Benzene alkylation with methanol over phosphate modified hierarchical porous ZSM-5 with tailored acidity

doi:10.1016/j.cjche.2016.12.005

›› 2017, Vol. 25 ›› Issue (9): 1187-1194.DOI: 10.1016/j.cjche.2016.12.005

• Catalysis, kinetics and reaction engineering • Previous Articles Next Articles

Benzene alkylation with methanol over phosphate modified hierarchical porous ZSM-5 with tailored acidity

Jinghui Lyu^1,3, Hualei Hu¹, Carolyn Tait², Jiayao Rui¹, Caiyi Lou¹, Qingtao Wang¹, Wenwen Han¹, Qunfeng Zhang¹, Zhiyan Pan³, Xiaonian Li¹

1 Industrial Catalysis Institute of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310032, China;
2 Department of Chemical and Biochemical Engineering, University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B9, Canada;
3 Department of Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China

Received:2016-09-01 Revised:2016-12-10 Online:2017-10-11 Published:2017-09-28
Supported by:
Supported by the National Natural Science Foundation of China (21476207, 21506189) and Zhejiang Postdoctoral Research Funded Projects (BSH1502147).

Benzene alkylation with methanol over phosphate modified hierarchical porous ZSM-5 with tailored acidity

Jinghui Lyu^1,3, Hualei Hu¹, Carolyn Tait², Jiayao Rui¹, Caiyi Lou¹, Qingtao Wang¹, Wenwen Han¹, Qunfeng Zhang¹, Zhiyan Pan³, Xiaonian Li¹

1 Industrial Catalysis Institute of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310032, China;
2 Department of Chemical and Biochemical Engineering, University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B9, Canada;
3 Department of Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China

通讯作者: Xiaonian Li,E-mail:xnli@zjut.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (21476207, 21506189) and Zhejiang Postdoctoral Research Funded Projects (BSH1502147).

Abstract

Abstract: The acidity and acid distribution of hierarchical porous ZSM-5 were tailored via phosphate modification. The catalytic results showed that both benzene conversion and selectivity of toluene and xylene increased with the presence of appropriate amount of phosphorus. Meanwhile, side reactions such as methanol to olefins related with the formation of by-product ethylbenzene formation and isomerization of xylene to meta-xylene were suppressed efficiently. The acid strength and sites amount of Brönsted acid of the catalyst were crucial for improving benzene conversion and yield of xylene, whereas passivation of external surface acid sites played an important role in breaking thermodynamic equilibrium distribution of xylene isomers.

Key words: Hierarchical porous ZSM-5, Phosphate modification, Benzene alkylation with methanol, Xylene

摘要： The acidity and acid distribution of hierarchical porous ZSM-5 were tailored via phosphate modification. The catalytic results showed that both benzene conversion and selectivity of toluene and xylene increased with the presence of appropriate amount of phosphorus. Meanwhile, side reactions such as methanol to olefins related with the formation of by-product ethylbenzene formation and isomerization of xylene to meta-xylene were suppressed efficiently. The acid strength and sites amount of Brönsted acid of the catalyst were crucial for improving benzene conversion and yield of xylene, whereas passivation of external surface acid sites played an important role in breaking thermodynamic equilibrium distribution of xylene isomers.

关键词: Hierarchical porous ZSM-5, Phosphate modification, Benzene alkylation with methanol, Xylene

Jinghui Lyu, Hualei Hu, Carolyn Tait, Jiayao Rui, Caiyi Lou, Qingtao Wang, Wenwen Han, Qunfeng Zhang, Zhiyan Pan, Xiaonian Li. Benzene alkylation with methanol over phosphate modified hierarchical porous ZSM-5 with tailored acidity[J]. , 2017, 25(9): 1187-1194.

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Benzene alkylation with methanol over phosphate modified hierarchical porous ZSM-5 with tailored acidity

Benzene alkylation with methanol over phosphate modified hierarchical porous ZSM-5 with tailored acidity

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