文献类型：期刊文献

英文题名：An Au-Cu bimetal catalyst for acetylene hydrochlorination with renewable γ-Al2O3 as the support

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

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

年份：2015

卷号：5

期号：22

起止页码：16727

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20151000600862);WOS:【SCI-EXPANDED(收录号:WOS:000349556700017)】；

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：Catalyst supports - Copper compounds - Deposition - Potassium hydroxide - Acetylene - Binary alloys - Carbon dioxide - Aluminum oxide - Temperature programmed desorption - Thermogravimetric analysis - Catalyst activity - Fourier transform infrared spectroscopy - Scanning electron microscopy - X ray photoelectron spectroscopy - Chemical activation - Alumina - Chemical reactors - Lighting - X ray diffraction

摘要：The bimetal catalyst gold(III) chloride-copper(II) chloride (AuCl3-CuCl2) was prepared with several different gamma-aluminium oxide (gamma-Al2O3) supports and its catalytic properties towards acetylene hydrochlorination were assessed in a fixed- bed reactor. The comparison indicated that one of the catalysts attained the highest activity with an acetylene conversion of 97%, which was far higher than the others. Catalysts were characterized using detailed X-ray diffraction, nitrogen-Brunauer, Emmett and Teller surface area analysis (N-2-BET), ammonia temperature-programmed desorption, Fourier-transform infrared spectroscopy and carbon dioxide temperature-programmed desorption analysis. It is proposed that the base site contributed to its high catalyst activity compared with the other catalysts, instead of the acid site or the textural properties on the support, therefore, the activity and the life of the catalysts can be improved significantly by treating the supports with potassium hydroxide. In addition, the results of N-2-BET, thermogravimetric analysis and scanning electron microscopy indicated that the catalysts deactivated rapidly because of carbon deposition, and the actual amount of coke deposition was 18.0% after the reaction. AuCl3-CuCl2/gamma-Al2O3 was easily regenerated for reuse as a catalyst by burning off in an air atmosphere for 10 min. The activity of the regenerated catalyst nearly reached the level of the fresh catalyst.