U.S.-Korea Cooperative Research on Catalytic Decomposition of Nitric Oxide with Metal-Containing Molecular Sieves and Pillared Clays

美国休斯敦大学化学系Larry Kevan博士与韩国西江大学化学系Chong Shik Chin教授进行为期36个月的合作研究，研究改进的含金属分子筛和柱状粘土催化分解一氧化氮（NO）的方法。最初的目标是合成、表征和催化评价掺入金属离子的沸石基催化剂，用于催化分解NO。然后，将根据不同的金属离子引入方法（包括浸渍、水溶液中的离子交换、固相反应中的离子交换和化学气相沉积）来评估脱硝催化活性。第三个目标是将铜、铑、铱和其他金属离子纳入铝柱铝辉石粘土中，并评估这些材料的脱硝活性。沸石是铝硅酸盐结合形成分子大小的笼和通道，这就产生了术语“分子筛”。铝硅酸盐骨架具有净负电荷，由可交换阳离子平衡。沸石广泛用于各种催化反应，如裂化、加氢裂化和异构化。PI和韩国合作者将研究各种沸石和粘粘土去除空气污染和酸雨的主要来源——汽车尾气中的氮氧化物的效果。如果成功，他们的沸石基和近晶粘土基催化剂可能取代目前使用的昂贵的铂、铑和钯催化剂。PI和他的韩国合作者是备受尊敬的研究人员，他们在该提案的领域做出了许多重要贡献。该项目与美韩合作科学项目（U.S.- korea Cooperative Science Program）的目标相关，该项目旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作，提高美韩科学家和工程师之间的合作水平。韩国参与该项目得到了韩国科学工程财团（KOSEF）的支持。该项目为PI正在进行的研究增加了国际合作的维度。CHE-9420766，为美国研究生提供国际研究经验。* * *

9507962 Kevan This award provides funds to permit Dr. Larry Kevan, Department of Chemistry, University of Houston, to pursue with Professor Chong Shik Chin, Department of Chemistry, Sogang University, Korea, for 36 months, a program of cooperative research on the catalytic decomposition of nitric oxide (NO) with improved metal-containing molecular sieves and pillared clays. The initial objective is to synthesize, characterize, and catalytically evaluate zeolite-based catalysts with incorporated metal ions for use in the catalytic decomposition of NO. The de-NOx catalytic activity then will be assessed as a function of different methods of metal ion introduction, including impregnation, ion-exchange in aqueous solution, ion- exchange by solid state reaction, and chemical vapor deposition. The third objective is to incorporate metal ions of copper, rhodium, iridium, and others into alumina-pillared hectorite clays and to evaluate these materials for de-NOx activity. Zeolites are aluminosilicates so bonded as to form molecular-sized cages and channels which give rise to the term "molecular sieves." The aluminosilicate framework has a net negative charge which is balanced by exchangeable cations. Zeolites are used extensively for various catalytic reactions such as cracking, hydrocracking, and isomerization. The PI and his Korean collaborator will investigate the effectiveness of various zeolites and smectic clays in removing from automobile exhaust nitrogen oxides, major contributors to air pollution and acid rain. If successful, their zeolite-based and smectic clay-based catalysts might replace the expensive platinum, rhodium, and palladium catalysts presently in use. The PI and his Korean collaborator are highly respected researchers who have made a number of significant contributions in the field of this proposal. This project is relevant to the objectives of the U.S.-Korea Cooperative Science Program which seeks to increase the level of cooperation bet ween U.S. and Korean scientists and engineers through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit. Korean participation in the project is supported by the Korea Science and Engineering Foundation (KOSEF). This project adds an international cooperative dimension to the PI's ongoing research under NSF Grant No. CHE-9420766 and provides an international research experience to a U.S. graduate student. ***