The effect of Si/Al ratio on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

被引：76

作者：

Hu, Hualei ^{[1
]}

Lyu, Jinghui ^{[1
]}

Rui, Jiayao ^{[1
]}

Cen, Jie ^{[1
]}

Zhang, Qunfeng ^{[1
]}

Wang, Qingtao ^{[1
]}

Han, Wenwen ^{[1
]}

Li, Xiaonian ^{[1
]}

机构：

[1] Zhejiang Univ Technol, State Key Lab Breeding Base Green Chem Synth Tech, Ind Catalysis Inst, Hangzhou 310032, Zhejiang, Peoples R China

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2016年 / 6卷 / 08期

基金：

中国国家自然科学基金;

关键词：

ZEOLITE CATALYSTS; COKE FORMATION; METHYLATION; DEHYDRATION; CONVERSION; HZSM-5;

D O I：

10.1039/c5cy01976a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ethylbenzene is the major side product in benzene alkylation with methanol and it is difficult to be suppressed over hierarchical porous ZSM-5. Moreover, the separation of ethylbenzene from xylene still remains a great challenge. Our research indicated that ethylbenzene formation could be highly suppressed by changing the Si/Al ratio of the catalyst. Hierarchical porous ZSM-5 catalysts with different Si/Al ratios were prepared via reducing the amount of Al in the solvent evaporation assisted dry gel conversion method. In this method, tetra-n-propylammonium hydroxide was used as the direct agent to create micropores, and hexadecyltrimethoxysilane was added to create additional porosities by forming organic assemblies which occupied a certain space between zeolitic walls. The catalyst with a Si/Al ratio of 1800 could achieve high benzene conversion (59.5%) and high xylene selectivity (39.0%) as well as excellent suppression of ethylbenzene formation (<0.1%).

引用

页码：2647 / 2652

页数：6

共 25 条

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