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.
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页数：12
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