Structure-function relations in supported Ni-W sulfide hydrogenation catalysts

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55 Scopus citations

Abstract

Ni-W catalysts were prepared by impregnation of commercial γ-alumina and silica supports. The sulfidation, performed directly after drying at 100°C, yielded fully sulfided Ni-W species on both supports (SEM-EDAX, XPS, XRD). At optimal metals loading (∼50 wt% NiO + WO3, Ni/W = 2), the sulfided catalysts had similar texture (N2 adsorption) and displayed similar activity in dibenzothiophene hydrodesulfurization (DBT HDS), while the activity of the Ni-W/SiO2 catalyst in toluene hydrogenation (HYD) was six times higher than that of Ni-W/Al2O3. This is due to the more than two times higher WS2 slabs stacking number in Ni-W/SiO2 compared with Ni-W/Al2O3 (XRD, HR-TEM), yielding stronger adsorption of toluene (TPD).

Original languageEnglish
Pages (from-to)47-54
Number of pages8
JournalCatalysis Letters
Volume77
Issue number1-3
DOIs
StatePublished - 1 Dec 2001

Keywords

  • DBT hydrodesulfurization
  • Morphology
  • Ni-W-S catalyst
  • TEM
  • TPD
  • Toluene hydrogenation
  • γ-alumina and silica supports

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)

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