文献类型：期刊文献

英文题名：Examination of key factors determining the catalytic performance of Zn-Ga/HZSM-5 bifunctional catalysts and establishment of reaction network in alkylation of benzene with carbon dioxide

作者：Zhao, Yitao[1];Cheng, Junjun[1];Zhang, Peng[1];Liu, Xinhui[1];Zhuang, Jianguo[1];Yu, Yijun[1];Zhao, Qichao[1];Wang, Yuchen[1];Zhu, Xuedong[1];Yang, Fan[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：643

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;EI(收录号：20223112457149);WOS:【SCI-EXPANDED(收录号:WOS:000844594800006)】；

基金：The authors are grateful for the financial support from National Natural Science Foundation of China (21776076) and the Fundamental Research Funds for the Central Universities (JKA01211710) . The au- thors also thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterizations.

语种：英文

外文关键词：Benzene; CO2 hydrogenation; Alkylation; Bifunctional catalysts; Reaction network

摘要：Alkylation of benzene with carbon dioxide (CO2) is significant for converting greenhouse gas and surplus benzene into value-added toluene and xylene. Herein, a bifunctional catalyst comprising Zn/Ga oxides and HZSM-5 zeolite was developed to efficiently promote the methylation of benzene with CO2 and H-2. This catalytic system exhibited excellent performance at 425 ? and 3.0 MPa, through which benzene conversion of 39.1% and total xylene/toluene selectivity of 92.7% have been achieved. Furthermore, the catalysts are carefully characterized; compositions of Zn/Ga oxides and Si/Al ratios of HZSM-5 zeolite are recognized as decisive factors for reaction activity and selectivity respectively. Additionally, primary reaction pathways are explored and testified to provide detailed understanding for the establishment of reaction networks, especially for mechanisms of eth-ylbenzene evolution. These findings are able to provide more deep insights into the process of benzene alkyl-ation, which further facilitates the emergence of effective catalysts with potential industrial applications.