文献类型：期刊文献

英文题名：One-Step Alkylation of Benzene with Syngas over Non-Noble Catalysts Mixed with Modified HZSM-5

作者：Yang, Fan[1];Fang, Yuehua[1];Liu, Xiangyu[1];Li, Xiaohui[2];Muir, David[3];Maclennan, Aimee[3];Zhu, Xuedong[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[3]Canadian Light Source Inc, 44 Innovat Blvd, Saskatoon, SK S7N 2V3, Canada

年份：2019

卷号：58

期号：31

起止页码：13879

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20193307316624);WOS:【SCI-EXPANDED(收录号:WOS:000480496100008)】；

基金：This project was sponsored financially by Shanghai Postdoctoral Scientific Program (No. 14R21410400) and the National Natural Science Foundation of China (No. 2177061270).

语种：英文

外文关键词：Benzene - Alkylation - Toluene - Catalyst selectivity - Zeolites - Synthesis gas

摘要：para-Xylene is an important chemical for industry. In this work, alkylation of benzene with syngas (ABS) is carried out to prepare toluene and xylene over zinc/chromium (Zn/Cr) oxide and modified HZSM-5. The catalyst with a Zn/Cr ratio of 1.6 and 20% (wt) silicate-1 zeolite (S1) coated HZSM-5 has the best catalytic performance, exhibiting 34.4% benzene conversion and 94.7% total selectivity of toluene and xylene, with 73.2% of xylene as para-xylene. The catalyst is carefiilly characterized; results showed that the activity was enhanced by excessive zinc atoms, which would replace the surface chromium atoms, and this substitution led to more oxygen vacancies. Besides, by coating a layer of S1 on HZSM-5, the production of trimethylbenzene was suppressed and the selectivity of para-xylene among all xylene was increased, due to the coverage of zeolite surface acid sites. These findings are helpful for understanding the one-pot syngas conversion and benzene alkylation processes.