Effect of (Si plus Al)/CTAB ratio on crystal size of mesoporous ZSM-5 structure over methanol-to-olefin reactions

被引：23

作者：

Jiang, Yuan ^{[1
]}

Wang, Yuelun ^{[1
]}

Zhao, Weiming ^{[1
]}

Huang, Jun ^{[1
]}

Zhao, Yunpeng ^{[1
]}

Yang, Guoshuai ^{[1
]}

Lei, Yifan ^{[1
]}

Chu, Ruizhi ^{[1
]}

机构：

[1] China Univ Min & Technol, Minist Educ, Key Lab Coal Proc & Efficient Utilizat, Sch Chem Engn, Xuzhou 221116, Jiangsu, Peoples R China

来源：

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS | 2016年 / 61卷

基金：

中国国家自然科学基金;

关键词：

Mesoporous ZSM-5; MTO; Crystal size; Diffusion; COKE FORMATION; ZEOLITE; CONVERSION; CATALYSTS; HYDROCARBONS; DEHYDRATION; PERFORMANCE; SAPO-34; MFI; TEMPERATURE;

D O I：

10.1016/j.jtice.2015.12.017

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Mesoporous ZSM-5 catalysts were prepared with different (Sid-A1)/CTAB (cetyltrimethylammonium bromide) molar ratios and their applications in methanol-to-olefin (MTO) reactions were studied at various reaction conditions. It was found that methanol conversion and selectivity to light olefins showed a volcano-type dependency on (Si+Al)/CTAB molar ratios. The highest initial methanol conversion and selectivity of light olefins, catalyst stability were obtained over (Sid-AI)/CTAB molar ratio of 15 due to its moderate crystal size with hierarchical structure. A higher C-3=/C-2= ratio was obtained over mesoporous ZSM-5 catalysts, which was ascribed to high Si/Al ratio and low diffusion hindrance of hierarchical structure. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：234 / 240

页数：7

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