Characterization of carbon- and alumina-supported NiW and CoW sulfided catalysts

Y Van der Meer; MJ Vissenberg; VHJ De Beer; JAR Van Veen; AM Van der Kraan

doi:10.1023/A:1021211103003

Characterization of carbon- and alumina-supported NiW and CoW sulfided catalysts

Y Van der Meer^*, MJ Vissenberg, VHJ De Beer, JAR Van Veen, AM Van der Kraan

^*Corresponding author for this work

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

Abstract

Sulfided NiW and CoW catalysts supported on activated carbon and alumina were characterized with Co-57 Mossbauer emission spectroscopy (MES) and EXAFS at the W-L-III edge. NiW catalysts were studied with MES by probing the Ni atoms with 57Co. MES results demonstrate that the 'Ni-W-S' phase is present in sulfided NiW catalysts. Formation of Co9S8-type phases could be related to the lower thiophene HDS activity of CoW catalysts. WEXAFS showed that addition of Co or Ni to a W/Al2O3 catalyst results in a higher W sulfidation degree. No structural differences were found for carbon- and alumina-supported catalysts, in spite of the two times larger thiophene HDS activity of carbon- supported NiW.

Original language	English
Pages (from-to)	51-57
Number of pages	7
Journal	Hyperfine Interactions
Volume	139
Issue number	1-4
DOIs	https://doi.org/10.1023/A:1021211103003
Publication status	Published - 2002
Externally published	Yes

Keywords

CoW sulfide
Exafs
NiW sulfide
Hydrodesulfurization catalysts

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10.1023/A:1021211103003

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title = "Characterization of carbon- and alumina-supported NiW and CoW sulfided catalysts",

abstract = "Sulfided NiW and CoW catalysts supported on activated carbon and alumina were characterized with Co-57 Mossbauer emission spectroscopy (MES) and EXAFS at the W-L-III edge. NiW catalysts were studied with MES by probing the Ni atoms with 57Co. MES results demonstrate that the 'Ni-W-S' phase is present in sulfided NiW catalysts. Formation of Co9S8-type phases could be related to the lower thiophene HDS activity of CoW catalysts. WEXAFS showed that addition of Co or Ni to a W/Al2O3 catalyst results in a higher W sulfidation degree. No structural differences were found for carbon- and alumina-supported catalysts, in spite of the two times larger thiophene HDS activity of carbon- supported NiW.",

keywords = "CoW sulfide, Exafs, NiW sulfide, Hydrodesulfurization catalysts",

author = "{Van der Meer}, Y and MJ Vissenberg and {De Beer}, VHJ and {Van Veen}, JAR and {Van der Kraan}, AM",

year = "2002",

doi = "10.1023/A:1021211103003",

language = "English",

volume = "139",

pages = "51--57",

journal = "Hyperfine Interactions",

issn = "0304-3843",

publisher = "Springer",

number = "1-4",

}

TY - JOUR

T1 - Characterization of carbon- and alumina-supported NiW and CoW sulfided catalysts

AU - Van der Meer, Y

AU - Vissenberg, MJ

AU - De Beer, VHJ

AU - Van Veen, JAR

AU - Van der Kraan, AM

PY - 2002

Y1 - 2002

N2 - Sulfided NiW and CoW catalysts supported on activated carbon and alumina were characterized with Co-57 Mossbauer emission spectroscopy (MES) and EXAFS at the W-L-III edge. NiW catalysts were studied with MES by probing the Ni atoms with 57Co. MES results demonstrate that the 'Ni-W-S' phase is present in sulfided NiW catalysts. Formation of Co9S8-type phases could be related to the lower thiophene HDS activity of CoW catalysts. WEXAFS showed that addition of Co or Ni to a W/Al2O3 catalyst results in a higher W sulfidation degree. No structural differences were found for carbon- and alumina-supported catalysts, in spite of the two times larger thiophene HDS activity of carbon- supported NiW.

AB - Sulfided NiW and CoW catalysts supported on activated carbon and alumina were characterized with Co-57 Mossbauer emission spectroscopy (MES) and EXAFS at the W-L-III edge. NiW catalysts were studied with MES by probing the Ni atoms with 57Co. MES results demonstrate that the 'Ni-W-S' phase is present in sulfided NiW catalysts. Formation of Co9S8-type phases could be related to the lower thiophene HDS activity of CoW catalysts. WEXAFS showed that addition of Co or Ni to a W/Al2O3 catalyst results in a higher W sulfidation degree. No structural differences were found for carbon- and alumina-supported catalysts, in spite of the two times larger thiophene HDS activity of carbon- supported NiW.

KW - CoW sulfide

KW - Exafs

KW - NiW sulfide

KW - Hydrodesulfurization catalysts

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U2 - 10.1023/A:1021211103003

DO - 10.1023/A:1021211103003

M3 - Article

SN - 0304-3843

VL - 139

SP - 51

EP - 57

JO - Hyperfine Interactions

JF - Hyperfine Interactions

IS - 1-4

ER -

Characterization of carbon- and alumina-supported NiW and CoW sulfided catalysts

Abstract

Keywords

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