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A Refinement on the Notion of Type I and II (Co)MoS Phases in Hydrotreating Catalysts

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Abstract

The influence of Mo content on thiophene hydrodesulfurization for alumina- and carbon-supported (Co)Mo catalysts is investigated by TPR, XPS and H2-D2 equilibration. Activity trends for alumina-supported catalysts are explained by a gradual change of the type I MoS2 active phase from a large to a small number of Mo-O-Al anchors. A pure type II phase without such anchors and a high HDS activity is only obtained employing chelating ligands or a carbon support. At low Mo loading a separate oxysulfidic Mo species in strong interaction with alumina exhibits an unexpectedly high HDS activity, which, however, is difficult to promote by Co.

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Authors and Affiliations

  1. Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands

    E.J.M. Hensen, V.H.J. de Beer, J.A.R. van Veen & R.A. van Santen

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  1. E.J.M. Hensen
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  2. V.H.J. de Beer
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  3. J.A.R. van Veen
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  4. R.A. van Santen
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Hensen, E., de Beer, V., van Veen, J. et al. A Refinement on the Notion of Type I and II (Co)MoS Phases in Hydrotreating Catalysts. Catalysis Letters 84, 59–67 (2002). https://doi.org/10.1023/A:1021024617582

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