English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Nature of cobalt species during the in situ sulfurization of Co(Ni)Mo/Al2O3 hydrodesulfurization catalysts

Al Samarai, M., van Oversteeg, C. H. M., Delgado-Jaime, M. U., Weng, T.-C., Sokaras, D., Liu, B., et al. (2019). Nature of cobalt species during the in situ sulfurization of Co(Ni)Mo/Al2O3 hydrodesulfurization catalysts. Journal of Synchrotron Radiation; Published for the International Union of Crystallography by Munksgaard, Copenhagen, Denmark, 26(3), 811-818. doi:10.1107/S1600577519002546.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-A91D-D Version Permalink: http://hdl.handle.net/21.11116/0000-0005-A91E-C
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Al Samarai, Mustafa1, Author              
van Oversteeg, Christa H. M., Author
Delgado-Jaime, Mario Ulises, Author
Weng, Tsu-Chien, Author
Sokaras, Dimosthenis, Author
Liu, Boyang, Author
van der Linden, Marte, Author
van der Eerden, Ad M. J., Author
Vogt, Eelco T. C., Author
Weckhuysen, Bert M., Author
de Groot, Frank M. F., Author
Affiliations:
1Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023871              

Content

show
hide
Free keywords: -
 Abstract: The evolution in local structure and electronic properties of cobalt was investigated during in situ sulfurization. Using a combination of 1s X-ray absorption (XAS) and 1s3p resonant inelastic X-ray scattering (RIXS), the valence, coordination and symmetry of cobalt ions were tracked in two cobalt-promoted molybdenum oxide precursors of the hydrodesulfurization catalyst system, namely Co-Mo/Al2O3 and Co-Ni-Mo/Al2O3. Extended X-ray absorption fine structure shows that the CoO bonds were replaced with CoS bonds as a function of reaction temperature. The cobalt K pre-edge intensity shows that the symmetry of cobalt was modified from Co3+Oh and Co2+Oh to a Co2+ ion where the inversion symmetry is broken, in agreement with a square-pyramidal site. The 1s3p RIXS data revealed the presence of an intermediate cobalt oxy-sulfide species. This species was not detected from XAS and was determined from the increased information obtained from the 1s3p RIXS data. The cobalt XAS and RIXS data show that nickel has a significant influence on the formation of the cobalt oxy-sulfide intermediate species prior to achieving the fully sulfided state at T > 400 degrees C.

Details

show
hide
Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000467526100024
DOI: 10.1107/S1600577519002546
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Synchrotron Radiation; Published for the International Union of Crystallography by Munksgaard, Copenhagen, Denmark
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 26 (3) Sequence Number: - Start / End Page: 811 - 818 Identifier: ISSN: 0909-0495