文献类型：期刊文献

英文题名：Simultaneously Enhanced Stability and Selectivity for Propene Epoxidation with H2 and O2 on Au Catalysts Supported on Nano-Crystalline Mesoporous TS-1

作者：Feng, Xiang[1];Sheng, Nan[1];Liu, Yibin[1];Chen, Xiaobo[1];Chen, De[3];Yang, Chaohe[1];Zhou, Xinggui[2]

机构：[1]China Univ Petr, Sch Chem Engn, State Key Lab Heavy Oil Proc, Qingdao 266530, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2017

卷号：7

期号：4

起止页码：2668

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20172203710418);WOS:【SCI-EXPANDED(收录号:WOS:000398986700051)】；

基金：This work is supported by the Natural Science Foundation of China (21606254, 21476263); Natural Science Foundation of Shandong Province (ZR2016BB16); Joint Funds of petrochemical industry (U1462205); Special Grade of China Postdoctoral Science Foundation (2016T90657); China Postdoctoral Science Foundation (2015M582160); Postdoctoral Innovation Project of Shandong (201601011); and the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-15C04).

语种：英文

外文关键词：propene epoxidation; stability; selectivity; mass transfer; Au/TS-1

摘要：It is a challenging task to design efficient Au/Ti-containing catalysts for propene epoxidation with H-2 and O-2 that simultaneously achieve high catalytic stability and selectivity to propylene oxide (PO): This contribution first describes the synthesis of a nanocrystalline mesoporous titanium silicalite-1 (MTS-1) by dry-gel conversion that employs cheap triblock copolymers as template. Compared with TS-1, MTS-1 has a shortened reactant/product diffusion length as a result of smaller crystal size (<100 nm) and the presence of mesopores (ca. 3 nm). Surprisingly, this designed catalyst shows simultaneously improved PO selectivity over 95% as well as stability over 40 h, much better than the traditional Au/TS-1 catalyst. Moreover, the intrinsic reason for the enhanced performance is elucidated. The better mass transfer ability together with higher hydrophobicity of Au/MTS-1 results in lower coke.,weight and absence of refractory aromatic coke. In this way, the side reactions and deactivation caused by blocking of micropore are inhibited.