Teja Thermodynamics
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Pei Yoong Koh

Graduate Student E-mail: pei.koh@chbe.gatech.edu Office: ES&T 2324 Phone: 404.894.4209 Education B.S Chemical Engineering Purdue University, West Lafayette, IN 2005
Research Interests Self-assembled Monolayers of Metal Oxide Nanostructures on Zeolite Surface Metal oxide-zeolite nanocomposites are widely employed as catalysts and adsorbents in organic syntheses, and in waste-water treatment. For example, ruthenium oxide deposited on zeolite-Y is an efficient catalyst for the photochemical reduction of water to hydrogen; and iron oxide – zeolite-Y composites exhibit high adsorption capacity for Cu2+, Cr3+, and Zn2+ which are commonly found in wastewaters from the metal-plating and tanning industries.  However, my research interest is focusing towards the application of metal-oxide nanocomposites in mixed matrix membrane for natural gas separation. Recently, a novel gas separation membrane known as mixed matrix membrane has been developed by incorporating Mg(OH)2 nanoflakes / zeolite composites in polymeric membranes via Grignard reaction. The presence of the nanoflakes significantly improves interfacial adhesion between the zeolite and the polymeric membrane, thereby increasing gas separation efficiency. The objectives of my research are as follows: To develop a more efficient and tunable aqueous deposition method for synthesizing metal oxide nanostructures on zeolite surfaces. To identify and characterize the factors that affect the growth of metal oxide nanostructures such as Mg(OH)2 nanoflakes on zeolite 4A surfaces. To measure adsorption isotherm of Mg(OH)2 on zeolite 4A and determine the optimal conditions for monolayer formation. To characterize the gas separation efficiency of the mixed matrix membrane dispersed with Mg(OH)2-zeolite 4A that is synthesized from aqueous deposition method.
Publications Amyn Teja, Pei-Yoong Koh, Synthesis, properties, and applications of magnetic iron oxide nanoparticles. Progress in Crystal Growth and Characterization of Materials. 2009, 55, 22. Pei Yoong Koh, Jason Ward, Amyn Teja, William Koros, Molecular Sieves Modified with Metal Oxide/Hydroxide Nanostructures, Provisional Patent (applied for), 2008. Presentations                                                       Pei Yoong Koh, Amyn Teja, Deposition of Metal Oxide Nanostructures on Zeolite Surfaces, Georgia Tech School of Chemical and Biomolecular Engineering Graduate Research Symposium – July 9, 2009. Pei Yoong Koh, Amyn Teja, Hydrothermal Synthesis of ZnO Nanocrystal Using Supercritical Water, Georgia Tech School of Chemical and Biomolecular Engineering Graduate Research Symposium – March 27, 2008. Pei Yoong Koh, Amyn Teja, Hydrothermal Synthesis of MgO Nanowhiskers on Zeolite Surfaces, Georgia Tech School of Chemical and Biomolecular Engineering 4th Year Colloquium – October 22, 2008. Mark J. Uline, Pei Yoong Koh, Elias I. Franses, David S. Corti, Demonstrating an Exception to Le Chatelier’s Principle with the Ammonia Synthesis Reaction: The Effects of Nonideality and a Molecular Simulation Study, American Institute of Chemical Engineers Annual Meeting – November 2, 2005.

Contact Info:
Amyn S. Teja
amyn.teja@chbe.gatech.edu
       Office: 404.894.3098
       Fax: 404.894.2866
       Office: ES&T Building 1212

Updated 7/15/2009 by Yanhui Yuan