Influence of zinc state on the catalyst properties of Zn/HZSM-5 zeolite in 1-hexene aromatization and cyclohexane dehydrogenation  

作　　者：Di Gao Yibo Zhi Liyuan Cao Liang Zhao Jinsen Gao Chunming Xu Mingzhi Ma Pengfei Hao 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(Beijing),Beijing 102249,China [2]Hebei Jingzhi Technology Company Limited,Cangzhou 061000,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第3期124-134,共11页中国化学工程学报（英文版）

基　　金：the support from the National Natural Science Foundation of China(21838011)。

摘　　要：Rational design of Zn-containing HZSM-5 zeolite(Zn/HZSM-5)with high reactivity and excellent aromatization performance for olefin aromatization is crucially desired.We develop a new and uncomplicated method to synthesize Zn/HZSM-5(IMX/Z5)with superior aromatization performance in the paper.Compared to incipient wetness impregnation(IMP/Z5)and mechanical mixing(MIX/Z5),the asprepared IMX/Z5 presents a higher amount of surface ZnOH^(+)species(2.87%)while keeping identical bulk zinc content.As a result,more surface ZnOH^(+)favor both the aromatization of 1-hexene and cyclohexane dehydrogenation.For the two olefin aromatization pathways(hydrogen transfer and dehydrogenation),it is the first time found both the hydrogen transfer ability and the dehydrogenation ability increase linearly with the amount of surface ZnOH^(+)species while keeping identical bulk zinc content.We believe that the linear relationships are essential to design next generation olefin aromatization catalysts.

关 键 词：Zinc state CATALYST Catalysis Hydrogen transfer Dehydrogenation Moleclar sieves 

分 类 号：TQ426[化学工程]