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Stability of the so-called “Co−Mo−S” phase in a carbonsupported Co−Mo sulfide catalyst at very low Co/Mo ratio

  • Surface Phenomena, Catalysis, Corrosion
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Abstract

Several aspects of the stability of the so-called “Co−Mo−S” phase in a fully sulfided Co(0.04)Mo(6.84)/C (wt%) catalyst have been examined by Mössbauer emission spectroscopy. The “Co−Mo−S” parameters turned out to be unchanged when the catalyst is exposed for 23 days to ambient air at room temperature. However, if this exposure to air is extended for over 100 days, the so-called “Co−Mo−S” phase was found to be oxidized to a high-spin Fe2+ phase which has no strong interaction with the “MoS2” particles. After resulfidation of the catalyst the so-called “Co−Mo−S” phase is formed again.

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Authors and Affiliations

  1. Interfacultair Reactor Instituut, Delft University of Technology, Mekelweg 15, 2629 JB, Delft, The Netherlands

    M. W. J. Crajé, E. Gerkema & A. M. Van Der Kraan

  2. Laboratory for Inorganic Chemistry and Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands

    V. H. J. De Beer

Authors
  1. M. W. J. Crajé
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  2. E. Gerkema
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  3. V. H. J. De Beer
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  4. A. M. Van Der Kraan
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Crajé, M.W.J., Gerkema, E., De Beer, V.H.J. et al. Stability of the so-called “Co−Mo−S” phase in a carbonsupported Co−Mo sulfide catalyst at very low Co/Mo ratio. Hyperfine Interact 57, 1795–1799 (1990). https://doi.org/10.1007/BF02405724

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  • DOI: https://doi.org/10.1007/BF02405724

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