Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis

Muthu Kumaran Gnanamani; Gary Jacobs; Wilson D. Shafer; Michela Martinelli; Donald C. Cronauer; A. Jeremy Kropf; Christopher L. Marshall; Burtron H. Davis

doi:10.1016/j.apcata.2017.08.026

Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis

Muthu Kumaran Gnanamani, Gary Jacobs, Wilson D. Shafer, Michela Martinelli, Donald C. Cronauer, A. Jeremy Kropf, Christopher L. Marshall, Burtron H. Davis

Center for Applied Energy Research (CAER)

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

8 Scopus citations

Abstract

Ga- and In-modified ceria (Ce_0.8Ga_0.2O₂, Ce_0.8In_0.2O₂) materials were used as supports for cobalt-catalyzed Fischer-Tropsch synthesis (FTS). The addition of Ga to ceria was found to improve CO conversion for cobalt-catalyzed FTS, while the addition of In tended to decrease it. A similar trend was observed with the Ag-promoted cobalt/ceria catalysts. Doping of ceria with Ga or In decreased methane and increased the selectivity to olefins and alcohols for Ag-promoted cobalt/ceria. The sum of the products of olefins and alcohols for various catalysts exhibited a decreasing trend as follows: Ag-Co/Ce-Ga > Ag-Co/Ce-In > Ag-Co/Ce. Results of H₂-TPR-XANES showed that adding of Ga or In to ceria increases the fraction of Ce³⁺ in the surface shell for both unpromoted and Ag-promoted catalysts in the range of temperature typical of catalyst activation. This partially reduced ceria plays an important role in controlling the product selectivity of cobalt-catalyzed FT synthesis.

Original language	English
Pages (from-to)	115-123
Number of pages	9
Journal	Applied Catalysis A: General
Volume	547
DOIs	https://doi.org/10.1016/j.apcata.2017.08.026
State	Published - 2017

Bibliographical note

Funding Information:
The work carried out at the CAER was supported in part by funding from the Commonwealth of Kentucky . Argonne’s research was supported in part by the U.S. Department of Energy (DOE) , Office of Fossil Energy, National Energy Technology Laboratory (NETL) . The use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. MRCAT operations are supported by the Department of Energy and the MRCAT member institutions.

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Ag promoter
CeO
CeO-GaO
CeO-InO
Fischer-Tropsch synthesis
Oxygenates

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/j.apcata.2017.08.026

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@article{5b0c96187bd3407f86105e6374569e6a,

title = "Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis",

abstract = "Ga- and In-modified ceria (Ce0.8Ga0.2O2, Ce0.8In0.2O2) materials were used as supports for cobalt-catalyzed Fischer-Tropsch synthesis (FTS). The addition of Ga to ceria was found to improve CO conversion for cobalt-catalyzed FTS, while the addition of In tended to decrease it. A similar trend was observed with the Ag-promoted cobalt/ceria catalysts. Doping of ceria with Ga or In decreased methane and increased the selectivity to olefins and alcohols for Ag-promoted cobalt/ceria. The sum of the products of olefins and alcohols for various catalysts exhibited a decreasing trend as follows: Ag-Co/Ce-Ga > Ag-Co/Ce-In > Ag-Co/Ce. Results of H2-TPR-XANES showed that adding of Ga or In to ceria increases the fraction of Ce3+ in the surface shell for both unpromoted and Ag-promoted catalysts in the range of temperature typical of catalyst activation. This partially reduced ceria plays an important role in controlling the product selectivity of cobalt-catalyzed FT synthesis.",

keywords = "Ag promoter, CeO, CeO-GaO, CeO-InO, Fischer-Tropsch synthesis, Oxygenates",

author = "Gnanamani, {Muthu Kumaran} and Gary Jacobs and Shafer, {Wilson D.} and Michela Martinelli and Cronauer, {Donald C.} and Kropf, {A. Jeremy} and Marshall, {Christopher L.} and Davis, {Burtron H.}",

note = "Funding Information: The work carried out at the CAER was supported in part by funding from the Commonwealth of Kentucky . Argonne{\textquoteright}s research was supported in part by the U.S. Department of Energy (DOE) , Office of Fossil Energy, National Energy Technology Laboratory (NETL) . The use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. MRCAT operations are supported by the Department of Energy and the MRCAT member institutions. Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.apcata.2017.08.026",

language = "English",

volume = "547",

pages = "115--123",

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TY - JOUR

T1 - Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis

AU - Gnanamani, Muthu Kumaran

AU - Jacobs, Gary

AU - Shafer, Wilson D.

AU - Martinelli, Michela

AU - Cronauer, Donald C.

AU - Kropf, A. Jeremy

AU - Marshall, Christopher L.

AU - Davis, Burtron H.

N1 - Funding Information: The work carried out at the CAER was supported in part by funding from the Commonwealth of Kentucky . Argonne’s research was supported in part by the U.S. Department of Energy (DOE) , Office of Fossil Energy, National Energy Technology Laboratory (NETL) . The use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. MRCAT operations are supported by the Department of Energy and the MRCAT member institutions. Publisher Copyright: © 2017 Elsevier B.V.

PY - 2017

Y1 - 2017

N2 - Ga- and In-modified ceria (Ce0.8Ga0.2O2, Ce0.8In0.2O2) materials were used as supports for cobalt-catalyzed Fischer-Tropsch synthesis (FTS). The addition of Ga to ceria was found to improve CO conversion for cobalt-catalyzed FTS, while the addition of In tended to decrease it. A similar trend was observed with the Ag-promoted cobalt/ceria catalysts. Doping of ceria with Ga or In decreased methane and increased the selectivity to olefins and alcohols for Ag-promoted cobalt/ceria. The sum of the products of olefins and alcohols for various catalysts exhibited a decreasing trend as follows: Ag-Co/Ce-Ga > Ag-Co/Ce-In > Ag-Co/Ce. Results of H2-TPR-XANES showed that adding of Ga or In to ceria increases the fraction of Ce3+ in the surface shell for both unpromoted and Ag-promoted catalysts in the range of temperature typical of catalyst activation. This partially reduced ceria plays an important role in controlling the product selectivity of cobalt-catalyzed FT synthesis.

AB - Ga- and In-modified ceria (Ce0.8Ga0.2O2, Ce0.8In0.2O2) materials were used as supports for cobalt-catalyzed Fischer-Tropsch synthesis (FTS). The addition of Ga to ceria was found to improve CO conversion for cobalt-catalyzed FTS, while the addition of In tended to decrease it. A similar trend was observed with the Ag-promoted cobalt/ceria catalysts. Doping of ceria with Ga or In decreased methane and increased the selectivity to olefins and alcohols for Ag-promoted cobalt/ceria. The sum of the products of olefins and alcohols for various catalysts exhibited a decreasing trend as follows: Ag-Co/Ce-Ga > Ag-Co/Ce-In > Ag-Co/Ce. Results of H2-TPR-XANES showed that adding of Ga or In to ceria increases the fraction of Ce3+ in the surface shell for both unpromoted and Ag-promoted catalysts in the range of temperature typical of catalyst activation. This partially reduced ceria plays an important role in controlling the product selectivity of cobalt-catalyzed FT synthesis.

KW - Ag promoter

KW - CeO

KW - CeO-GaO

KW - CeO-InO

KW - Fischer-Tropsch synthesis

KW - Oxygenates

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U2 - 10.1016/j.apcata.2017.08.026

DO - 10.1016/j.apcata.2017.08.026

M3 - Article

AN - SCOPUS:85028548444

SN - 0926-860X

VL - 547

SP - 115

EP - 123

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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