Fischer Tropsch synthesis: Deuterium isotopic study for the formation of oxygenates over CeO 2 supported Pt-Co catalysts

Muthu Kumaran Gnanamani; Gary Jacobs; Wilson D. Shafer; Mauro C. Ribeiro; Venkat Ramana Rao Pendyala; Wenping Ma; Burtron H. Davis

doi:10.1016/j.catcom.2012.03.028

Fischer Tropsch synthesis: Deuterium isotopic study for the formation of oxygenates over CeO ₂ supported Pt-Co catalysts

Muthu Kumaran Gnanamani
, Gary Jacobs
, Wilson D. Shafer
, Mauro C. Ribeiro
, Venkat Ramana Rao Pendyala
, Wenping Ma
, Burtron H. Davis

Center for Applied Energy Research (CAER)

Producción científica: Article › revisión exhaustiva

25 Citas (Scopus)

Resumen

The effect of deuterium on Fischer-Tropsch (FT) synthesis was investigated over a Pt promoted Co/CeO ₂ catalyst. CeO ₂ supported Pt-Co catalyst is more selective towards methane and oxygenates. H ₂-D ₂-H ₂ switching experiments suggest that the hydrogenation of CO is involved in the rate determining step (inverse isotope effect). The suppression of oxygenate formation with deuterium leads to the conclusion that common FT intermediates are responsible for the observed shift in the product spectrum. The deuterium isotopic study supports our previously proposed mechanism for the formation of alcohols in that the Co-CeO ₂ interface is involved in the catalysis, such that termination of chain growth occurs at the metal-oxide junction and involves bridging OH groups on partially reduced ceria.

Idioma original	English
Páginas (desde-hasta)	12-17
Número de páginas	6
Publicación	Catalysis Communications
Volumen	25
DOI	https://doi.org/10.1016/j.catcom.2012.03.028
Estado	Published - ago 5 2012

ASJC Scopus subject areas

Catalysis
General Chemistry
Process Chemistry and Technology

Acceder al documento

10.1016/j.catcom.2012.03.028

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title = "Fischer Tropsch synthesis: Deuterium isotopic study for the formation of oxygenates over CeO 2 supported Pt-Co catalysts",

abstract = "The effect of deuterium on Fischer-Tropsch (FT) synthesis was investigated over a Pt promoted Co/CeO 2 catalyst. CeO 2 supported Pt-Co catalyst is more selective towards methane and oxygenates. H 2-D 2-H 2 switching experiments suggest that the hydrogenation of CO is involved in the rate determining step (inverse isotope effect). The suppression of oxygenate formation with deuterium leads to the conclusion that common FT intermediates are responsible for the observed shift in the product spectrum. The deuterium isotopic study supports our previously proposed mechanism for the formation of alcohols in that the Co-CeO 2 interface is involved in the catalysis, such that termination of chain growth occurs at the metal-oxide junction and involves bridging OH groups on partially reduced ceria.",

keywords = "Ceria, Cobalt catalyst, Deuterium isotope effect, Fischer-Tropsch synthesis, Oxygenates",

author = "Gnanamani, \{Muthu Kumaran\} and Gary Jacobs and Shafer, \{Wilson D.\} and Ribeiro, \{Mauro C.\} and Pendyala, \{Venkat Ramana Rao\} and Wenping Ma and Davis, \{Burtron H.\}",

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doi = "10.1016/j.catcom.2012.03.028",

language = "English",

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TY - JOUR

T1 - Fischer Tropsch synthesis

T2 - Deuterium isotopic study for the formation of oxygenates over CeO 2 supported Pt-Co catalysts

AU - Gnanamani, Muthu Kumaran

AU - Jacobs, Gary

AU - Shafer, Wilson D.

AU - Ribeiro, Mauro C.

AU - Pendyala, Venkat Ramana Rao

AU - Ma, Wenping

AU - Davis, Burtron H.

PY - 2012/8/5

Y1 - 2012/8/5

N2 - The effect of deuterium on Fischer-Tropsch (FT) synthesis was investigated over a Pt promoted Co/CeO 2 catalyst. CeO 2 supported Pt-Co catalyst is more selective towards methane and oxygenates. H 2-D 2-H 2 switching experiments suggest that the hydrogenation of CO is involved in the rate determining step (inverse isotope effect). The suppression of oxygenate formation with deuterium leads to the conclusion that common FT intermediates are responsible for the observed shift in the product spectrum. The deuterium isotopic study supports our previously proposed mechanism for the formation of alcohols in that the Co-CeO 2 interface is involved in the catalysis, such that termination of chain growth occurs at the metal-oxide junction and involves bridging OH groups on partially reduced ceria.

AB - The effect of deuterium on Fischer-Tropsch (FT) synthesis was investigated over a Pt promoted Co/CeO 2 catalyst. CeO 2 supported Pt-Co catalyst is more selective towards methane and oxygenates. H 2-D 2-H 2 switching experiments suggest that the hydrogenation of CO is involved in the rate determining step (inverse isotope effect). The suppression of oxygenate formation with deuterium leads to the conclusion that common FT intermediates are responsible for the observed shift in the product spectrum. The deuterium isotopic study supports our previously proposed mechanism for the formation of alcohols in that the Co-CeO 2 interface is involved in the catalysis, such that termination of chain growth occurs at the metal-oxide junction and involves bridging OH groups on partially reduced ceria.

KW - Ceria

KW - Cobalt catalyst

KW - Deuterium isotope effect

KW - Fischer-Tropsch synthesis

KW - Oxygenates

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DO - 10.1016/j.catcom.2012.03.028

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AN - SCOPUS:84861569319

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VL - 25

SP - 12

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JO - Catalysis Communications

JF - Catalysis Communications

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