Effect of the hydrogen spillover on the selectivity of dibenzothiophene hydrodesulfurization over CoSx/γ-Al2O3, NiSx/γ-Al2O3 and MoS2/γ-Al2O3 catalysts

N. Escalona, R. García, G. Lagos, C. Navarrete, PATRICIO FRANCISCO BAEZA CHANDIA, F. J. Gil-Llambías

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26 Scopus citations

Abstract

Dibenzothiophene (DBT) hydrodesulphurization (HDS) reaction at 3 MPa and 325-375 °C on Mo/γ-Al2O3 single-bed and Me/γ-Al2O3//SiO2//Mo/γ-Al2O3 (Me = Co or Ni) double-bed catalysts were investigated. Results indicate that ratio cyclohexylbenzene (CHB)/biphenyl (BP) or selectivity is higher when using double-beds rather than a single-bed. Synergy in dibenzothiophene hydrodesulphurization on Co//Mo and Ni//Mo double-beds is also detected. Changes in selectivity and conversion are attributed to the action of spillover hydrogen (Hso) formed in the first bed that reaches the second bed.

Original languageEnglish
Pages (from-to)1053-1056
Number of pages4
JournalCatalysis Communications
Volume7
Issue number12
DOIs
StatePublished - Dec 2006
Externally publishedYes

Keywords

  • Dibenzothiophene
  • Hydrodesulfurization
  • Selectivity
  • Spillover hydrogen

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