文献类型：期刊文献

英文题名：Boosting Size-Selective Hydrogen Combustion in the Presence of Propene Using Controllable Metal Clusters Encapsulated in Zeolite

作者：Shan, Yuling[1,2];Sui, Zhijun[1];Zhu, Yian[1];Zhou, Jinghong[1];Zhou, Xinggui[1];Chen, De[3]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Qingdao Univ Sci & Technol, Coll Chem Engn, 53 Zhengzhou Rd, Qingdao 266042, Peoples R China;[3]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2018

卷号：57

期号：31

起止页码：9770

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20183005614819);WOS:【SCI-EXPANDED(收录号:WOS:000439741900031)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 91434117 and No. 91645122) and by the Natural Science Foundation of Shandong Province, China (No. ZR2017BB014). The supports from Norwegian research council and Norwegian University of Science and Technology are highly acknowledged.

语种：英文

外文关键词：encapsulation; heterogeneous catalysis; propane dehydrogenation; selective hydrogen combustion; zeolites

摘要：A strategy is presented for making metal clusters encapsulated inside microporous solids selectively accessible to reactant molecules by manipulating molecular sieve size and affinity for adsorbed molecules. This expands the catalytic capabilities of these materials to reactions demanding high selectivity and stability. Selective hydrogen combustion was achieved over Pt clusters encapsulated in LTA zeolite (KA, NaA, CaA) in a propene-rich mixture obtained from propane dehydrogenation, showing pore-size dependent selectivity and coking rate. Propene tended to adsorb at channels or external surfaces of zeolite, interfering the diffusion of hydrogen and oxygen. Tailoring the surface of LTA zeolite with additional alkali or alkaline earth oxides contributed to narrowing zeolite pore size and their affinity for propene. The thus-modified Pt@KA catalyst displayed excellent hydrogen combustion selectivity (98.5%) with high activity and superior anti-coking and anti-sintering properties.