Fischer-Tropsch synthesis: Cobalt particle size and support effects on intrinsic activity and product distribution

被引：302

作者：

Borg, Oyvind ^{[1
]}

Dietzel, Pascal D. C. ^{[2
]}

Spjelkavik, Aud I. ^{[2
]}

Tveten, Erik Z. ^{[3
]}

Walmsley, John C. ^{[4
]}

Diplas, Spyridon ^{[2
]}

Eri, Sigrid ^{[1
]}

Holmen, Anders ^{[3
]}

Ryttera, Erling ^{[1
,3
]}

机构：

[1] StatoilHydro Technol Ctr Trondheim, NO-7005 Trondheim, Norway

[2] SINTEF Mat & Chem, NO-0314 Oslo, Norway

[3] Norwegian Univ Sci & Technol, Dept Chem Engn, NO-7491 Trondheim, Norway

[4] SINTEF Mat & Chem, NO-7465 Trondheim, Norway

来源：

JOURNAL OF CATALYSIS | 2008年 / 259卷 / 02期

关键词：

Fischer-Tropsch synthesis; Cobalt; Alumina; Particle size; C5+ selectivity;

D O I：

10.1016/j.jcat.2008.08.017

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 influence of cobalt particle size in the range 3 to 18 nm on the Fischer-Tropsch synthesis intrinsic activity and product distribution was investigated over 26 alumina (gamma-Al2O3 and alpha-Al2O3) supported catalysts. A volcano-like curve was obtained for the gamma-Al2O3 based catalysts when the C5+ selectivity was plotted as a function of the particle size. The maximum selectivity was located at 7-8 nm. This is the first time an optimum particle size has been identified. An apparent optimum size was also discovered for the series of alpha-Al2O3 based catalysts. Interestingly, the C5+ selectivity of the alpha-Al2O3 based catalysts was higher than the selectivity of the gamma-Al2O3 based catalysts at all particle sizes. Thus, the selectivity is related both to the particle size and the support. No relation was observed between the cobalt particle size and the cobalt site-time yield. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：161 / 164

页数：4

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