ศาสตราจารย์ ดร. ชวลิต งามจรัสศรีวิชัย
Prof. Dr. Chawalit Ngamcharussrivichai
B.Sc. (Hons)(Chem.Eng.), Chulalongkorn University, Thailand
M.Sc. (Appl.Chem.), The University of Tokyo, Japan
Ph.D. (Appl.Chem.), The University of Tokyo, Japan
E-mail : chawalit.ng@chula.ac.th
Tel : (662) 218 7528
Research Interests
Synthesis, Modification, and Surface Characterization of Zeolitic and Mesoporous Materials
Zeolites and mesoporous molecular sieves have attracted a lot of attention in several areas of research and industrial application, such as catalysis and adsorption, due to their uniquely periodic channel structures with well-defined pore sizes which insert shape-selectivity properties, and their oxide framework which can accommodate hetero-metal atoms, altering physicochemical properties to meet the application requirements. In our research unit, the zeolitic and mesoporous materials are synthesized mainly via hydrothermal method. Modification is focused on introduction of hetero-metal atoms into their oxide matrix, and functionalization of their surface via chemical grafting. FT-IR spectroscopy with study of probe molecules adsorption is applied to characterize active surface species of the materials.
Catalyst Technology
Research is aimed to develop catalysts having appropriate physicochemical properties and sufficient catalytic performance for the chemical processes such as biodiesel and fine chemicals production, gasification, and fuel cell. The relevant catalysts include metal oxides and metal-supported oxides prepared via various procedures.
Environmental Technology
As a consequence of the environmental issues, control of emission from vehicles and industrial processes became strict these days. Our attempt is to minimize toxic gases and heavy metals, which are emitted to environment during coal and liquid hydrocarbon combustion and chemical process operation. The technology is focused on low-temperature adsorption using our developed absorbents.
Biodiesel ProductionConventional biodiesel production through homogeneous base catalysis using NaOH or KOH has many drawbacks, particularly consuming a large amount of water for removing residual base and ion from biodiesel product. To minimize wastewater and reduce purification steps, we are developing technology for biodiesel production through heterogeneously catalyzed transesterification of vegetable oils with small alcohols under mild conditions at 60 – 80ºC and near 1 atm. Various acidic and basic catalysts are designed and synthesized in our laboratory. The transesterification is studied both in batch and continuous reactors.
Publications
Scopus Database: https://www.scopus.com/authid/detail.uri?authorId=21734976900
ResearchGate Database: https://www.researchgate.net/profile/Chawalit-Ngamcharussrivichai
Ketcong, A.; Meechan, W.; Naree, T.; Seneevong, I.; Winitsorn, A.; Butnark, S.; Ngamcharussrivichai, C. “Production of Fatty Acid Methyl Esters over a Limestone-Derived Heterogeneous Catalyst in a Fixed-Bed Reactor” J. Ind. Eng. Chem. 20 (2014) 1665-1671.
Nuntang, S.; Poompradub, S.; Butnark, S.; Yokoi, T.; Tatsumi, T.; Ngamcharussrivichai, C. “Novel Mesoporous Composites Based On Natural Rubber and Hexagonal Mesoporous Silica: Synthesis and Characterization” Mater. Chem. Phys. 143 (2014) 1199-1208.
Khangkham, S.; Julcour-Lebigue, C.; Damronglerd, S.; Ngamcharussrivichai, C.; Manero, M.-H.; Delmas, H. “Regeneration of Coked Zeolite from PMMA Cracking Process by Ozonation” Appl. Catal. B 140-141 (2013) 396-405.
Limmanee, S.; Naree, T., Bunyakiat, K., Ngamcharussrivichai, C. “Mixed Oxides of Ca, Mg and Zn an Heterogeneous Base Catalysts for the Synthesis of Palm Kernel Oil Methyl Esters” Chem. Eng. J. 225 (2013) 616-624.
Prarat, P.; Ngamcharussrivichai, C.; Khaodhiar, S.; Punyapalakul, P. “Removal of Haloacetonitriles in Aqueous Solution through Adsolubilization Process by Polymerizable Surfactant-Modified Mesoporous Silica” J. Hazard. Mater. 244-245 (2013) 151-159.
Suriyanon, N.; Punyapalakul, P.; Ngamcharussrivichai, C. “Mechanistic Study of Diclofenac and Carbamazepine Adsorption on Functionalized Silica-Based Porous Materials” Chem. Eng. J. 214 (2013) 208-218.
Prarat, P.; Ngamcharussrivichai, C.; Khaodhiar, S.; Punyapalakul, P. “Adsorption Characteristics of Haloacetonitriles on Functionalized Silica-Based Porous Materials in Aqueous Solution” J. Hazard. Mater. 192 (2011) 1210-2018.
Ngamcharussrivichai, C.; Meechan, W.; Ketcong, A.; Kangwansaichon, K.; Butnark, S. “Preparation of Heterogeneous Catalysts from Limestone for Transesterification of Vegetable Oils – Effects of Binder Addition” J. Ind. Eng. Chem. 17 (2011) 587-595.
Ngamcharussrivichai, C.; Nunthasanti, P.; Tanachai, S.; Bunyakiat, K. “Biodiesel Production through Transesterification over Natural Calciums” Fuel Process. Technol. 91 (2010) 1409-1415.
Yoosuk, B.; Kim, J.H.; Song, C.; Ngamcharussrivichai, C.; Prasassarakich, P. ”Effects of Preparation Conditions in Hydrothermal Synthesis of Highly Active Unsupported NiMo Sulfide Catalysts for Simultaneous Hydrodesulfurization of Dibenzothiophene and 4,6-Dimethyldibenzothiophene” Catal. Today 149 (2010) 52-61.
Punyapalakul, P; Soonglerdsongpha, S.; Kanlayaprasit, C.; Ngamcharussrivichai, C.; Khaodhiar, S. “Effects of Crystalline Structures and Surface Functional Groups on the Adsorption of Haloacetic Acids by Inorganic Materials” J. Hazard. Mater. 171 (2009) 491-499.
Benjapornkulaphong, S.; Ngamcharussrivichai, C.; Bunyakiat, K. “Al2O3-supported Alkali and Alkali Earth Oxides for Transesterification of Palm Kernel Oil and Coconut Oil” Chem. Eng. J. 145 (2009) 468-474.
Nuntang, S.; Prasassarakich, P.; Ngamcharussrivichai, C. “Comparative Study on Adsorptive Removal of Thiophenic Sulfurs over Y and USY Zeolites” Ind. Eng. Chem. Res. 47 (2008) 7405-7413.
Ngamcharussrivichai, C.; Totarat, P.; Bunyakiat, K. “Ca and Zn Mixed Oxide as a Heterogeneous Catalyst for Transesterification of Palm Kernel Oil” Appl. Catal. A 341 (2008) 77-85.
Ngamcharussrivichai, C.; Chatratananon, C.; Nuntang, S.; Prasassarakich, P. “Adsorptive Removal of Thiophene and Benzothiophene over Zeolites from Mae Moh Coal Fly Ash” Fuel 87 (2008) 2347-2351.
Yoosuk, B., Kim, H, J., Song, C., Ngamcharussrivichai, C., Prasassarakich, P. (2008) “Highly active MoS2, CoMoS2 and NiMos2 unsupported catalysts prepared by hydrothermal synthesis for hydrodesulfurization of 4,6-dimethyldibenzothiophene” Catalysis Today, 130, 14-23.
Ngamcharussrivichai, C., Imyim, A., Li, Xiaohong., and Fujimoto, K. (2007) “Active and Selective Bifunctional Catalyst for Gasoline Production through a Slurry-Phase Fischer-Tropsch Synthesis” Ind. Eng. Chem. Res, 46, 6883-6890.
Ngamcharussrivichai, C., Wiwatnimit, W., Wangnoi, S. (2007) “Modified dolomites as catalysts for palm kernel oil transesterification” Journal of Molecular Catalysis A: Chemical 276, 24-33.