Low temperature water-gas shift reaction over alkali metal promoted cobalt carbide catalysts

Muthu Kumaran Gnanamani; Gary Jacobs; Wilson D. Shafer; Dennis E. Sparks; Shelley Hopps; Gerald A. Thomas; Burtron H. Davis

doi:10.1007/s11244-013-0219-7

Low temperature water-gas shift reaction over alkali metal promoted cobalt carbide catalysts

Muthu Kumaran Gnanamani, Gary Jacobs, Wilson D. Shafer, Dennis E. Sparks, Shelley Hopps, Gerald A. Thomas, Burtron H. Davis

Center for Applied Energy Research (CAER)

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	612-618
Number of pages	7
Journal	Topics in Catalysis
Volume	57
Issue number	6-9
DOIs	https://doi.org/10.1007/s11244-013-0219-7
State	Published - Apr 2014

Keywords

Alkali promoter
Catalyst stability
Cobalt carbide
Low temperature water-gas shift
X-ray diffraction

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1007/s11244-013-0219-7

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title = "Low temperature water-gas shift reaction over alkali metal promoted cobalt carbide catalysts",

abstract = "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.",

keywords = "Alkali promoter, Catalyst stability, Cobalt carbide, Low temperature water-gas shift, X-ray diffraction",

author = "Gnanamani, {Muthu Kumaran} and Gary Jacobs and Shafer, {Wilson D.} and Sparks, {Dennis E.} and Shelley Hopps and Thomas, {Gerald A.} and Davis, {Burtron H.}",

year = "2014",

month = apr,

doi = "10.1007/s11244-013-0219-7",

language = "English",

volume = "57",

pages = "612--618",

number = "6-9",

}

TY - JOUR

T1 - Low temperature water-gas shift reaction over alkali metal promoted cobalt carbide catalysts

AU - Gnanamani, Muthu Kumaran

AU - Jacobs, Gary

AU - Shafer, Wilson D.

AU - Sparks, Dennis E.

AU - Hopps, Shelley

AU - Thomas, Gerald A.

AU - Davis, Burtron H.

PY - 2014/4

Y1 - 2014/4

N2 - 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.

AB - 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.

KW - Alkali promoter

KW - Catalyst stability

KW - Cobalt carbide

KW - Low temperature water-gas shift

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=84898019095&partnerID=8YFLogxK

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U2 - 10.1007/s11244-013-0219-7

DO - 10.1007/s11244-013-0219-7

M3 - Article

AN - SCOPUS:84898019095

SN - 1022-5528

VL - 57

SP - 612

EP - 618

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 6-9

ER -

Low temperature water-gas shift reaction over alkali metal promoted cobalt carbide catalysts

Abstract

Keywords

ASJC Scopus subject areas

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