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The formation of cobalt silicates on Co/SiO2 under hydrothermal conditions

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Abstract

A Co/SiO2 catalyst recovered after both gas and liquid phase Fischer-Tropsch synthesis exhibited significant decreases in the amount of reducible metal. Hydrothermal conditions similar to those occurring during Fischer-Tropsch synthesis were simulated in order to study compound formation in this Co/SiO2 catalyst. Hydrothermal treatment at 220°C led to a catalyst with lower reducibility, attributable to the formation of both reducible and nonreducible (<900°C) Co silicates. The formation of these compounds occurred only when metallic Co was present, was more pronounced in the presence of hydrogen, and was inhibited by air.

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Authors and Affiliations

  1. Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA

    Andreas Kogelbauer, Jason C. Weber & James G. Goodwin Jr.

Authors
  1. Andreas Kogelbauer
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  2. Jason C. Weber
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  3. James G. Goodwin Jr.
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Kogelbauer, A., Weber, J.C. & Goodwin, J.G. The formation of cobalt silicates on Co/SiO2 under hydrothermal conditions. Catal Lett 34, 259–267 (1995). https://doi.org/10.1007/BF00806875

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  • DOI: https://doi.org/10.1007/BF00806875

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