SCI和EI收录∣中国化工学会会刊

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

• Catalysis, kinetics and reaction engineering • 上一篇    下一篇

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

Jinghui Lyu1,3, Hualei Hu1, Carolyn Tait2, Jiayao Rui1, Caiyi Lou1, Qingtao Wang1, Wenwen Han1, Qunfeng Zhang1, Zhiyan Pan3, Xiaonian Li1   

  1. 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
  • 收稿日期:2016-09-01 修回日期:2016-12-10 出版日期:2017-09-28 发布日期:2017-10-11
  • 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).

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

Jinghui Lyu1,3, Hualei Hu1, Carolyn Tait2, Jiayao Rui1, Caiyi Lou1, Qingtao Wang1, Wenwen Han1, Qunfeng Zhang1, Zhiyan Pan3, Xiaonian Li1   

  1. 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:2017-09-28 Published:2017-10-11
  • Supported by:
    Supported by the National Natural Science Foundation of China (21476207, 21506189) and Zhejiang Postdoctoral Research Funded Projects (BSH1502147).

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

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