Insight into the Effect of Lewis Acid of W/Al-MCM-41 Catalyst on Metathesis of 1-Butene and Ethylene

被引：11

作者：

Chen, Xiaobo ^{[1
]}

Liu, Jixia ^{[1
]}

Yan, Hao ^{[1
]}

Zhou, Xin ^{[1
]}

Yao, Shuang ^{[1
]}

Wang, Yaowei ^{[2
]}

Liang, Wei ^{[1
]}

Guo, Zhenlian ^{[2
]}

Liu, Yibin ^{[1
]}

Feng, Xiang ^{[1
]}

Jin, Xin ^{[1
]}

Yang, Chaohe ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

[2] Shandong Chambroad Petrochem Co Ltd, Binzhou 256500, Peoples R China

来源：

APPLIED CATALYSIS A-GENERAL | 2020年 / 604卷 / 604期

基金：

美国国家科学基金会;

关键词：

Metathesis; 1-Butene; Ethylene; Lewis Acid; MCM-41; OLEFIN METATHESIS; PROPENE EPOXIDATION; OXIDE CATALYSTS; TUNGSTEN; OXIDATION; ETHENE; ISOMERIZATION; PERFORMANCE; 2-BUTENE; METHANE;

D O I：

10.1016/j.apcata.2020.117772

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：

Elucidating the role of support nature of the W catalyst is of great importance for the metathesis reaction of 1-butene and ethene to propene. Herein, a series of highly dispersed W/Al-MCM-41 catalysts were prepared by impregnating W on the Al-MCM-41 supports with different Si/Al ratios. Multi-characterizations together with DFT calculations revealed that the Lewis Acid formed by framework Al could strength the interaction between W metal and Al-MCM-41 support and promote the formation of the W-(O-Si) n species, which are the main active sites in the metathesis reaction. Through the optimization of various parameters (such as Si/Al ratio, W metal loading, pretreatment atmosphere and reaction temperature), optimal 1-butene conversion (94%) and propene selectivity (81%) are obtained on the N-2-pretreated 10W/70-MCM-41 catalyst at 350 degrees C under atmospheric pressure. This work may provide some new insights for the rational design of W based catalysts in the olefin metathesis system.

引用

页数：12

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