Stable Zn@ZSM-5 catalyst via a dry gel conversion process for methanol-to-aromatics reaction

被引：18
作者：
Liu, Min [1 ]
Cui, Teng [1 ]
Guo, Xinwen [1 ]
Li, Junjie [1 ]
Song, Chunshan [1 ,2 ]
机构：
[1] Dalian Univ Technol, PSU DUT Joint Ctr Energy Res, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
[2] Penn State Univ, PSU DUT Joint Ctr Energy Res, EMS Energy Inst, Dept Energy & Mineral Engn, University Pk, PA 16802 USA
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2021年 / 312卷
基金：
中国国家自然科学基金;
关键词：
Dry gel conversion; MTA; ZSM-5; Catalyst stability; Aromatics selectivity; HZSM-5; CATALYSTS; ZSM-5; ZEOLITE H-ZSM-5; PARA-XYLENE; AROMATIZATION; HYDROCARBONS; PERFORMANCE; SIZE; CLUSTERS;
D O I：
10.1016/j.micromeso.2020.110696
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A unique synthesis route to stabilize zinc species in ZSM-5 zeolite crystals was developed. Firstly, extensive mesoporosity in ZSM-5 was obtained through alkali treatment, after which Zn nanoparticles were introduced into the hierarchical ZSM-5 by impregnation. Then the sample was mixed with SiO2-sol and shaped. Finally, the Zn-fixed ZSM-5 zeolites was obtained by dry gel conversion. By this method, zinc species can be effectively stabilized in zeolite, which can not only improve the aromatic hydrocarbons selectivity, but also increase the stability of the catalyst in the reaction of methanol to aromatics (MTA). The acidity properties and the state of zinc species were studied. It was found that the catalyst possessed more Lewis acid sites and the ratio of Zn(OH)(+)/ZnO was increased after dry gel conversion.
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页数：8
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