Effect of catalyst pore size on the catalytic performance of silica supported cobalt Fischer-Tropsch catalysts

被引：204
|
作者：
Song, DC [1 ]
Li, JL [1 ]
机构：
[1] S Cent Univ Nationalities, Key Lab Catalysis & Mat Sci, Coll Chem & Mat SCi, Wuhan 430074, Peoples R China
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2006年 / 247卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Fischer-Tropsch synthesis; cobalt; silica; pore size; particle size;
D O I：
10.1016/j.molcata.2005.11.021
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：
A series of cobalt catalysts supported on silica with different pore size were prepared by incipient wetness impregnation method. N-2 physisorption, XP-D, H-2-TPR, H-2-TPD, DRIFTS and O-2, pulse reoxidation were used to characterize the catalysts. The results showed that the pore size of the support had a significant influence on the CO3O4 Crystallite diameter, catalyst reducibility and Fischer-Tropsch activity. The larger pore could cause the CO/SiO2 to form larger CO3O4 crystallite and decreased its dispersion. Catalysts with different pore size showed different CO adsorption property. The catalysts with pore size of 6-10 nm displayed higher Fischer-Tropsch activity and higher C5+ selectivity, due to the moderate particle size and moderate CO adsorption on the catalysts. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：206 / 212
页数：7
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