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

L. Vradman; M. V. Landau

doi:10.1023/A:1012743213339

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

L. Vradman, M. V. Landau

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	47-54
Number of pages	8
Journal	Catalysis Letters
Volume	77
Issue number	1-3
DOIs	https://doi.org/10.1023/A:1012743213339
State	Published - 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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title = "Structure-function relations in supported Ni-W sulfide hydrogenation catalysts",

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).",

keywords = "DBT hydrodesulfurization, Morphology, Ni-W-S catalyst, TEM, TPD, Toluene hydrogenation, γ-alumina and silica supports",

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T1 - Structure-function relations in supported Ni-W sulfide hydrogenation catalysts

AU - Vradman, L.

AU - Landau, M. V.

PY - 2001/12/1

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N2 - 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).

AB - 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).

KW - DBT hydrodesulfurization

KW - Morphology

KW - Ni-W-S catalyst

KW - TEM

KW - TPD

KW - Toluene hydrogenation

KW - γ-alumina and silica supports

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JF - Catalysis Letters

SN - 1011-372X

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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