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

Abstract

Ga- and In-modified ceria (Ce 0.8Ga 0.2O 2, Ce 0.8In 0.2O 2) 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 H 2-TPR-XANES showed that adding of Ga or In to ceria increases the fraction of Ce 3+ in the surface shell for both unpromoted and Ag-promoted catalysts in the range of temperature typical of catalyst activation. In conclusion, this partially reduced ceria plays an important role in controlling the product selectivity of cobalt-catalyzed FT synthesis.

Authors:
 [1];  [2];  [1];  [1];  [3];  [3];  [3];  [1]
  1. Univ. of Kentucky, Lexington, KY (United States)
  2. Univ. of Kentucky, Lexington, KY (United States); Univ. of Texas at San Antonio, San Antonio, TX (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1402495
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Catalysis. A, General
Additional Journal Information:
Journal Volume: 547; Journal Issue: C; Journal ID: ISSN 0926-860X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Ag promoter; CeO2-Ga2O3; CeO2; CeO2-In2O3; Fischer-Tropsch synthesis; oxygenates

Citation Formats

Gnanamani, Muthu Kumaran, Jacobs, Gary, Shafer, Wilson D., Martinelli, Michela, Cronauer, Donald C., Kropf, A. Jeremy, Marshall, Christopher L., and Davis, Burtron H.. Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis. United States: N. p., 2017. Web. doi:10.1016/j.apcata.2017.08.026.
Gnanamani, Muthu Kumaran, Jacobs, Gary, Shafer, Wilson D., Martinelli, Michela, Cronauer, Donald C., Kropf, A. Jeremy, Marshall, Christopher L., & Davis, Burtron H.. Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis. United States. doi:10.1016/j.apcata.2017.08.026.
Gnanamani, Muthu Kumaran, Jacobs, Gary, Shafer, Wilson D., Martinelli, Michela, Cronauer, Donald C., Kropf, A. Jeremy, Marshall, Christopher L., and Davis, Burtron H.. Thu . "Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis". United States. doi:10.1016/j.apcata.2017.08.026.
@article{osti_1402495,
title = {Ga and In modified ceria as supports for cobalt-catalyzed Fischer-Tropsch synthesis},
author = {Gnanamani, Muthu Kumaran and Jacobs, Gary and Shafer, Wilson D. and Martinelli, Michela and Cronauer, Donald C. and Kropf, A. Jeremy and Marshall, Christopher L. and Davis, Burtron H.},
abstractNote = {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. In conclusion, this partially reduced ceria plays an important role in controlling the product selectivity of cobalt-catalyzed FT synthesis.},
doi = {10.1016/j.apcata.2017.08.026},
journal = {Applied Catalysis. A, General},
number = C,
volume = 547,
place = {United States},
year = {Thu Aug 24 00:00:00 EDT 2017},
month = {Thu Aug 24 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on August 24, 2018
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