文献类型：期刊文献

英文题名：The catalytic properties of K modified PtSn/Al2O3 catalyst for acetic acid hydrogenation to ethanol

作者：Zhou, Mingchuan[1];Zhang, Haitao[1];Ma, Hongfang[1];Ying, Weiyong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Minist Educ, Engn Res Ctr Large Scale Reactor Engn & Technol, Shanghai 200237, Peoples R China

年份：2016

卷号：144

起止页码：115

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：20160101763845);WOS:【SCI-EXPANDED(收录号:WOS:000371188500014)】；

语种：英文

外文关键词：PtSn catalyst; Potassium promotion; Acetic acid hydrogenation; Ethanol

摘要：Acetic acid hydrogenation catalysts based on platinum and tin supported alumina were modified by adding potassium with different loading amounts and various impregnation sequences. The modification of K caused red shift of CO adsorbed peak, decreased Pt 4d(5/2) binding energy and enhanced carbonyl group adsorption, which can promote the selectivity to ethanol. The block effect of K on acid sites was able to restrain side reaction. Further co-impregnation of Pt and Sn to K-doped support led to the poor dispersion of Pt active sites bringing about the low catalytic activity. While catalysts prepared by impregnating PtSn into K-doped alumina were not proper for acetic acid hydrogenation, but adding 0.5 wt.%K into PtSn catalyst enhanced both selectivity of ethanol from 37% to 64% and conversion of acetic acid from 88% to 93%. Further increasing potassium loading caused little change on catalytic behavior. (C) 2015 Elsevier B.V. All rights reserved.