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Title: The structure of the cobalt sulfide phase in carbon-supported Co and Co-Mo sulfide catalysts as studied by EXAFS (Extended X-Ray Absorption Fine Structure) and XANES (X-Ray Absorption Near Edge)

Abstract

The EXAFS (Extended X-Ray Absorption Fine Structure) technique is nowadays a valuable tool in the characterization of catalysts. The strength of EXAFS is that it can provide structural information on highly dispersed systems that are difficult to study with other conventional techniques. With respect to hydrotreating catalysts (e.g., sulfided Co-Mo/Al{sub 2}O{sub 3} or Ni-Mo/Al{sub 2}O{sub 3}) EXAFS has been able to provide direct information regarding the local structure of the phases present in a working catalyst. Although the study of hydrotreating catalysts in general has received much attention during the last decade, several important questions regarding the structural characteristics are still unanswered. One of these concerns the role of the promoter Co and Ni ions in sulfided Co(Ni)-Mo catalysts. In order to elucidate the structure of the cobalt sulfide phase in a sulfided Co/C and a Co-Mo/C catalyst they applied in this study the EXAFS and XANES (X-Ray Absorption Near Edge Structure) techniques at the Co K-edge.

Authors:
; ; ;  [1]
  1. Univ. of Technology, Eindhoven (Netherlands)
Publication Date:
OSTI Identifier:
5069438
Report Number(s):
CONF-880939-
Journal ID: ISSN 0569-3799; CODEN: ACPCA
Resource Type:
Conference
Journal Name:
American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)
Additional Journal Information:
Journal Volume: 33:4; Conference: Symposium on preparation and characterization of catalysts, Los Angeles, CA (USA), 25-30 Sep 1988; Journal ID: ISSN 0569-3799
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COBALT; CATALYTIC EFFECTS; STRUCTURAL CHEMICAL ANALYSIS; MOLYBDENUM; SULFIDES; ABSORPTION SPECTROSCOPY; CATALYSIS; CATALYSTS; EXPERIMENTAL DATA; FINE STRUCTURE; X RADIATION; CHALCOGENIDES; DATA; ELECTROMAGNETIC RADIATION; ELEMENTS; INFORMATION; IONIZING RADIATIONS; METALS; NUMERICAL DATA; RADIATIONS; SPECTROSCOPY; SULFUR COMPOUNDS; TRANSITION ELEMENTS; 020400* - Petroleum- Processing; 400201 - Chemical & Physicochemical Properties

Citation Formats

Bouwens, S M.A.M., Koningsberger, D C, de Beer, V H.J., and Prins, R. The structure of the cobalt sulfide phase in carbon-supported Co and Co-Mo sulfide catalysts as studied by EXAFS (Extended X-Ray Absorption Fine Structure) and XANES (X-Ray Absorption Near Edge). United States: N. p., 1988. Web.
Bouwens, S M.A.M., Koningsberger, D C, de Beer, V H.J., & Prins, R. The structure of the cobalt sulfide phase in carbon-supported Co and Co-Mo sulfide catalysts as studied by EXAFS (Extended X-Ray Absorption Fine Structure) and XANES (X-Ray Absorption Near Edge). United States.
Bouwens, S M.A.M., Koningsberger, D C, de Beer, V H.J., and Prins, R. Thu . "The structure of the cobalt sulfide phase in carbon-supported Co and Co-Mo sulfide catalysts as studied by EXAFS (Extended X-Ray Absorption Fine Structure) and XANES (X-Ray Absorption Near Edge)". United States.
@article{osti_5069438,
title = {The structure of the cobalt sulfide phase in carbon-supported Co and Co-Mo sulfide catalysts as studied by EXAFS (Extended X-Ray Absorption Fine Structure) and XANES (X-Ray Absorption Near Edge)},
author = {Bouwens, S M.A.M. and Koningsberger, D C and de Beer, V H.J. and Prins, R},
abstractNote = {The EXAFS (Extended X-Ray Absorption Fine Structure) technique is nowadays a valuable tool in the characterization of catalysts. The strength of EXAFS is that it can provide structural information on highly dispersed systems that are difficult to study with other conventional techniques. With respect to hydrotreating catalysts (e.g., sulfided Co-Mo/Al{sub 2}O{sub 3} or Ni-Mo/Al{sub 2}O{sub 3}) EXAFS has been able to provide direct information regarding the local structure of the phases present in a working catalyst. Although the study of hydrotreating catalysts in general has received much attention during the last decade, several important questions regarding the structural characteristics are still unanswered. One of these concerns the role of the promoter Co and Ni ions in sulfided Co(Ni)-Mo catalysts. In order to elucidate the structure of the cobalt sulfide phase in a sulfided Co/C and a Co-Mo/C catalyst they applied in this study the EXAFS and XANES (X-Ray Absorption Near Edge Structure) techniques at the Co K-edge.},
doi = {},
url = {https://www.osti.gov/biblio/5069438}, journal = {American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)},
issn = {0569-3799},
number = ,
volume = 33:4,
place = {United States},
year = {1988},
month = {9}
}

Conference:
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