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Title: In situ XAS of Ni-W hydrocracking catalysts.

Abstract

Ni-W based catalysts are very attractive in hydrotreating of heavy oil due to their high hydrogenation activity. In the present research, two catalyst samples, prepared by different methods, that exhibit significant differences in activity were sulfided in situ, and the local structure of the Ni and W were studied using X-ray absorption spectroscopy (XAS). The Ni XANES spectra were analyzed using a linear component fitting, and the EXAFS spectra of the WS{sub 2} platelets in the sulfided catalysts were modeled. The Ni and W are fully sulfided in the higher activity sample, and there are both unsulfided Ni ({approx}25%) and W (<10%) in the lower activity sample.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
970772
Report Number(s):
ANL/XSD/CP-118911
TRN: US201003%%111
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 13th International Conference on X-ray Absorption Fine Structure (XAFS 13); Jul. 9, 2006 - Jul. 14, 2006; Stanford, CA
Country of Publication:
United States
Language:
ENGLISH
Subject:
02 PETROLEUM; ABSORPTION; ABSORPTION SPECTROSCOPY; CATALYSTS; FINE STRUCTURE; HYDROCRACKING; HYDROGENATION; PETROLEUM; SPECTRA; VISCOSITY

Citation Formats

Yang, N., Mickelson, G. E., Greenlay, N., Kelly, S. D., Bare, S. R., UOP LLC, and EXAFS Analysis. In situ XAS of Ni-W hydrocracking catalysts.. United States: N. p., 2007. Web. doi:10.1063/1.2644625.
Yang, N., Mickelson, G. E., Greenlay, N., Kelly, S. D., Bare, S. R., UOP LLC, & EXAFS Analysis. In situ XAS of Ni-W hydrocracking catalysts.. United States. doi:10.1063/1.2644625.
Yang, N., Mickelson, G. E., Greenlay, N., Kelly, S. D., Bare, S. R., UOP LLC, and EXAFS Analysis. Mon . "In situ XAS of Ni-W hydrocracking catalysts.". United States. doi:10.1063/1.2644625.
@article{osti_970772,
title = {In situ XAS of Ni-W hydrocracking catalysts.},
author = {Yang, N. and Mickelson, G. E. and Greenlay, N. and Kelly, S. D. and Bare, S. R. and UOP LLC and EXAFS Analysis},
abstractNote = {Ni-W based catalysts are very attractive in hydrotreating of heavy oil due to their high hydrogenation activity. In the present research, two catalyst samples, prepared by different methods, that exhibit significant differences in activity were sulfided in situ, and the local structure of the Ni and W were studied using X-ray absorption spectroscopy (XAS). The Ni XANES spectra were analyzed using a linear component fitting, and the EXAFS spectra of the WS{sub 2} platelets in the sulfided catalysts were modeled. The Ni and W are fully sulfided in the higher activity sample, and there are both unsulfided Ni ({approx}25%) and W (<10%) in the lower activity sample.},
doi = {10.1063/1.2644625},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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