Low Temperature Water-Gas Shift Reaction Over Alkali Metal Promoted Cobalt Carbide Catalysts

被引：45

作者：

Gnanamani, Muthu Kumaran ^{[1
]}

Jacobs, Gary ^{[1
]}

Shafer, Wilson D. ^{[1
]}

Sparks, Dennis E. ^{[1
]}

Hopps, Shelley ^{[1
]}

Thomas, Gerald A. ^{[1
]}

Davis, Burtron H. ^{[1
]}

机构：

[1] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA

来源：

TOPICS IN CATALYSIS | 2014年 / 57卷 / 6-9期

关键词：

Low temperature water-gas shift; Cobalt carbide; Alkali promoter; Catalyst stability; X-ray diffraction; FISCHER-TROPSCH SYNTHESIS; C-H BOND; MOLYBDENUM CARBIDE; REACTION-MECHANISM; POTASSIUM; FORMATE; FACILITATE; SURFACE;

D O I：

10.1007/s11244-013-0219-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Low temperature water-gas shift (LT-WGS) was performed over various group I alkali metal (Li, Na, K, Rb, Cs) promoted cobalt carbide (Co2C) catalysts at temperatures ranging from 453 to 573 K and atmospheric pressure. Cobalt carbide (Co2C) was found to be active for the WGS reaction. The stability of the catalyst is related to the stability of the cobalt carbide phases under reaction conditions. Potassium promoted cobalt carbide catalysts exhibited higher activity and stability compared to the other alkali promoted catalysts for LT-WGS. X-ray diffraction analyses of fresh and used catalysts suggest that the origin of deactivation of the catalysts is primarily due to the chemical transition of cobalt from carbide to metal during WGS.

引用

页码：612 / 618

页数：7

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