Dehydrogenation of ethylbenzene to styrene over LaVOx/SBA-15 catalysts in the presence of carbon dioxide

被引：65
|
作者：
Liu, B. S. [1 ]
Rui, G. [1 ]
Chang, R. Z. [1 ]
Au, C. T. [2 ,3 ]
机构：
[1] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China
[2] Hong Kong Baptist Coll, Dept Chem, Kowloon, Hong Kong, Peoples R China
[3] Hong Kong Baptist Coll, Ctr Surface Anal & Res, Kowloon, Hong Kong, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2008年 / 335卷 / 01期
关键词：
dehydrogenation of ethylbenzene; CO2 as oxidant; SBA-15; carbon deposition; vanadium oxide; lanthanum promoters;
D O I：
10.1016/j.apcata.2007.11.013
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：
The catalytic performance of a series of LaVOx/SBA-15 catalysts with different vanadium loadings was investigated for the dehydrogenation of ethylbenzene to styrene using CO2 as oxidant. The addition of La3+ has an effect of hindering carbon deposition and enhancing the stability of the catalysts. The 10%La2O3-15%V2O5/SBA-15 (wt%) catalyst exhibited the best activity and stability, giving a styrene yield of 74%. According to the results of characterization, the good performance of the catalyst could be related to the mono-dispersion of the VO43- species and the synergistic action of lanthanum and vanadium. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：88 / 94
页数：7
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