文献类型：期刊文献

英文题名：Surfactant-assisted preparation of Cu/ZnO/Al2O3 catalyst for methanol synthesis from syngas

作者：Chu, Zheng[1,2];Chen, Haibo[2];Yu, Yang[2];Wang, Qiong[2];Fang, Dingye[1]

机构：[1]E China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Nanjing Chem Ind Grp, Res Inst, Nanjing 210048, Jiangsu, Peoples R China

年份：2013

卷号：366

起止页码：48

外文期刊名：JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

收录：;EI(收录号：20124915747874);WOS:【SCI-EXPANDED(收录号:WOS:000313230200008)】；

语种：英文

外文关键词：Methanol synthesis; Cu/ZnO/Al2O3 catalyst; Surfactant-assisted preparation; Thermal stability

摘要：Cu/ZnO/Al2O3 (CZA) catalysts were prepared by two-step precipitation method with the assistance of the surfactant, tetraethylammonium hydroxide (TEAH) or polyethylene glycol (PEG), and evaluated in methanol synthesis from syngas. Effects of input amount of the surfactant and accelerated thermally induced deactivation (ATD) on the activity of the catalyst were investigated under the reaction conditions of 230 degrees C, 5 MPa, gas hourly space velocity (GHSV) of 10,000 h(-1) and the syngas composition of CO/CO2/H-2/N-2 (volume ratio) = 15:5:70:10. Among the catalysts investigated, 2T-CZA catalyst, prepared with addition of 2 wt.% TEAH in the course of the coprecipitation of Cu2+ and Zn2+, exhibited better catalytic performance due to its smaller crystallite size of Cu and higher Cu surface area, over which methanol space-time yield (STY) was 1.26 times as heavy as that over blank CZA catalyst, prepared without any surfactant's assistance, and 1.25 times as that over commercially famous CX catalyst for methanol synthesis from syngas in China. Meanwhile, 2T-CZA catalyst showed satisfactory thermal stability, in which methanol STY decreased by only 5.2% because of growing up of crystallite size of Cu and decrease in the number of surface Cu atoms after the ATD test to be conducted in situ at 350 degrees C for 20 h in syngas. (c) 2012 Elsevier B.V. All rights reserved.