Influence of Ru segregation on the activity of Ru-Co/γ-Al2O3 during FT synthesis:: A comparison with that of Ru-Co/SiO2 catalysts

被引：40

作者：

Song, Sang-Hoon ^{[1
]}

Lee, Sang-Bong ^{[1
]}

Bae, Jong Wook ^{[1
]}

Prasad, P. S. Sai ^{[1
]}

Jun, Ki-Won ^{[1
]}

机构：

[1] KRICT, Alternat Chem Fuel Res Ctr, Taejon 305600, South Korea

来源：

CATALYSIS COMMUNICATIONS | 2008年 / 9卷 / 13期

基金：

新加坡国家研究基金会;

关键词：

ruthenium promotion; SiO2; gamma-Al2O3; cobalt; Fischer-Tropsch synthesis;

D O I：

10.1016/j.catcom.2008.05.023

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：

gamma-Al2O3 and SiO2 supported Co catalysts, with varying amounts of Ru, were prepared and evaluated for Fischer-Tropsch synthesis (FTS). The composition of Ru for optimum activity was found to be support-dependent. The reducible Co3O4 was high in the region of 0-1.64 wt.% of Ru in Co/SiO2 Catalysts. Co/gamma-Al2O3 displayed a maximum for reducible Co species at 0.42 wt.% Ru. Segregation of Ru occurred beyond this composition decreasing the extent of reduction. Co/gamma-Al2O3 catalysts showed lower activity and olefin selectivity, in spite of higher Co dispersion, than CO/SiO2 catalysts. The catalytic performance depends on the amount of reducible Co species, which again depends upon the optimum content of Ru. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2282 / 2286

页数：5

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