The Development of a Macro Kinetic Model for a Commercial Co/Pt/Al2O3 Fischer-Tropsch Catalyst

被引：66

作者：

Botes, F. Gideon ^{[1
]}

van Dyk, Braam ^{[1
]}

McGregor, Craig ^{[1
]}

机构：

[1] Sasol Technol, R&D Div, ZA-1947 Sasolburg, South Africa

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2009年 / 48卷 / 23期

关键词：

COBALT-BASED CATALYSTS; SUPPORTED COBALT; CO/SIO2; CATALYST; PARTIAL-PRESSURE; WATER; SELECTIVITY; IRON; DEACTIVATION; MECHANISM;

D O I：

10.1021/ie900119z

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

An experimental study was performed with an aged Co/Pt/Al2O3 catalyst in a laboratory slurry reactor to develop a macrokinetic expression for the Fischer-Tropsch (FT) synthesis. A semiempirical model was found to be the preferred two-parameter rate equation of the reaction. However, it was shown that this model is virtually indistinguishable from a mechanistically derived three-parameter rate model that assumes the following kinetically relevant steps in the cobalt-FT synthesis: CO dissociation occurs without hydrogen interaction and is not a rate-limiting step; the first hydrogen addition to surface carbon and the second hydrogen addition to surface oxygen are the rate-determining steps.

引用

页码：10439 / 10447

页数：9

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