文献类型：期刊文献

英文题名：Free-Mercury Catalytic Acetylene Hydrochlorination Over Bimetallic Au-Bi/γ-Al2O3:A Low Gold Content Catalyst

作者：Zhao, Jigang[1];Cheng, Xiaoguang[1];Wang, Lei[1,2];Ren, Ruofan[2];Zeng, Junjian[1];Yang, Henghua[2];Shen, Benxian[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Tianjin Dagu Chem Co Ltd, Tianjin 300455, Peoples R China

年份：2014

卷号：144

期号：12

起止页码：2191

外文期刊名：CATALYSIS LETTERS

收录：;EI(收录号：20144300122075);WOS:【SCI-EXPANDED(收录号:WOS:000345843700024)】；

基金：We are grateful to the Fundamental Research Funds for the Central Universities (No. WA1214003) and the Technology Development Funds for the Tanggu of Binhai New Area, Tianjin, China (No. 2012STHB04-01).

语种：英文

外文关键词：Acetylene hydrochlorination; Low gold; Support; gamma-Al2O3; Deactivition

摘要：Gold and gold-based bimetallic catalysts for acetylene hydrochlorination were prepared with HAuCl(4)aEuro cent 4H(2)O and BiCl3 as precursors and gamma-Al2O3 as the support. Their catalytic performances for acetylene hydrochlorination were tested in a fixed-bed reactor under the fixed reaction conditions of temperature 150 A degrees C, C2H2 hourly space velocity 120 h(-1), feed volume ratio V (HCl)/V (C2H2) = 1.05. Then they were analyzed by the characterization methods of BET, XRD, SEM, TG, TPR and XPS. The results showed that the Au/gamma-Al2O3 catalyst exhibited a high activity with only 0.1 wt% Au loading but it deactivated easily for both coke deposition and valance change. With the addition of Bi, it inhibited the reduction of Au3+ to Au-0 in both the preparation and the reaction process. Besides, the coke deposition was apparently weakened. The best catalytic performance was obtained over 0.1Au5Bi/gamma-Al2O3 catalyst with an acetylene conversion of 96 % and a selectivity to VCM of more than 99 % (Au loading, only 0.1 wt%) for running more than 10 h. The Au-Bi/gamma-Al2O3 catalyst can decrease significantly the Au loading from more than 1 to 0.1 wt% with the satisfied acetylene conversion compared with the activity carbon support. The addition of Bi can inhibited the reduction of Au3+ and coke deposition.