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

Journal Article · · Applied Catalysis. A, General
 [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)
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.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); USDOE Office of Fossil Energy and Carbon Management (FECM); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1402495
Alternate ID(s):
OSTI ID: 1549894
Journal Information:
Applied Catalysis. A, General, Journal Name: Applied Catalysis. A, General Journal Issue: C Vol. 547; ISSN 0926-860X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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