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无粘结剂ZSM-5催化剂改性及其甲苯与乙烯择形烷基化反应的催化性能
中国石油化工股份有限公司上海石油化工研究院，绿色化工与工业催化国家重点实验室，上海 201208
Modified Binder-free ZSM-5 and Its Catalytic Performance in Shape Selective Alkylation of Toluene with Ethylene
Sinopec Shanghai Research Institute of Petrochemical Technology, State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai 201208, China
Abstract：Production of Para-ethyltoluene (p-ET) via alkylation of toluene and ethylene is considered to be an economical pathway. In this work, binder-free ZSM-5 catalysts modified by chemical liquid deposition (CLD) of polyphenylmethylsiloxane (PPMS) were studied on the physicochemical properties and the shape selective catalytic performance. Through CLD modification, the open mouth of zeolitic channel was narrowed down by SiO2 formed, and the acid sites on external surface was passivated. As a result, the non-shape-selective isomerization of p-ET to m-ET or o-ET was suppressed. And the shape selectivity of p-ET was enhanced to more than 97% over binder-free ZSM-5 with three cycles of CLD modification. Compared with modified conventionally shaped ZSM-5 with alumina, CLD modified binder-free ZSM-5 catalysts showed better alkylation activity and stability.
SHEN Zhenhao,MA Chongwei,SUN Hongmin et al. Modified Binder-free ZSM-5 and Its Catalytic Performance in Shape Selective Alkylation of Toluene with Ethylene[J]. Chemical Reaction Engineering and Technology, 2020, 36(6): 491-497.
