurrent moving bed chromatographic reactor for oxidative coupling of methane reaction”. CANADIAN JOURNAL OF CHEMICAL ENGINEERING. 90(6): 1502-1513.

  24. Isimjan, T. T., Zhu, Y., Yang, D. Q., Rohani, S., Ray, Ajay K.(2012). “A New Approach of Tailoring Wetting Properties of TiO2 Nanotubular Surfaces”. Advanced Science Letters. 18: 158-163.

  25. Li, D., Ray, Ajay K., Ray, M. B., Zhu, J.(2012). “Rotational asymmetry of reactant concentration and its evolution in a circulating fluidized bed riser”. PARTICUOLOGY. 10(5): 573-581.

  26. Mao, S., Zhang, Y., Rohani, S., Ray, A. K.(2012). “Chromatographic resolution and isotherm determination of (R,S)-mandelic acid on Chiralcel-OD column”. JOURNAL OF SEPARATION SCIENCE. 35(17): 2273-2281.

  27. Eng., Y. Y., Sharma, V. K., Ray, Ajay K.(2012). “Degradation of anionic and cationic surfactants in a monolithic swirl-flow photoreactor”. SEPARATION AND PURIFICATION TECHNOLOGY. 92: 43-49.

  28. Chowdhury, P., Moreira, J., Gomaa, H., Ray, Ajay K.(2012). “Visible-Solar-Light-Driven Photocatalytic Degradation of Phenol with Dye-Sensitized TiO2: Parametric and Kinetic Study”. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 51(12): 4523-4532.

  29. Herrera, J. E., Isimjan, T. T., Abdullahi, I., Rohani, S., Ray, Ajay K.(2012). “A novel nanoengineered VOx catalyst supported on highly ordered TiO2 nanotube arrays for partial oxidation reactions”. APPLIED CATALYSIS A-GENERAL. 417: 13-18.

  30. Isimjan, T. T., Rohani, S., Ray, Ajay K.(2012). “Photoelectrochemical water splitting for hydrogen generation on highly ordered TiO2 nanotubes fabricated by using Ti as cathode”. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. 37(1): 103-108.

  31. Gupta R. K., Jana, S. C., Ray, Ajay K., Santosh K. Gupta: Professor Extraordinaire and Inspiration to Several Generations. POLYMER ENGINEERING AND SCIENCE. 51(10): 1907-1908, 2011. 

  32. Li, D., Ray, Ajay K; Ray, M. B., Zhu, J. "Catalytic reaction in CFB riser: ozone decomposition", Chemical Engineering Science, 2011. (In Press) 

  33. Chowdhury, P., Gomaa, H., Ray, Ajay K, “Factorial design analysis for dye-sensitized hydrogen generation from water”. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. 36(21): 13442-13451, 2011.

  34. Agrawal, N., Rangaiah, G. P., Gupta, S. K. and Ray, Ajay K., “Dynamic Model of an Industrial LDPE Tubular Reactor and its use for Optimal Grade Change for Multiple Criteria”, Industrial and Engineering Chemistry Research, 2011. (In Press)

  35. Isimjan, T.T., Rohani, S., Ray, Ajay K. "An innovative approach to synthesize highly ordered TiO2 nanotubes", Journal of Nanoscience and Nanotechnology, 11(2):1079-1083, 2011. 

  36. Anquandah, G., Ray, M.B., Ray, Ajay K., Al-Abduly, A.J., Sharma, V.K., "Oxidation of X-ray compound ditrizoic acid by ferrate(VI)", Environmental Technology, 32 (3), pp. 261-267, 2011.

  37. Eng, Y. Y., Sharma, V. K., Ray, Ajay K., “Photocatalytic degradation of nonionic surfactant, Brij 35 in aqueous TiO2 suspensions”. CHEMOSPHERE. 79(2): 205-209, 2010.

  38. Briens, C., Charpentier, P., Ray, Ajay K., “Green Process Engineering”, Journal of Policy Engagement. 2(4): 16-19, 2010.

  39. Quddus, M. R., Zhang, Y., Ray, Ajay K., “Multiobjective Optimization of a Porous Ceramic Membrane Reactor for Oxidative Coupling of Methane”. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. 49(14): 6469-6481, 2010.

  40. Zhang, Y., Mao, S., Ray, Ajay K., Rohani, S., “Nucleation and Growth Kinetics of (R)-Mandelic Acid from Aqueous Solution in the Presence of the Opposite Enantiomer”. CRYSTAL GROWTH & DESIGN. 10(7): 2879-2887, 2010.

  41. Mao, S., Zhang, Y., Rohani, S., Ray, Ajay K. Ray., “Kinetics of (R,S)- and (R)-mandelic acid in an unseeded cooling batch crystallizer”. JOURNAL OF CRYSTAL GROWTH. 312(22): 3340-3348, 2010.

  42. Zhang, Y.X., Gao, B., Puma, G.L., Ray, Ajay K., Zeng, H.C., "Self-assembled Au/TiO2/CNTs ternary nanocomposites for photocatalytic applications", Science of Advanced Materials, 2 (4), pp. 503-513, 2010. 

  43. Quddus, M. R., Zhang, Y., Ray, Ajay K., "Multi-objective Optimization in Solid Oxide Fuel Cell for Oxidative Coupling of Methane", Chemical Engineering Journal, 165(2), p639-648, 2010. 

  44. Isimjan, T.T., Rohani, S., Ray, Ajay K., "Photo catalytic activities of Pt/ZIF-8 loaded highly ordered TiO2 nanotubes", Journal of Materials Chemistry, 20(45), p10241-10245, 2010. 

  45. Quddus, R. and Ray, Ajay K., “Modeling and Multiobjective optimization of oxidative coupling of methane in a catalytic membrane reactor”, Industrial and Engineering Chemistry Research, 49, p6469-6481, 2010. 

  46. Isimjan, T.T., Ruby, A.E., Rohani, S., Ray, Ajay K. "The fabrication of highly ordered and visible-light-responsive Fe-C-N-codoped TiO2 nanotubes", Nanotechnology 21 (5), art. no. 055706, 2010. 

  47. Eng, Y. Y., Sharma, V and Ray, Ajay K., “Degradation of anionic and cataionic surfactants in a monolithic swirl-flow photoreactor”, Chemosphere, 79(2), p205-209, 2010.

  48. Watt, S. D., Sidhu, H. S., Nelson, M. I., Ray, Ajay K., “Analysis of a model for ethanol production through continuous fermentation in multiple tanks”, International Journal of Chemical Reactor Engineering, 8, A52, 2010.

  49. Mazumder, J., Zhu, J., and Ray, Ajay K., “Optimal Operation of Liquid-Solid Circulating Fluidized Bed Ion-Exchange System for Continuous Protein Recovery”, Powder Technology, 199. p32-47, 2010.

  50. Zhang, Y., Ray, Ajay K., Rohani, S., “Measurement and prediction of phase diagrams of the enantiomeric 3-chloromandelic acid system”. CHEMICAL ENGINEERING SCIENCE. 64(2): 192-197, 2009.

  51. Ray, Ajay K., Book Review of "Principles of Mass Transfer and Separation Processes" by BK Dutta, Canadian Journal of Chemical Engineering, 87, p818-819, 2009. 

  52. Sharma, V. K., Anguandah, G.A.K., Ray, Ajay K., "Nonylphenol, Octyphenol and bisphenol A in the aquatic environment: A review on occurance, fate and treatment", J Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering, 44, p873-890, 2009.

  53. Ray, Ajay K., “Application of Multi-objective Optimization in the Design of Industrial Chemical Reactors”, in “Advances in Chemical Engineering, Vol. 37 – Chemical Reactors”, Elsevier Science, 2009

  54. Ray, Ajay K., "Photocatalytic reactor configurations for water purification: Experimentation and Modeling", Advances in Chemical Engineering, 36, p145-184, 2009.

  55. Kundu, P., Zhang, Y., Ray, Ajay K., “Multi-objective optimization of simulated countercurrent moving bed chromatographic reactor for oxidative coupling of methane”. CHEMICAL ENGINEERING SCIENCE. 64(19): 4137-4149, 2009.

  56. Kundu, P., Zhang, Y., Ray, Ajay K., “Modeling and simulation of simulated countercurrent moving bed chromatographic reactor for oxidative coupling of methane”. CHEMICAL ENGINEERING SCIENCE. 64(24): 5143-5152, 2009.

  57. Chakrabarti, S., Chaudhuri, B., Bhattacharjee, S., Dutta, B. K. and Ray, Ajay K., “Photoreduction of hexavalent chromium in aqueous solution in presence of zinc oxide as semiconductor catalyst”, Chemical Engineering Journal, 153, p86-93, 2009.

  58. Mazumder, J., Zhu, J., Bassi, A. S., and Ray, Ajay K., “Multiobjective Optimization of the Operation of a Liquid-Solid Circulating Fluidized Bed Ion-Exchange System for Continuous Protein Recovery”, Biotechnology & Bioengineering, 103, p873-890, 2009.

  59. Mazumder, J., Zhu, J., Bassi, A. S., and Ray, Ajay K., “Modeling and Simulation of Liquid-Solid Circulating Fluidized Bed Ion Exchange System for Continuous Protein Recovery”, Biotechnology & Bioengineering, 104, p111-126, 2009.

  60. Sharma. V. K., Anquandah, G. A. K., Yngard, R. A., Kim, H., Fekete, J., Bouzek, K., Golovko, D. and Ray, Ajay. K., “Nonylphenol, Octylphenol, and Bisphenol-A in the Aquatic Environment: A Review on Occurrence, Fate, and Treatment”, Journal of Environmental Science and Health: Part A, 44 (5), p423-442, 2009.

  61. Yan, Z., Hidajat, K. and Ray, Ajay K., “Multiobjective optimization of SMB and Varicol processes for Enantio-separation of racemic Pindolol”, Separation and Purification Technology, 65, p311-321, 2009.

  62. Agrawal, N., Rangaiah, G. P., Gupta, S. K. and Ray, Ajay K., “Dynamic Model of an Industrial LDPE Tubular Reactor and its use for Optimal Grade Change for Multiple Criteria”, Industrial and Engineering Chemistry Research, in press, 2009.

  63. Zhang, Y., Ray, Ajay K. and Rohani, S., “Measurement and prediction of phase diagrams of3-chloromandelic acid enantiomers”, Chemical Engineering Science, in press, 2008.

  64. Agrawal, N., Rangaiah, G. P., Gupta, S. K. and Ray, Ajay K., “Dynamic Model of an Industrial LDPE Tubular Reactor and its use for Optimal Grade Change for Multiple Criteria”, Industrial and Engineering Chemistry Research, in press, 2008.

  65. Watt, S. D., Sidhu, H. S., Nelson, M. I., Ray, Ajay K., “Analysis of a model for ethanol production through continuous fermentation in multiple tanks”, Biochemical Engineering Journal, in press, 2008.

  66. Yan, Z., Hidajat, K. and Ray, Ajay K., “Multiobjective optimization of SMB and Varicol processes for Enantio-separation of racemic Pindolol”, Separation and Purification Technology, in press, 2008.

  67. Zhang Y., Rohani S. and Ray, Ajay K., “Numerical determination of competitive isotherm of madelic acid enantiomers on cellulose bases chiral stationary phase”, J. Chromatography A., 1202, P34-39, 2008.  

  68. Lu, L., Zhang, Y., Wang, K., Zhao, X. S. and Ray, Ajay K., "Modeling of the adsorption diffusion breakthrough behaviors of lead in a fixed bed of ETS-10 adsorbent", Journal of Colloids and Interface Science, 325, p57-63, 2008.

  69. Watt, S. D., Sidhu, H.S., Nelson, M. I. and Ray, Ajay K., "Analysis of a model for ethanol production through continuous fermentation", Australian and New Zealand Industrial and Applied Mathematics (ANZIAM) Journal, 49, o C85-C99, 2007.

  70. Yablonsky, G. S. and Ray, Ajay K., "Equilibrium and Optimum: How to kill two birds with one stone?", International Journal of Chemical Reactor Engineering, Vol 6, A36, 2008.

  71. Zhou, J., Takeuchi, M., Ray, Ajay K., Anpo, M. and Zhao, X. S. “Enhancement of Photocatalytic Activity of P25 TiO2 by Vanadium Ion Implantation for Formic Acid Decomposition under Visible Light Irradiation”, Journal of Colloids and Interface Science, 311, p497-501, 2007.

  72. Sharma, V. K., Dutta, P. K. and Ray, Ajay K., “Review of kinetics of chemical and photo-catalytical oxidation of Arsenic(III) as influence by pH”, Journal of Environmental Science and Health Part A, 42, p997-1004 2007.

  73. Zhou, J., Zou, Z., Zhao, X.S. and Ray, Ajay K., "Preparation and Characterization of Polycrystalline Bismuth Titanate Bi12TiO20 and its Photocatalytic Properties under Visible Light Irradiation", Industrial and Engineering Chemistry Research, 46, p745-749, 2007.

  74. Sidhu, H. S., Watt, S. D., Nelson, M. I. and Ray, Ajay K., “Performance improvement and dynamical behavior analysis of a cascade of two CSTRs”, International Journal of Chemical Reactor Engineering, Vol. 5, A13, 2007.

  75. Lee, F. C., Rangaiah, G. P. and Ray, Ajay K., "Multiobjective optimization of an industrial Penicillin V bioreactor train using a non-dominated sorting genetic algorithm",  Biotechnology  & Bioengineering, 98, p586-598, 2007. 

  76. Agrawal, N., Gupta, S. K., Rangaiah, G. P., Ray, Ajay K., "Design Stage Optimization of an Industrial High-Pressure Polyethylene Tubular Reactor for Multiple Objectives using NSGA-II and its Jumping Gene Adaptations", Chemical Engineering Science, 62, p2346-2365, 2007.

  77. Tarafder, A., Rangaiah, G. P. and Ray, Ajay K., “A study of funding many solutions in multi-objective optimization of chemical processes”, Computers & Chemical Engineering, 31, p1257-1271, 2007.

  78. Bhutani, N., Tarafder, A., Rangaiah, G. P. and Ray, Ajay K., “A multi-platform Multi-language environment for process modeling, simulation and optimization”, International Journal of Computer Applications in Technology, 30(3), p197-214, 2007.

  79. Zhang, Y., Hidajat, K. and Ray, Ajay K., "Modified Reactive SMB for Production of High Concentrated Fructose Syrup by Isomerization of Glucose to Fructose", Biochemical Engineering Journal, 35, p341-351, 2007.

  80. Zhang, Y., Hidajat, K. and Ray, Ajay K., "Enantioseparation of Racemic Pindolol on Chira-AGP Stationary Phase by SMB and Varicol Processes" Chemical Engineering Science, 62, p1364-1375, 2007.

  81. Bhutani, N., Rangaiah, G. P. and Ray, Ajay K., "First Principles, Data Based and Hybrid Modeling and Optimization of an Industrial Hydrocracking Unit", Industrial and Engineering Chemistry Research, 45, p7807-7816, 2006.

  82. Zhou, J., Takeuchi, M., Zhao, X. S., Ray, Ajay K. and Apno, M. "Photocatalytic decomposition of formic acid under visible light irradiation over V-ion-implanted TiO2 thin film photocatalysts prepared on quartz substrate by ionized cluster beam (ICB) deposition method", Catalysis Letters, 106, p67-70, 2006.

  83. Agrawal, N., Gupta, S. K., Ray, A. K., Rangaiah, G. P. “Multi-objective Optimization of the Operation of an Industrial Low-Density Polyethylene Tubular Reactor using Genetic Algorithm and its Jumping Gene Adaptations”, Industrial and Engineering Chemistry Research, 45, p3182-3199, 2006.

  84. Kurup, S. A., Hidajat, K. and Ray, Ajay K., “Optimal operation of a Pseudo-SMB process for ternary separation under non-ideal conditions”, Separation and Purification Technology, 51(3), p387-403, 2006.

  85. Kurup, S. A., Hidajat, K. and Ray, Ajay K., “Comparative study of modified simulated moving bed systems at optimal conditions for the separation of ternary mixtures of xylene isomers”, Industrial and Engineering Chemistry Research, 45, p6251-6265, 2006.

  86. Zhang, Y., Hidajat, K. and Ray, Ajay K., "Determination of Competitive Adsorption Isotherm of Pindolol Enantiomers on Chiral-AGP Column", Journal of Chromatography A, 1131 (1-2), p176-184, 2006.

  87. Zhou, J., Zhang, Y., Zhao, X. S. and Ray, Ajay K., "Photodegradation of Benzoic Acid over Metal-doped TiO2, Industrial Engineering Chemistry Research, 45, p3503-3511, 2006.

  88. Eng, Y.Y., Sharma, V. K. and Ray, Ajay K., “Ferrate(VI): Green chemistry oxidant for degradation of cationic surfactant”, Chemosphere, 63, p1785-1790, 2006.

  89. Bhutani, N., Rangaiah, G. P. and Ray, Ajay K., “Modeling, simulation and multiobjective optimization of an industrial hydrocracking unit, Industrial and Engineering Chemistry Research, 45, p1354-1372, 2006.

  90. Kurup, S. A., Hidajat, K. and Ray, Ajay K., “A comparative study of modified simulated moving bed systems at optimal conditions for the separation of ternary mixtures under non-ideal conditions”, Industrial and Engineering Chemistry Research, 45, p3902-3915, 2006.

  91. Sharma, V. K., Mishra, S. K. and Ray, Ajay K., “Kinetic assessment of the potassium ferrate (VI) oxidation of antibacterial drug sulfamethoxazole”, Chemosphere, 62, p128-134, 2006.

  92. Yu, W., Hidajat K. and Ray, Ajay K., "Optimization of Hydrolysis of Methylacetate in SMBR and Varicol Systems, Chemical Engineering Journal, 112, p57-72, 2005.

  93. Wongso, F., Hidajat K. and Ray, Ajay K., “Improved Performance of Moving Bed Technology for Continuous Separation of 1,1’-bi-2-naphtol racemate”, Separation and Purification Technology, 46, p168-191, 2005.

  94. Kurup, S. A., Hidajat, K. and Ray, Ajay K., “Optimal operation of an industrial Parex process for the recovery of p-xylene from a mixture of C8 aromatics”, Industrial and Engineering Chemistry Research, 44, p5703-5714, 2005.

  95. Mehrotra, K., Yablonsky, G. S. and Ray, Ajay K., “Macro kinetic studies for photocatalytic degradation of benzoic acid in immobilized systems”, Chemosphere, 60(10), p1427-1436, 2005.

  96. Sharma, V. K., Kazama, F., Hu, J. and Ray, Ajay K., “Ferrates (Iron(VI) and Iron(V)) – Environmentally-Friendly Oxidants and Disinfectants”, Journal of Water and Health, 3(1), p45-58, 2005.

  97. Kurup, S. A., Subramani, H. J., Hidajat, K. and Ray, Ajay K., “Optimization of Reactive SMB and Varicol for Sucrose Inversion”, Chemical Engineering Journal, 108, p19-33, 2005.

  98. Dutta, P. K., Sharma, V. K., S. O. Pehkonnen and Ray, Ajay K., “Photocatalytic oxidation of As(III): Evidence of hydroxyl radical”, Environmental Science and Technology, 39(6), p1827-1834, 2005.

  99. Tarafder, A., Rangaiah, G. P. and Ray, Ajay K., “Multi-objective Optimization of an Industrial Styrene Monomer Manufacturing Process”, Chemical Engineering Science, 60 (2), p347-363, 2005

  100. Tarafder, A., Lee B. C. S., Ray, Ajay K. and Rangaiah, G. P., “Multi-objective Optimization of an Industrial Ethylene Reactor using a Non-dominated Sorting Genetic Algorithm”, Industrial and Engineering Chemistry Research, 44(1), p124-141, 2005.

  101. Yan Zhang, Kus Hidajat and Ray, Ajay K., “Optimal Design and Operation of SMB Bioreactor: Production of High Fructose Syrup by Isomerization of Glucose”, Biochemical Engineering Journal, 21(2), p111-121, 2004.

  102. Wongsu, F., Hidajat, K. and Ray, Ajay K., “Application of multi-objective optimization in the design of simulated moving bed for chiral drug separation”, Biotechnology & Bioengineering, 87(6), p704-722, 2004.

  103. Dutta, P. K. and Ray, Ajay K., “Experimental Investigation of Taylor Vortex Photocatalytic Reactor for Water Purification”, Chemical Engineering Science, 59 (22-23), p5249-5259, 2004.

  104. Dutta, P. K., Sharma, V. K. and Ray, Ajay K., “Adsorption of Arsenate and Arsenite on Titanium Dioxide Suspensions”, Journal of Colloid and Interface Science, 278(2), p270-275, 2004

  105. Subramani, H. J., Hidajat, K. and Ray, Ajay K., "Multiobjective Optimization of simulated moving bed reactor and its modification - Varicol process", Canadian Journal of Chemical Engineering, 82 (3), p590-598, 2004.

  106. Wang, X., Pehkonnen, S. O. and Ray, Ajay K., "Removal of aqueous Cr(VI) by a combination of photocatalytic reduction and coprecipitation", Industrial and Engineering Chemistry Research, 43, p1665-1672, 2004.

  107. Yu, W., Hidajat K. and Ray, Ajay K., "Determination of adsorption and kinetic parameters for methylacetate synthesis reaction in Amberlyst 15 ion exchange resin", Applied Catalysis A: General, 260(2), p191-205, 2004. 

  108. Yu, W., Zhang, Z., Subramani, H.  J., Ray, Ajay K., “Application of Multi-objective optimization in the design of SMB in Chemical Process Industry”, Chinese Journal of Chemical Engineering, 35(1), p141-148, 2004.

  109. Wang, X., Pehkonnen, S. O. and Ray, Ajay K., “Photocatalytic reduction of Hg(II) on two commercial TiO2 catalysts”, Electrochemical ACTA, 49(9-10), p1435-1444, 2003.

  110. Yu, W., Hidajat, K. and Ray, Ajay K., “Application of Multi-objective Optimization in the Design and Operation of Reactive SMB and its Experimental Verification”, Industrial and Engineering Chemistry Research, 42, p6823-6831, 2003. 

  111. Yu, W., Hidajat, K. and Ray, Ajay K., “Modeling, Simulation and Experimental Study of the Simulated Moving Bed Reactor for the Synthesis of Methyl Acetate Ester”, Industrial and Engineering Chemistry Research, 42, p6743-6754, 2003. 

  112. Zhou, S. and Ray, Ajay K., "Kinetic studies for photocatalytic degradation of Eosin B on thin film of TiO2", Industrial and Engineering Chemistry, 42, p6020-6033, 2003. 

  113. Subramani, H. J., Hidajat, K. and Ray, Ajay K., “Optimization of Reactive SMB and Varicol Systems”, Computers & Chemical Engineering, 27(12), p1883-1901, 2003. 

  114. Nandasana, A. D., Ray, Ajay K. and Gupta, S. K., “Dynamic model of an industrial steam reformer and its use for multiobjective optimization”, Industrial and Engineering Chemistry Research, 42, p4028-4042, 2003. 

  115. Kasat, R. B., Ray, Ajay K. and Gupta, S. K., "Applications of genetic algorithm in polymer science and engineering", Materials and Manufacturing Processes, 18(3), p523-532, 2003. 

  116. Mehrotra, K., Yablonsky, G. S. and Ray, Ajay K., "Kinetic studies of photocatalytic degradation in TiO2 slurry system: Distinguishing working regimes and determining rate dependences”, Industrial and Engineering Chemistry Research, 42(11), p2273-2281, 2003. 

  117. Subramani, H. J., Hidajat, K. and Ray, Ajay K., “Optimization of Simulated Moving Bed and Varicol Processes for Glucose-Fructose Separation, Trans. IChemE, Part A: Chemical Engineering Research and Design, 81(A5), p549-567, 2003. 

  118. Nandasana, A. D., Ray, Ajay K. and Gupta, S. K., "Applications of the non-dominated sorting genetic algorithm (NSGA) in chemical reaction engineering”, International Journal of Chemical Reactor Engineering, Vol. 1, R2, p1-18, 2003. 

  119. Kabir, M. F. and Ray, Ajay K., "Performance enhancement of a chemical reactor using flow instability", Journal of Chemical Technology and Biotechnology, 78(2), p314-320, 2003.

  120. Yu, W., Hidajat K. and Ray, Ajay K., "Optimal Operation of Reactive Simulated Moving Bed and Varicol Systems, Journal of Chemical Technology and Biotechnology, 78(2), p287-293, 2003. 

  121. Ray, Ajay K., “Major challenges in the development of photocatalytic reactor for water purification”, Ultrapure Water, 20(2), p37-44, 2003. 

  122. Li, Y., Rangaiah, G. P. and Ray, Ajay K., “Optimization of styrene reactor design for two objectives using a genetic algorithm”, International Journal of Chemical Reactor Engineering, Vol. 1, A13, p1-13, 2003. 

  123. Mehrotra, K. and Ray, Ajay K, "Performance enhancement of a photocatalytic reactor using flow instability", International Journal of Chemical Reactor Engineering, Vol. 1, A12, p1-20, 2003. 

  124. Yee, A. Y., Rangaiah, G. P. and Ray, Ajay K., "Multiobjective optimization of an industrial styrene reactor", Computers and Chemical Engineering, 27(1), p111-130, 2003. 

  125. Zhang, Z., Hidajat, K., Morbidelli, M. and Ray, Ajay K., "Multi-objective optimization of simulated moving bed system and Varicol process for chiral separation", AIChE Journal, 48(12), p2800-2816, 2002. 

  126. Zhang, Z., Hidajat, K. and Ray, Ajay K., "Multi-objective optimization of simulated moving bed reactor for MTBE synthesis", Industrial and Engineering Chemistry Research, 41, p3213-3232, 2002. 

  127. Oh, P. P., Rangaiah, G. P. and Ray, Ajay K., "Simulation and multi-objective optimization of an industrial hydrogen plant based on refinery off-gas", Industrial and Engineering Chemistry Research, 41(9), p2248-2261, 2002. 

  128. Oh, P. P., Ray, Ajay K. and Rangaiah, G. P. "Triple objective optimization of industrial hydrogen plants", Journal of Chemical Engineering Japan, 34(11), p1341-1355, 2001. 

  129. Zhang, Z., Hidajat, K. and Ray, Ajay K., "Application of simulated moving bed chromatographic reactor for MTBE synthesis", Industrial and Engineering Chemistry Research, 40(23), p5305-5316, 2001. 

  130. Sengupta, T. K., Kabir, M. F. and Ray, Ajay K., "A Taylor vortex photocatalytic reactor for water purification", Industrial and Engineering Chemistry Research, 40(23), p5268-5281, 2001. 

  131. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., "Modeling of an industrial wiped film poly(ethylene terephthalate) reactor, Polymer Reaction Engineering, 9(2), p71-99, 2001. 

  132. Zhang, Z., Hidajat, K. and Ray, Ajay K., "Determination of adsorption and kinetic parameters for MTBE synthesis from TBA and methanol", Journal of Catalysis, 200(2), p209-221, 2001. 

  133. Zhou, F., Gupta, S. K. and Ray, Ajay K., "Modeling of the sheet-molding process for Poly(methyl methacrylate)", Journal of Applied Polymer Science, 81(8), p1951-1971, 2001. 

  134. Chen, D. W., Li, F. and Ray, Ajay K., "External and internal and mass transfer effect in photocatalytic degradation", Catalysis Today, 66 (2-4), p475-485, 2001. 

  135. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., "Multiobjective optimization of industrial poly(ethylene terephthalate) reactor: Some further insights", Computers and Chemical Engineering, 25 (2-3), p391-407, 2001. 

  136. Chen, D. W. and Ray, Ajay K., "Removal of toxic metal ions in wastewater by semiconductor photocatalysis", Chemical Engineering Science, 56(4), p1561-1570, 2001. 

  137. Rajesh, J. K., Gupta, S. K., Rangaiah, G. P. and Ray, Ajay K., "Multi-objective optimization of industrial hydrogen plants", Chemical Engineering Science, 56(3), p999-1010, 2001. 

  138. Shen, J. and Ray, Ajay K., "Performance improvement of activated sludge wastewater treatment process by non-linear natural oscillations", Chemical Engineering & Technology, 23(12), p1115-1122, 2000. 

  139. Zhou, F., Gupta, S. K. and Ray, Ajay K., "Multiobjective optimization of the continuous casting process for poly(methyl methacrylate) using adapted genetic algorithm", Journal of Applied Polymer Science, 78(7), p1439-1458, 2000. 

  140. Chen, D. W., Sivakumar, M. and Ray, Ajay K., "Semiconductor photocatalysis in environmental remediation", a review paper, Developments in Chemical Engineering and Mineral Processing Journal, 8 (5/6), p505-550, 2000. 

  141. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., "Applications of multi-objective optimization in chemical engineering", Reviews in Chemical Engineering, 16(1), p1-54, 2000. 

  142. Yuen, C. C., Aatmeeyata, Gupta, S. K. and Ray, Ajay K., "Multi-objective optimization of membrane separation modules using genetic algorithm", Journal of Membrane Science, 176(2), p177-196, 2000. 

  143. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., "Multi-objective optimization of an industrial wiped-film PolyEthylene Terephthalate reactor", AIChE Journal, 46(5), p1046-1058, 2000. 

  144. Chen, D. W., Li, F. and Ray, Ajay K., "Effect of mass transfer and catalyst layer thickness on photocatalytic reaction", AIChE Journal, 46(5), p1034-1045, 2000. 

  145. Rajesh, J. K., Gupta, S. K., Rangaiah, G. P. and Ray, Ajay K., "Multi-objective optimization of steam reformer using genetic algorithm", Industrial & Engineering Chemistry Research, 39(3), p706-717, 2000. 

  146. Periathamby, U. and Ray, Ajay K., “Computer simulation of a photocatalytic reactor using distributive computing”, Chemical Engineering and Technology, 22 (10), p881-888, 1999. 

  147. Chen, D. W. and Ray, Ajay K., “Photocatalytic kinetics of phenols and its derivatives over UV irradiated TiO2”, Applied Catalysis B: Environmental, 23, p143-157, 1999. 

  148. Ray, Ajay K., “Design, modeling and experimentation of a new large-scale photocatalytic reactor for water treatment", Chemical Engineering Science, 54 (15-16), p3113-3125, 1999. 

  149. Mukherjee, P. S. and Ray, Ajay K., "Major challenges in the design of a large-scale photocatalytic reactor for water treatment", Chemical Engineering and Technology, 22(3), p253-260, 1999. 

  150. Ray, Ajay K., “A new photocatalytic reactor for destruction of toxic water pollutants by advanced oxidation process", Catalysis Today, 44, p357-368, 1998. 

  151. Ray, Ajay K., “Simulation of photocatalytic reactor using CFD”, IES Journal Chemical Engineering Issue, 38 (3), p22-27, 1998. 

  152. Chen, D. W. and Ray, Ajay K., "Photodegradation kinetics of 4-Nitrophenol in TiO2 aqueous suspensions", Water Research, 32 (11), p3233-3234, 1998. 

  153. Ray, Ajay K. and Beenackers, A. A. C. M., “A novel photocatalytic reactor for water purification”, AIChE Journal, 44(2), p477-483, 1998. 

  154. Ray, Ajay K. and Beenackers, A. A. C. M., “Development of a new photocatalytic reactor for purification”, Catalysis Today, 40, p73-83, 1998. 

  155. Ray, Ajay K. and Beenackers, A.A.C.M., “A novel swirl-flow reactor for kinetic studies of semiconductor photocatalysis”, AIChE Journal, 43(10), p2571-2578, 1997. 

  156. Ray, Ajay K., “New photocatalytic reactors for destruction of toxic water pollutants”, Developments in Chemical Engineering & Mineral Processing, 5, p115-128, 1997. 

  157. Ray, Ajay K., “Performance improvement of a chemical reactor by non-linear natural oscillations”, The Chemical Engineering Journal, 59(2), p169-175, 1995. 

  158. Ray, Ajay K., Carr, R. W. and Aris, R., “Numerical simulation of a simulated countercurrent moving bed chromatographic reactor”, Chemical Engineering Science, 50(19), p3033-3041, 1995. 

  159. Ray, Ajay K. and Carr, R. W., “Experimental study of a laboratory scale simulated countercurrent moving bed chromatographic reactor”, Chemical Engineering Science, 50(14), p2195-2202, 1995. 

  160. Ray, Ajay K., Carr, R. W. and Aris, R., “The simulated countercurrent moving bed chromatographic reactor: a novel reactor-separator”, Chemical Engineering Science, 49(4), p469-480, 1994. 

  161. Ray, Ajay K., Tonkovich, A., Carr, R. W. and Aris, R., “The simulated countercurrent moving bed chromatographic reactor: a novel reactor-separator”, Chemical Engineering Science, 45(8), p2431-2437, 1990. 

  162. Ray, Ajay K. and Gupta, S. K., “Optimization of nonvaporizing nylon 6 Reactors with stopping conditions and end-point constraints”, Polymer Engineering Science, 26, p1033-1044, 1986. 

  163. Ray, Ajay K. and Gupta, S. K., “Optimization of nonvaporizing nylon 6 reactors with stopping conditions”, Journal of Applied Polymer Science, 30, p4529-4550, 1985.

Submitted for Publication in Refereed International Journal (under Review)

  1. Athapaththu, S., Ray, Ajay K., “Reduction of Cd(II) from Aqueous Solution via Adsorption and Solar Photocatalysis”, Submitted  to Chemical Engineering Journal, 2015.

  2. Hashem, N., Ray, Ajay K., “ Multi-objective Optimization of Chiral Separation of Nadolol by Simulated Moving Bed Chromatographic Separator”, Submitted to Canadian Journal of Chemical Engineering, 2015.

  3. Kumordzi, G., Yanful, E., Ray, Ajay K., “ Solar Photocatalytic Reduction of Zn2+ Using Graphene Based TiO2 Composite Catalyst for Application to CSO Treatment”, Submitted to Industrial and Engineering Chemistry Research, 2015.

  4. Palys, M., Ivanov, S., Ray, Ajay K., “Conceptual approach in Multi-objective Optimization of Packed Bed Membrane Reactor for Ethylene Epoxidation using Non-dominating Sorting Genetic Algorithm NSGA-II”, Submitted to Chemical Engineering and Processing, 2015.

  5. Mitra Ray, N., Ray, Ajay K., “ Multi-objective Optimization of Biodiesel Synthesis in Simulated Moving Bed Chromatographic Reactor”, Submitted to Canadian Journal of Chemical Engineering, 2015.

  6. Mitra Ray, N., Ray, Ajay K., “Determination of Adsorption and Kinetic Parameters for Methyl Oleate (Biodiesel) Esterification Reaction Catalyzed by Amberlyst 15 Resin”. Canadian Journal of Chemical Engineering, 2015. (Revision Requested)

  7. Hashem, N., Ray, Ajay K., “Modeling and Separation of Nadolol by Simulated Moving Bed Chromatographic Separator”, Submitted to Separation and Purification Technology, 2015.

  8. Manoli, K., Nakhla, G., Ray, Ajay K., “Oxidation of Urea by Ferrate(VI)”, Chemical Engineering Journal,2015. (Revision Requested)

  9. Siddiqui, H., Xu, C., Ray, Ajay K., “Lignin-based Phenol-Formaldehyde Resoles from Hydrolytically Depolymerized Kraft Lignin: Optimization of Synthesis Parameters for Curing Temperature”, Submitted to Polymer Engineering Science, 2015.

Conference Papers Published in Proceedings

  1. Ivanov, S. Y., Ray, Ajay K., “Multiobjective optimization of industrial petroleum processing units using Genetic algorithms”. Proceedings of XV INTERNATIONAL SCIENTIFIC CONFERENCE CHEMISTRY AND CHEMICAL ENGINEERING IN XXI CENT. 15th International Scientific Conference on Chemistry and Chemical Engineering in 21st Century, Tomsk, Russian Federation, 2014-05-26 (7-14).

  2. Chowdhury, P., Gomaa, H., Ray, Ajay K., “Dye-sensitized Photocatalyst - A Breakthrough in Green Energy and Environmental Applications”. 2011 AIChE Annual Meeting, Conference Proceedings. 2011 AIChE Annual Meeting, Minneapolis, 2011-10-16 (30-39).

  3. Chowdhury, P., Ray, Ajay K., “Dye-sensitized Visible Light Photocatalysis for Hydrogen Production”. 8th World Congress of Chemical Engineering, Montreal, 2009-08-23.

  4. Sacasa, C., Bassi, A., Ray, Ajay K., “Microalgae Production for Biodiesel in a Photo-bioreactor”. 8th World Congress of Chemical Engineering, Montreal, 2009-08-23

  5. Ray, Ajay K., "Applications of Multi-objective Optimization in the Design of SMB Separators and Reactor-Separators", Proceedings of Golden Jubilee Indian Institute of Chemical Engineers Conference Proceedings, IIChE 2007, p10-20, 2007.

  6. Ray, Ajay K. Ray, "Improving ethanol production through continuous fermentation", Proceedings of 35th Australasian Chemical Engineering Conference, CHEMECA 2007, P1862-1869, 2007.

  7. Ray, Ajay K. and Yu, W., Optimal Design of Reactive Simulated Moving Bed and Varicol Systems, 8th International Symposium on Process Systems Engineering, 5-10 January, Kunming, China, 2004.

  8. Ray, Ajay K., Rangaiah, G. P. and Tarafder, A., Application of Non-dominated Sorting Genetic Algorithms for Multi-objective Optimization of an Industrial Styrene Reactor, International Conference on Computational Intelligence, Robotics and Autonomous Systems (CIRAS 2003) December 15-18, Singapore, 2003.

  9. Ray, Ajay K., Wongso, F. and Hidajat, K., Application of multiobjective optimization in the design of chiral drug separators based on SMB Technology, 1-4 June, Lappeenranta, Finland, 2003.

  10. Ray, Ajay K., Design and Development of large-scale photocatalytic reactor, Proceedings of First Asia Regional Conference on Ultraviolet Technologies for Water, Wastewater and Environmental Applications, 30-31 October, Singapore, 2002.

  11. Ray, Ajay K., G. P. Rangaiah and Lee, Y. M., Modeling and multiobjective optimization of ethylene reactor, Proceedings regional conference of chemical engineering, Malaysia, 28-30 October, 2002.

  12. Ray, Ajay K and Yablonsky, G. S., Germinating seed problem: Approach to chemical engineering education, Proceedings of 2nd Symposium on teaching and learning in higher education, 4-6 September, National University of Singapore, 2002.

  13. Ray, Ajay K., Major challenges in the design of large-scale photocatalytic reactor, Proceedings of Ultrapure water Asia, 14-15 August, Singapore, 2002.

  14. Zhang, Z., Hidajat, K. and Ray, Ajay K., Applications of simulated countercurrent moving bed chromatographic reactor for MTBE synthesis, Proceedings of Chemcon 2000, PDD 1-4, Calcutta, December, 2000.

  15. Bhaskar, V., Ray, Ajay K., and Gupta, S. K., Simulation of an industrial wiped-film PET reactor and its multiobjective optimization using genetic algorithm, Proceedings of Chemcon 2000, IT 1-4, Calcutta, December, 2000.

  16. Kabir, M. F., Sengupta, T. K. and Ray, Ajay K., Taylor Vortex Reactor for Water Purification using Semiconductor Photocatalysis, Proceedings of Chemcon 2000, WTR 5-8, Calcutta, December, 2000.

  17. Yuen, C. C., Aatmeeyata, Gupta, S. K. and Ray, Ajay K., Multiobjective Optimization for Production of Low Alcohol Content Beer with Good Taste using Membrane Separation Modules, Proceedings of Chemcon 2000, FP 1-4, Calcutta, December, 2000.

  18. Khetawat, V. and Ray, Ajay K., Design of a new two-phase reactor for kinetic studies of semiconductor photocatalysis using CFD, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p1667-1670.

  19. Chen, Dingwang and Ray, Ajay K., Elimination of mercury in wastewater by heterogeneous photocatalysis, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p829-832.

  20. Rajesh, J., Gupta, S. K., Rangaiah, G. P. and Ray, Ajay K., Multi-objective optimization of industrial steam reformers, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p203-206.

  21. Shen, Jianqiang and Ray, Ajay K., Performance improvement of activated sludge wastewater treatment process by non-linear oscillations, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p275-278.

  22. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., Simulation of an industrial finishing-stage polycondensation reactor in the poly(ethylene terephthalate) manufacture, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p59-62.

  23. Khetawat, V. and Ray, Ajay K., Design of a novel swirl-flow monolithic type reactor for kinetic studies of semiconductor photocatalysis using CFD, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p165-170.

  24. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., Modeling of an industrial wiped-film Poly Ethylene Terephthalate reactor, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p187-192.

  25. Shen, Jianqiang and Ray, Ajay K., Performance improvement of chemical reactors by non-linear natural oscillations, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p229-236.

  26. Ray, Ajay K., Challenges in the design and development of large-scale photocatalytic reactor for water purification, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p317-322.

  27. Chen, D. W. and Ray, Ajay K., Photocatalytic Degradation of Organics in Aqueous Suspensions, Proceedings of the First International Conference on Remediation of Chlorinated and Recalcitrant Compounds, p478-483, Monterey, California, May, 1998.

  28. Uvaraj, P. and Ray, Ajay K., Reactive Flow Simulation using Distributive Computing, Proceedings of the 16th IASTED International Conference on Applied Informatics, edited by MH Hamza, p409-412, Germisch-partenkirchen, Germany, June, 1998.

  29. Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors, Proceedings of 2nd Asia-Pacific Conference on Sustainable Energy and Environmental Technology, p25-32, Gold Coast, Australia, 14-17 June, 1998.

  30. Shen, Jianqiang and Ray, Ajay K., Performance Improvement of Activated Sludge Process By Non-Linear Natural Oscillations, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, Singapore, p311-316, 8-10 April, 1998.

  31. Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, p268-273, Singapore, 8-10 April, 1998.

  32. Chen, Dingwang and Ray, Ajay K.,, Photocatalytic Oxidation of Toxic Organics Over Illuminated TiO2 Catalyst, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, p545-550, Singapore, 8-10 April, 1998.

  33. Chen, Dingwang and Ray, Ajay K., Semiconductor Photocatalysis in Environmental Remediation, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, p479-488, Singapore, 8-10 April, 1998.

  34. Periathamby, U. and Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors, Proceedings of Golden Jubilee Congress and CHEMCON-97 of Indian Institute of Chemical Engineers (IIChE), p570-580, December 15-18, New Delhi, India, 1997.

  35. Periathamby, U. and Ray, Ajay K., Simulation of Reacting Flows using Distributive Computing Environment, Proceedings of 7th Asian Congress of Fluid Mechanics, p181-186, December 8-12, Chennai, India, 1997.

  36. Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors in Distributive Computing Environment, Proceedings of Asia-Pacific Congress on Catalysis, p131-136, November 2-5, Kyongju, Republic of Korea, 1997.

  37. Periathamby, U. and Ray, Ajay K., Reactive Flow Modelling using Parallel Computing, Proceedings of International Conference on Parallel and Distributive Computing, p171-175, August 11-14, Singapore, 1997.

  38. Periathamby, U. and Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors for Destruction of Toxic Water Pollutants, Proceedings of the 2nd International Conference on the Application of Numerical Methods in Engineering, Edited by S. Basri, A. A. A. Samad and A. M. Hamouda, p141-152, June 23-25, Selangor, Malaysia.

  39. Periathamby, U. and Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors for on a Distributive Computing Environment, Seminar Proceedings of the Applications of High Performance Computing, March 21, NUS, p5-12, Singapore.

  40. Ray, Ajay K., Novel Photocatalytic Reactors for Water Purification, Proceedings of the Asia-Pacific Conference on Sustainable Energy and Environmental Technology, Edited by Paul F. Greenfield, C. Y. Liu, J. H. Tay, G. Q. Lu, A. C. Lua and K. C. Toh, 19-21 June 1996, Singapore, p25-32.

  41. Chen, D. and Ray, Ajay K., Flow characteristics in three-phase external airlift loop reactor, Proceedings of the Fifth Asian Conference on Fluidized Bed & Three-Phase Reactors, Edited by Wei-Ming Lu and Lii-Ping Leu, p 262, Taipei, December 1996.

  42. Chen, D. and Ray, Ajay K., "Liquid backmixing characteristics and gas-liquid mass transfer coefficient in three-phase external airlift loop reactor, Proceedings of the Fifth Asian Conference on Fluidized Bed & Three-Phase Reactors”, Edited by Wei-Ming Lu and Lii-Ping Leu, p 283, Taipei, December 1996.

  43. Ivanov, S. Y., Ray, Ajay K., “Multiobjective optimization of industrial petroleum processing units using Genetic algorithms”. Proceedings of XV INTERNATIONAL SCIENTIFIC CONFERENCE CHEMISTRY AND CHEMICAL ENGINEERING IN XXI CENT. 15th International Scientific Conference on Chemistry and Chemical Engineering in 21st Century, Tomsk, Russian Federation, 2014-05-26 (7-14).

  44. Chowdhury, P., Gomaa, H., Ray, Ajay K., “Dye-sensitized Photocatalyst - A Breakthrough in Green Energy and Environmental Applications”. 2011 AIChE Annual Meeting, Conference Proceedings. 2011 AIChE Annual Meeting, Minneapolis, 2011-10-16 (30-39).

  45. Chowdhury, P., Ray, Ajay K., “Dye-sensitized Visible Light Photocatalysis for Hydrogen Production”. 8th World Congress of Chemical Engineering, Montreal, 2009-08-23.

  46. Sacasa, C., Bassi, A., Ray, Ajay K., “Microalgae Production for Biodiesel in a Photo-bioreactor”. 8th World Congress of Chemical Engineering, Montreal, 2009-08-23

  47. Ray, Ajay K., "Applications of Multi-objective Optimization in the Design of SMB Separators and Reactor-Separators", Proceedings of Golden Jubilee Indian Institute of Chemical Engineers Conference Proceedings, IIChE 2007, p10-20, 2007.

  48. Ray, Ajay K. Ray, "Improving ethanol production through continuous fermentation", Proceedings of 35th Australasian Chemical Engineering Conference, CHEMECA 2007, P1862-1869, 2007.

  49. Ray, Ajay K. and Yu, W., Optimal Design of Reactive Simulated Moving Bed and Varicol Systems, 8th International Symposium on Process Systems Engineering, 5-10 January, Kunming, China, 2004.

  50. Ray, Ajay K., Rangaiah, G. P. and Tarafder, A., Application of Non-dominated Sorting Genetic Algorithms for Multi-objective Optimization of an Industrial Styrene Reactor, International Conference on Computational Intelligence, Robotics and Autonomous Systems (CIRAS 2003) December 15-18, Singapore, 2003.

  51. Ray, Ajay K., Wongso, F. and Hidajat, K., Application of multiobjective optimization in the design of chiral drug separators based on SMB Technology, 1-4 June, Lappeenranta, Finland, 2003.

  52. Ray, Ajay K., Design and Development of large-scale photocatalytic reactor, Proceedings of First Asia Regional Conference on Ultraviolet Technologies for Water, Wastewater and Environmental Applications, 30-31 October, Singapore, 2002.

  53. Ray, Ajay K., G. P. Rangaiah and Lee, Y. M., Modeling and multiobjective optimization of ethylene reactor, Proceedings regional conference of chemical engineering, Malaysia, 28-30 October, 2002.

  54. Ray, Ajay K and Yablonsky, G. S., Germinating seed problem: Approach to chemical engineering education, Proceedings of 2nd Symposium on teaching and learning in higher education, 4-6 September, National University of Singapore, 2002.

  55. Ray, Ajay K., Major challenges in the design of large-scale photocatalytic reactor, Proceedings of Ultrapure water Asia, 14-15 August, Singapore, 2002.

  56. Zhang, Z., Hidajat, K. and Ray, Ajay K., Applications of simulated countercurrent moving bed chromatographic reactor for MTBE synthesis, Proceedings of Chemcon 2000, PDD 1-4, Calcutta, December, 2000.

  57. Bhaskar, V., Ray, Ajay K., and Gupta, S. K., Simulation of an industrial wiped-film PET reactor and its multiobjective optimization using genetic algorithm, Proceedings of Chemcon 2000, IT 1-4, Calcutta, December, 2000.

  58. Kabir, M. F., Sengupta, T. K. and Ray, Ajay K., Taylor Vortex Reactor for Water Purification using Semiconductor Photocatalysis, Proceedings of Chemcon 2000, WTR 5-8, Calcutta, December, 2000.

  59. Yuen, C. C., Aatmeeyata, Gupta, S. K. and Ray, Ajay K., Multiobjective Optimization for Production of Low Alcohol Content Beer with Good Taste using Membrane Separation Modules, Proceedings of Chemcon 2000, FP 1-4, Calcutta, December, 2000.

  60. Khetawat, V. and Ray, Ajay K., Design of a new two-phase reactor for kinetic studies of semiconductor photocatalysis using CFD, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p1667-1670.

  61. Chen, Dingwang and Ray, Ajay K., Elimination of mercury in wastewater by heterogeneous photocatalysis, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p829-832.

  62. Rajesh, J., Gupta, S. K., Rangaiah, G. P. and Ray, Ajay K., Multi-objective optimization of industrial steam reformers, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p203-206.

  63. Shen, Jianqiang and Ray, Ajay K., Performance improvement of activated sludge wastewater treatment process by non-linear oscillations, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p275-278.

  64. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., Simulation of an industrial finishing-stage polycondensation reactor in the poly(ethylene terephthalate) manufacture, Proceedings of the 8th APCChE Congress, Seoul, Korea, August 1999, p59-62.

  65. Khetawat, V. and Ray, Ajay K., Design of a novel swirl-flow monolithic type reactor for kinetic studies of semiconductor photocatalysis using CFD, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p165-170.

  66. Bhaskar, V., Gupta, S. K. and Ray, Ajay K., Modeling of an industrial wiped-film Poly Ethylene Terephthalate reactor, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p187-192.

  67. Shen, Jianqiang and Ray, Ajay K., Performance improvement of chemical reactors by non-linear natural oscillations, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p229-236.

  68. Ray, Ajay K., Challenges in the design and development of large-scale photocatalytic reactor for water purification, Proceedings of Chemical and Environmental Engineering, World Engineering Congress 1999, Edited by Robiah Yunus, F. R. Ahmadun, A. T. Jameel and Z. Z. Abidin, Malaysia, July, 1999, p317-322.

  69. Chen, D. W. and Ray, Ajay K., Photocatalytic Degradation of Organics in Aqueous Suspensions, Proceedings of the First International Conference on Remediation of Chlorinated and Recalcitrant Compounds, p478-483, Monterey, California, May, 1998.

  70. Uvaraj, P. and Ray, Ajay K., Reactive Flow Simulation using Distributive Computing, Proceedings of the 16th IASTED International Conference on Applied Informatics, edited by MH Hamza, p409-412, Germisch-partenkirchen, Germany, June, 1998.

  71. Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors, Proceedings of 2nd Asia-Pacific Conference on Sustainable Energy and Environmental Technology, p25-32, Gold Coast, Australia, 14-17 June, 1998.

  72. Shen, Jianqiang and Ray, Ajay K., Performance Improvement of Activated Sludge Process By Non-Linear Natural Oscillations, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, Singapore, p311-316, 8-10 April, 1998.

  73. Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, p268-273, Singapore, 8-10 April, 1998.

  74. Chen, Dingwang and Ray, Ajay K.,, Photocatalytic Oxidation of Toxic Organics Over Illuminated TiO2 Catalyst, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, p545-550, Singapore, 8-10 April, 1998.

  75. Chen, Dingwang and Ray, Ajay K., Semiconductor Photocatalysis in Environmental Remediation, Proceedings of Environmental Strategies for the 21st Century – an Asia Pacific Conference on Environment 98, p479-488, Singapore, 8-10 April, 1998.

  76. Periathamby, U. and Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors, Proceedings of Golden Jubilee Congress and CHEMCON-97 of Indian Institute of Chemical Engineers (IIChE), p570-580, December 15-18, New Delhi, India, 1997.

  77. Periathamby, U. and Ray, Ajay K., Simulation of Reacting Flows using Distributive Computing Environment, Proceedings of 7th Asian Congress of Fluid Mechanics, p181-186, December 8-12, Chennai, India, 1997.

  78. Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors in Distributive Computing Environment, Proceedings of Asia-Pacific Congress on Catalysis, p131-136, November 2-5, Kyongju, Republic of Korea, 1997.

  79. Periathamby, U. and Ray, Ajay K., Reactive Flow Modelling using Parallel Computing, Proceedings of International Conference on Parallel and Distributive Computing, p171-175, August 11-14, Singapore, 1997.

  80. Periathamby, U. and Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors for Destruction of Toxic Water Pollutants, Proceedings of the 2nd International Conference on the Application of Numerical Methods in Engineering, Edited by S. Basri, A. A. A. Samad and A. M. Hamouda, p141-152, June 23-25, Selangor, Malaysia.

  81. Periathamby, U. and Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors for on a Distributive Computing Environment, Seminar Proceedings of the Applications of High Performance Computing, March 21, NUS, p5-12, Singapore.

  82. Ray, Ajay K., Novel Photocatalytic Reactors for Water Purification, Proceedings of the Asia-Pacific Conference on Sustainable Energy and Environmental Technology, Edited by Paul F. Greenfield, C. Y. Liu, J. H. Tay, G. Q. Lu, A. C. Lua and K. C. Toh, 19-21 June 1996, Singapore, p25-32.

  83. Chen, D. and Ray, Ajay K., Flow characteristics in three-phase external airlift loop reactor, Proceedings of the Fifth Asian Conference on Fluidized Bed & Three-Phase Reactors, Edited by Wei-Ming Lu and Lii-Ping Leu, p 262, Taipei, December 1996.

  84. Chen, D. and Ray, Ajay K., "Liquid backmixing characteristics and gas-liquid mass transfer coefficient in three-phase external airlift loop reactor, Proceedings of the Fifth Asian Conference on Fluidized Bed & Three-Phase Reactors”, Edited by Wei-Ming Lu and Lii-Ping Leu, p 283, Taipei, December 1996.

Papers presented in Conference (not published in any proceedings)

  1. Ray, Ajay K. and Gupta, S. K. Optimization of Nylon 6 Reactor, Paper presented at 1985 Annual AIChE Conference, Chicago, United States.

  2. Ray, Ajay K., Carr, R. W. and Aris, R., Simulated Counter-current Moving Bed Chromatographic Reactor, Paper presented at 11th International Symposium on Chemical Reaction Engineering, July 1990, Toronto, Canada.

  3. Ray, Ajay K. and Beenackers, A. A. C. M., Heterogeneous Photocatalysis in a Flat Plate Reactor, Paper presented at First International Conference on Advanced Oxidation Technologies, 25-30 June 1994, London, Canada.

  4. Ray, Ajay K. and Beenackers, A. A. C. M., A Novel Photocatalytic Reactor for Water Purification, Paper presented at World Environmental Congress, 15-18 September 1995, London, Canada.

  5. Ray, Ajay K. and Beenackers, A. A. C. M., Novel Photocatalytic Reactors for Water Purification, Paper presented at 5th World Congress on Chemical Engineering, 14-17 July, 1996, San Diego, United States.

  6. Ray, Ajay K., Novel Photocatalytic Reactors for Water Purification , Paper presented at 1996 Annual AIChE Conference, 10-15 November, Chicago, United States.

  7. Ray, Ajay K., Numerical Simulation of Photocatalytic Reactors, Paper presented at 1997 Annual AIChE Conference, 17-21 November, Los Angeles, United States.

  8. Ray, Ajay K., Novel Photocatalytic Reactors for Water Treatment, AIChE Annual Meeting, Miami Beach, Florida, USA, November 1998.

  9. Ray, Ajay K., Reactive Flow Simulation Using Distributive Computing Environment, AIChE Annual Meeting, Miami Beach, Florida, USA, November 1998.

  10. Ray, Ajay K., Design of Photocatalytic Reactors, International Symposium of Chemical Reaction Engineering , Newport Beach, California, September, 1998.

  11. Ray, Ajay K., Design of a Novel Reactor for Kinetic Studies of Semiconductor Photocatalysis , to be presented at AIChE Annual Meeting, Dallas, Texas, USA, November 1999.

  12. Ray, Ajay K., Multiobjective optimization of an industrial steam reformers , to be presented at AIChE Annual Meeting, Dallas, Texas, USA, November 1999.

  13. Ray, Ajay K., Performance improvement of activated sludge wastewater treatment by non-linear natural oscillations, to be presented at AIChE Annual Meeting , Dallas, Texas, USA, November 1999.

  14. Ray, Ajay K., Modeling and multiobjective optimization of an industrial Polyethylene Phthalate reactor , to be presented at AIChE Annual Meeting, Dallas, Texas, USA, November 1999.

  15. Ray, Ajay K., Multiobjective optimization of steam reformer performance using genetic algorithm , to be presented at AIChE Annual Meeting, Dallas, Texas, USA, November 1999.

  16. Kabir, M. F. and Ray, Ajay K., Developing a new heterogeneous photocatalytic reactor using CFD , 16th Canadian Symposium on Catalysis, 23-26 May, 2000, Banff, Alberta, Canada.

  17. Ray, Ajay K., Effect of mass transfer and catalyst layer thickness on photocatalytic degradation of benzoic acid , presented at the 3rd International Symposium on Catalysis in Multiphase Reactors, 29-31 May 2000, Naples, Italy.

  18. Ray, Ajay K., Multi-objective optimization of membrane separation modules using genetic algorithm , presented at 14th International Congress of Chemical and Process Engineering (CHISA 2000), 27-31 August 2000, Prague, Czech Republic.

  19. Ray, Ajay K., Development of a new heterogeneous photocatalytic reactor using CFD , presented at 14th International Congress of Chemical and Process Engineering (CHISA 2000), 27-31 August 2000, Prague, Czech Republic.

  20. Ray, Ajay K., Multi-objective optimization of industrial steam reforming process using genetic algorithm for efficient operation , presented at 14th International Congress of Chemical and Process Engineering (CHISA 2000), 27-31 August 2000, Prague, Czech Republic.

  21. Ray, Ajay K., Effect of mass transfer and catalyst layer thickness on photocatalytic degradation of benzoic acid , presented at 14th International Congress of Chemical and Process Engineering (CHISA 2000), 27-31 August 2000, Prague, Czech Republic.

  22. Ray, Ajay K., Modeling and multi-objective optimization of an industrial wiped-film poly(Ethylene terephthalate) reactor , presented at 14th International Congress of Chemical and Process Engineering (CHISA 2000), 27-31 August 2000, Prague, Czech Republic.

  23. Ray, Ajay K., Removal and recovery of toxic metal ions from wastewater by semiconductor photocatalysis , presented at 14th International Congress of Chemical and Process Engineering (CHISA 2000), 27-31 August 2000, Prague, Czech Republic.

  24. Ray, Ajay K., Multi-objective optimization of industrial hydrogen plants , presented at International Symposium on Chemical Reaction Engineering (ISCRE16), September 10-13, 2000, Cracow, Poland.

  25. Ray, Ajay K., Removal of toxic metal ions from wastewater by semiconductor photocatalysis , presented at International Symposium on Chemical Reaction Engineering (ISCRE16), September 10-13, 2000, Cracow, Poland.

  26. Ray, Ajay K., Applications of simulated countercurrent moving bed chromatographic reactor for MTBE synthesis , presented at AIChE Annual Conference, Los Angeles, November, 2000.

  27. Ray, A. K., Multi-objective optimization of simulated moving bed reactor , presented at the 8th Chemical Reaction Engineering Conference, Barga, Italy, June, 2001.

  28. Ray, Ajay K., Taylor vortex photocatalytic reactor for water purification , presented at the 6th International Conference on TiO2 photocatalytic purification and treatment of water and air, Niagara Falls, Ontario, Canada, June, 2001.

  29. Ray, Ajay K., Major challenges in the development of large-scale photocatalytic reactors for water purification , Ultrapure Water Asia 2002, 14-15 August, 2002, Grand Hyatt, Singapore.

  30. Ray, Ajay K, Multiobjective optimization of simulated counter-current moving bed reactor and its modification , 17th International Symposium on Chemical Reaction Engineering (ISCRE17), August 25-28, 2002, Hong Kong.

  31. Ray, Ajay K, Performance enhancement of a chemical reactor utilizing flow instability, 17th International Symposium on Chemical Reaction Engineering (ISCRE17), August 25-28, 2002, Hong Kong.

  32. Ray, Ajay K, Germinating seed problem: Approach to chemical engineering education, 2nd Symposium on teaching and learning in higher education, 4-6 September, National University of Singapore, 2002.

  33. Ray, Ajay K., Optimal design of reactive SMB, Process Innovation and Process Intensification, September 8-13, 2002, Edinburgh, Scotland.

  34. Ray, Ajay K., “Performance improvement of photocatalytic reactor using flow instability”, Process Innovation and Process Intensification”, September 8-13, 2002, Edinburgh, Scotland.

  35. Ray, Ajay K., “Design and development of photocatalytic reactor using flow instability”, First Regional conference on ultraviolet technologies for water and wastewater treatment, 31 October -1 November, 2002, Sewissotel, Singapore.

  36. Ray, A. K., “Multi-Objective Optimization of Ethylene Reactor Using Non-Dominated Sorting Genetic Algorithm I and II”, Regional Symposium on Chemical Engineering, Petaling Jaya, Malaysia, 28-30 October 2002.

  37. Ray, Ajay K., Wongso, F. and Hidajat, K., Application of multiobjective optimization in the design of chiral drug separators based on SMB Technology, 1-4 June, Lappeenranta, Finland, 2003.

  38. Ray, Ajay K., Application of Non-dominated Sorting Genetic Algorithms for Multi-objective Optimization of an Industrial Styrene Reactor, International Conference on Computational Intelligence, Robotics and Autonomous Systems (CIRAS 2003) December 15-18, Singapore, 2003.

  39. Ray, Ajay K., Optimal Design of Reactive Simulated Moving Bed and Varicol Systems , 8th International Symposium on Process Systems Engineering, 5-10 January, Kunming, China, 2004.

  40. Ray, Ajay K., Experimental Investigation of Taylor vortex photocatalytic reactor for water purification, Ultrapure Water Asia 2004, 10-11 March, Singapore, 2004.

  41. Ray, Ajay K., Optimal Design and Operation of SMB Bioreactor: Production of High Fructose Syrup by Isomerization of Glucose, 18th International Symposium of Chemical Reaction Engineering, 6-9 June, Chicago, 2004.

  42. Ray, Ajay K., Experimental Investigation of Taylor Vortex Photocatalytic Reactor for Water Purification, 18th International Symposium of Chemical Reaction Engineering, 6-9 June, Chicago, 2004.

  43. Ray, Ajay K., Experimental Investigation of Taylor Vortex Photocatalytic Reactor for Water Purification, Canadian Chemical Engineering Conference, October, Toronto, 2005.

  44. Ray, Ajay K., Optimal Design and Operation of SMB Bioreactor: Production of High Fructose Syrup by Isomerization of Glucose, Canadian Chemical Engineering Conference, October, Toronto, 2005.

  45. Ray, Ajay K., Application of Multiobjective Optimization in the design of SMB systems, 1st International Conference on Natural Resources Engineering and Technology, Putrajaya, Malaysia, 24-25 July, 2006.

  46. Ray, Ajay K., “Taylor Vortex Photocatalytic Reactor”, Canadian chemical Engineering Conference, October, Sherbrooke, 2006.

  47. Ray, Ajay K., “Multiobjective optimization of industrial wiped-film polyethylene terephthalate reactor”, Canadian Chemical Engineering Conference, October, Sherbrooke, 2006.

  48. Ray, Ajay K., “Optimization of Reactive SMB for Fructose Production”, Canadian Chemical Engineering Conference, October, Sherbrooke, 2006.

  49. Ray, Ajay K., “Distinguishing kinetic regimes from transport limited regimes in photocatalysis”, Canadian Chemical Engineering Conference, October, Sherbrooke, 2006.

  50. Ray, Ajay K., “Multiobjective optimization of industrial polyethylene reactor”, AIChE Annual Meeting, November, San Francisco, 2006.

  51. Ray, Ajay K., “Multiobjective optimization of industrial reactors”, 2nd International Workshop on Mathematics in Chemical and Biochemical Kinetics and Engineering (MACKiE-2), Houston, 2007.

  52. Ray, Ajay K., “Taylor Vortex Photocatalytic Reactor”, 2nd International Workshop on Mathematics in Chemical and Biochemical Kinetics and Engineering (MACKiE-2), Houston, 2007.

  53. Ray, Ajay K., "Applications of Multi-objective Optimization in the Design of SMB Separators and Reactor-Separators", Golden Jubilee Indian Institute of Chemical Engineers Conference, December, Kolkata, India, 2007.

  54. Ray, Ajay K., “Modeling of liquid-solid circulating fluidized bed for protein recovery”, CSChE Annual conference, October 2008, Ottawa, Canada.

  55. Ray, Ajay K., “Multi-objective optimization of liquid-solid circulating fluidized bed for protein recovery”, CSChE Annual conference, October 2008, Ottawa, Canada.

  56. Ray, Ajay K., “Modeling of liquid-solid circulating fluidized bed for protein recovery”, AIChE Annual conference, November 2008, Philadelphia, USA.

  57. Ray, Ajay K., “Multi-objective optimization of liquid-solid circulating fluidized bed for protein recovery”, AIChE Annual conference, November 2008, Philadelphia, USA.

  58. Mahmoud, H and Ray, Ajay K., “Disinfection of opaque fluid using flow instability ”, 8th World Congress of Chemical Engineering, August 2009, Montreal, Canada.

  59. Chowdhury, P. and Ray, Ajay K., “Dye-sensitized photocatalysis for hydrogen production”, 8th World Congress of Chemical Engineering, August 2009, Montreal, Canada.

  60. Zhang, Y. and Ray, Ajay K., “Hybrid SMB-Crystallizer for chiral drug purification”, 8th World Congress of Chemical Engineering, August 2009, Montreal, Canada.

  61. Mukherjee, D. and Ray, Ajay K., “Band-Engineered photocatalysis for degradation of pharmaceutical pollutants ”, 8th World Congress of Chemical Engineering, August 2009, Montreal, Canada.

  62. Ray, Ajay K., “Green Process Engineering: A New Undergraduate Program at Western ”, 8th World Congress of Chemical Engineering, August 2009, Montreal, Canada.

  63. Ray, Ajay K., “Hydrogen by water splitting from dye-sensitized photocatalysis ”, 2010 Canadian Annual Conference of Chemical Engineering (CSChE), October 2010, Saskatoon, Canada.

Other Publications

  1. Ray, Ajay K., “Water Purification by Semiconductor Photocatalytic Process”, The Environmental Technology Enterprise News, NUS, No. 2, November 1996.

  2. Ray, Ajay K., “Numerical Simulation of Photocatalytic Reactors on a Distributive Computing Environment”, Research News, NUS, Vol. 12, No. 2, August 1997.

  3. Ray, Ajay K., “Design of a Heterogeneous Photocatalytic Reactor for Waste Water Treatment”, SVU Link, NUS, Vol. 1, No. 1, May 1999.

  4. Ray, Ajay K., “Design of Large-scale Photocatalytic Reactors for Water Treatment”, Research News, NUS, Vol. 14, No. 3, August 1999.

  5. Ray, Ajay K., “Multiobjective Optimization of Industrial Hydrogen Plant”, Research News, NUS, Vol. 14, No. 5, November 1999.

  6. Ray, Ajay K., “From wastewater to potable water”, Campus News, NUS, No. 140, February 2000.

  7. Ray, Ajay K., "Novel photocatalytic reactors for large-scale water purification", Innovation, NUS, Vol. 2, No. 2, June, 2001.

  8. Ray, Ajay K., “Removal of aqueous Cr(VI) by photocatalysis”, Research News, NUS, Vol. 18, No. 1, February 2003.

  9. Ray, Ajay K., “A photocatalytic reactor for water purification”, Research News, NUS, Vol. 18, No. 3, October 2003.

  10. Ray, Ajay K., “Multiobjective optimization of chemical reactors and processes”, Research News, NUS, Vol. 18, No. 3, October 2003.