Influence of the post-treatment of HZSM-5 zeolite on catalytic performance for alkylation of benzene with methanol

Qingtao Wang; Wenwen Han; Hualei Hu; Jinghui Lyu; Xiaolong Xu; Qunfeng Zhang; Hongjing Wang; Xiaonian Li

doi:10.1016/j.cjche.2017.03.033

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Influence of the post-treatment of HZSM-5 zeolite on catalytic performance for alkylation of benzene with methanol

第25届中国过程控制会议专栏 | Updated：2026-01-06

- Influence of the post-treatment of HZSM-5 zeolite on catalytic performance for alkylation of benzene with methanol
- Chinese Journal of Chemical Engineering Vol. 25, Issue 12, Pages: 1777-1783(2017)
- Affiliations：
  
  Institute of Industrial Catalysis of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology,Hangzhou,China,310032
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.03.033
  CLC：
- Published：2017
- Accepted：
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Qingtao Wang, Wenwen Han, Hualei Hu, Jinghui Lyu, Xiaolong Xu, Qunfeng Zhang, Hongjing Wang, Xiaonian Li. Influence of the post-treatment of HZSM-5 zeolite on catalytic performance for alkylation of benzene with methanol[J]. Chin.J.Chem.Eng., 2017, 25(12): 1777-1783.
DOI：

Qingtao Wang, Wenwen Han, Hualei Hu, Jinghui Lyu, Xiaolong Xu, Qunfeng Zhang, Hongjing Wang, Xiaonian Li. Influence of the post-treatment of HZSM-5 zeolite on catalytic performance for alkylation of benzene with methanol[J]. Chin.J.Chem.Eng., 2017, 25(12): 1777-1783. DOI： 10.1016/j.cjche.2017.03.033.

摘要

Abstract

The porousmaterialHZSM-5 zeolite with micro-mesopore hierarchical porosity was prepared by post-treatment (combined alkali treatment and acid leaching) of parent zeolite and its catalytic performance for benzene alkylation with methanol was investigated. The effect of post-treatment on the textural propertieswas characterized by various techniques (including ICP-AES

XRD

nitrogen sorption isotherms

SEM

-TPD

Py-IR and TG). The results indicated that the post-treatment could modify the structural and acidic properties of HZSM-5 zeolite. In this procedure

not only additional mesopores were created by selective extraction of silicon but also the acidity was tuned. Consequently

themodified HZSM-5 zeolite showed larger external surface areawith less acid sites as compared to the parent zeolite. Itwas found out that themodified zeolite exhibited a higher benzene conversion and xylene selectivity for alkylation of benzene with methanol as well as excellent life span of the catalyst than conventional ones. This can be explained by the facts that the presence of additional mesopores improved the diffusion property in the reactions. Furthermore

the modified zeolite showed an appropriate Brønsted acidity

for effective suppression of the side reaction of methanol to olefins

thus reduced the accumulation of coke on the HZSM-5 zeolite

whichwas favorable for the catalyst stability. In comparison with the parent HZSM-5 zeolite

themodified zeolite by alkali treatment and acid leaching showed better performance for the benzene alkylation with methanol.

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