Hyperfine Interactions

, Volume 57, Issue 1–4, pp 1801–1808 | Cite as

Mössbauer emission and absorption studies on the reduction behaviour of supported Co, Co−Mo, Fe and Fe−Mo hydrotreating catalysts

  • M. W. J. Crajé
  • R. H. Hadders
  • W. L. T. M. Ramselaar
  • E. Gerkema
  • V. H. J. De Beer
  • A. M. Van Der Kraan
Surface Phenomena, Catalysis, Corrosion

Abstract

In carbon-supported Fe−Mo catalysts an Fe−Mo alloy can be formed during reduction in H2 at 673 K. In carbon-supported Co−Mo catalysts, instead of the formation of a Co−Mo alloy segregation of metallic Co is observed.

In alumina-supported Fe and Fe−Mo catalysts, the interaction between the alumina support and the catalyst particles hinders reduction of the ions to an Fe0 phase. Most probably a surface “Fe(II)-aluminate” is formed.

Keywords

Alumina Thin Film Catalyst Particle Absorption Study Hydrotreating 

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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1990

Authors and Affiliations

  • M. W. J. Crajé
    • 1
  • R. H. Hadders
    • 1
  • W. L. T. M. Ramselaar
    • 1
  • E. Gerkema
    • 1
  • V. H. J. De Beer
    • 2
  • A. M. Van Der Kraan
    • 1
  1. 1.Interfacultair Reactor InstituutDelft University of TechnologyDelftThe Netherlands
  2. 2.Laboratory for Inorganic Chemistry and CatalysisEindhoven University of TechnologyEindhovenThe Netherlands

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