文献类型：期刊文献

英文题名：Effect of promoters on Cu-ZnO-SiO2 catalyst for gas-phase hydrogenation of maleic anhydride to γ-butyrolactone at atmospheric pressure

作者：Yu, Yang[1];Guo, Yanglong[1];Zhan, Wangcheng[1];Guo, Yun[1];Wang, Yunsong[1];Lu, Guanzhong[1]

机构：[1]E China Univ Sci & Technol, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2014

卷号：392

起止页码：1

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

收录：;EI(收录号：20142317785110);WOS:【SCI-EXPANDED(收录号:WOS:000340227100001)】；

基金：This project was supported by National Basic Research Program of China (2013CB933201, 2010CB732300), Program for New Century Excellent Talents in University (NCET-09-0343), Shu Guang Project of Shanghai Municipal Education Commission and Shanghai Education Development Foundation (10SG30).

语种：英文

外文关键词：Maleic anhydride; gamma-Butyrolactone; Gas-phase hydrogenation; Cu-ZnO-SiO2 catalyst; Promoter

摘要：Cu-ZnO-SiO2 (CZS) catalysts, prepared by the coprecipitation method, were investigated for gas-phase hydrogenation of maleic anhydride (MA) to gamma-butyrolactone (GBL) at atmospheric pressure and characterized by XRD, N2O chemisorption, SEM and TGA. Effects of the compositions and the promoters on the catalytic performance and stability of CZS catalysts were investigated, in which CZS111 catalyst with the molar ratio of Cu:Zn:Si = 1:1:1 showed better catalytic performance and stability. The results show that the introduction of Ba as a promoter to CZS111 catalyst can further improve greatly the catalyst stability by increasing Cu surface area and ZnO dispersion with more additional adsorption sites for succinic anhydride (SA) to suppress the adsorption and polymerization of SA on the active sites of Cu. The possible reaction pathways were proposed for gas-phase hydrogenation of MA to GBL, which could explain well the effect of Ba as a promoter on the stability of CZS111 catalyst. (C) 2014 Elsevier B.V. All rights reserved.