Selective low-temperature removal of carbon monoxide from hydrogen-rich fuels over Cu-Ce-Al catalysts

Praveen K. Cheekatamarla; William S. Epling; Alan M. Lane

doi:10.1016/j.jpowsour.2005.01.027

Selective low-temperature removal of carbon monoxide from hydrogen-rich fuels over Cu-Ce-Al catalysts

Praveen K. Cheekatamarla, William S. Epling, Alan M. Lane

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

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Abstract

The selective oxidation of CO in the presence of excess H₂ was investigated over a ceria-promoted Cu-alumina catalyst. This catalyst shows nearly exclusive oxidation of CO versus H₂ with an O₂ concentration in stoichiometric proportion to CO, making it possible to purify a fuel cell feed stream with a minimum loss of energy content associated with H₂. The effect of the presence of CO₂ and H₂O in the feed on the activity and selectivity of the catalyst, and the long-term stability were also investigated. The catalysts were characterized by X-ray diffraction (XRD), CO chemisorption and temperature-programmed reduction (TPR). Copper is better dispersed on the ceria-promoted alumina support in comparison to alumina alone. CuO is the active phase for selective CO oxidation. Oxygen vacancies supplied and enhanced by ceria are responsible for improved activity.

Original language	English
Pages (from-to)	178-183
Number of pages	6
Journal	Journal of Power Sources
Volume	147
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jpowsour.2005.01.027
State	Published - Sep 9 2005
Externally published	Yes

Keywords

Copper catalyst
Hydrogen
PROX
Selective oxidation

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10.1016/j.jpowsour.2005.01.027

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title = "Selective low-temperature removal of carbon monoxide from hydrogen-rich fuels over Cu-Ce-Al catalysts",

abstract = "The selective oxidation of CO in the presence of excess H2 was investigated over a ceria-promoted Cu-alumina catalyst. This catalyst shows nearly exclusive oxidation of CO versus H2 with an O2 concentration in stoichiometric proportion to CO, making it possible to purify a fuel cell feed stream with a minimum loss of energy content associated with H2. The effect of the presence of CO2 and H2O in the feed on the activity and selectivity of the catalyst, and the long-term stability were also investigated. The catalysts were characterized by X-ray diffraction (XRD), CO chemisorption and temperature-programmed reduction (TPR). Copper is better dispersed on the ceria-promoted alumina support in comparison to alumina alone. CuO is the active phase for selective CO oxidation. Oxygen vacancies supplied and enhanced by ceria are responsible for improved activity.",

keywords = "Copper catalyst, Hydrogen, PROX, Selective oxidation",

author = "Cheekatamarla, {Praveen K.} and Epling, {William S.} and Lane, {Alan M.}",

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T1 - Selective low-temperature removal of carbon monoxide from hydrogen-rich fuels over Cu-Ce-Al catalysts

AU - Cheekatamarla, Praveen K.

AU - Epling, William S.

AU - Lane, Alan M.

PY - 2005/9/9

Y1 - 2005/9/9

N2 - The selective oxidation of CO in the presence of excess H2 was investigated over a ceria-promoted Cu-alumina catalyst. This catalyst shows nearly exclusive oxidation of CO versus H2 with an O2 concentration in stoichiometric proportion to CO, making it possible to purify a fuel cell feed stream with a minimum loss of energy content associated with H2. The effect of the presence of CO2 and H2O in the feed on the activity and selectivity of the catalyst, and the long-term stability were also investigated. The catalysts were characterized by X-ray diffraction (XRD), CO chemisorption and temperature-programmed reduction (TPR). Copper is better dispersed on the ceria-promoted alumina support in comparison to alumina alone. CuO is the active phase for selective CO oxidation. Oxygen vacancies supplied and enhanced by ceria are responsible for improved activity.

AB - The selective oxidation of CO in the presence of excess H2 was investigated over a ceria-promoted Cu-alumina catalyst. This catalyst shows nearly exclusive oxidation of CO versus H2 with an O2 concentration in stoichiometric proportion to CO, making it possible to purify a fuel cell feed stream with a minimum loss of energy content associated with H2. The effect of the presence of CO2 and H2O in the feed on the activity and selectivity of the catalyst, and the long-term stability were also investigated. The catalysts were characterized by X-ray diffraction (XRD), CO chemisorption and temperature-programmed reduction (TPR). Copper is better dispersed on the ceria-promoted alumina support in comparison to alumina alone. CuO is the active phase for selective CO oxidation. Oxygen vacancies supplied and enhanced by ceria are responsible for improved activity.

KW - Copper catalyst

KW - Hydrogen

KW - PROX

KW - Selective oxidation

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DO - 10.1016/j.jpowsour.2005.01.027

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JO - Journal of Power Sources

JF - Journal of Power Sources

IS - 1-2

ER -

Selective low-temperature removal of carbon monoxide from hydrogen-rich fuels over Cu-Ce-Al catalysts

Abstract

Keywords

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