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Title: Characterization and Hydrodesulfurization Properties of Catalysts Derived from Amorphous Metal-Boron Materials

Abstract

Unsupported and silica-supported amorphous metal-boron materials (Ni-B, Mo-O-B, and Ni-Mo-O-B) were prepared by NaBH{sub 4} reduction of aqueous or impregnated metal salts. The resulting materials were characterized by a range of techniques, including conventional and time-resolved X-ray diffraction. The latter technique was used to determine the onset of crystallization of the amorphous materials during annealing in He flow and to identify the phases formed. Annealing of unsupported Ni-B resulted in the crystallization of predominantly Ni{sub 3}B, followed by Ni metal, whereas Ni-B/SiO{sub 2} formed Ni and then NiO. There was no evidence for crystallization of B-containing phases for Mo-O-B or Mo-O-B/SiO{sub 2} on annealing; instead, the predominant phase formed was MoO{sub 2}. In general, the phases formed for Ni-Mo-O-B and Ni-Mo-O-B/SiO2 were consistent with those formed in the monometallic materials, but at higher annealing temperatures. Catalysts prepared by sulfiding Ni-B/SiO{sub 2} and Ni-Mo-O-B/SiO{sub 2} materials had significantly higher thiophene HDS activities than conventionally prepared sulfided Ni/SiO2 and Ni-Mo/SiO{sub 2} catalysts, whereas a sulfided Mo-O-B/SiO{sub 2} catalyst had a dramatically lower HDS activity than a sulfided Mo/SiO{sub 2} catalyst.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930289
Report Number(s):
BNL-80993-2008-JA
Journal ID: ISSN 0021-9517; JCTLA5; TRN: US200822%%1244
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Catalysis; Journal Volume: 246; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CATALYSTS; SILICA; BORON; NICKEL; MOLYBDENUM; SYNTHESIS; PHASE STUDIES; THIOPHENE; DESULFURIZATION; CATALYTIC EFFECTS; national synchrotron light source

Citation Formats

Parks,G., Pease, M., Burns, A., Layman, K., Bussell, M., Wang, X., Hanson, J., and Rodriquez, J. Characterization and Hydrodesulfurization Properties of Catalysts Derived from Amorphous Metal-Boron Materials. United States: N. p., 2007. Web. doi:10.1016/j.jcat.2006.12.009.
Parks,G., Pease, M., Burns, A., Layman, K., Bussell, M., Wang, X., Hanson, J., & Rodriquez, J. Characterization and Hydrodesulfurization Properties of Catalysts Derived from Amorphous Metal-Boron Materials. United States. doi:10.1016/j.jcat.2006.12.009.
Parks,G., Pease, M., Burns, A., Layman, K., Bussell, M., Wang, X., Hanson, J., and Rodriquez, J. Mon . "Characterization and Hydrodesulfurization Properties of Catalysts Derived from Amorphous Metal-Boron Materials". United States. doi:10.1016/j.jcat.2006.12.009.
@article{osti_930289,
title = {Characterization and Hydrodesulfurization Properties of Catalysts Derived from Amorphous Metal-Boron Materials},
author = {Parks,G. and Pease, M. and Burns, A. and Layman, K. and Bussell, M. and Wang, X. and Hanson, J. and Rodriquez, J.},
abstractNote = {Unsupported and silica-supported amorphous metal-boron materials (Ni-B, Mo-O-B, and Ni-Mo-O-B) were prepared by NaBH{sub 4} reduction of aqueous or impregnated metal salts. The resulting materials were characterized by a range of techniques, including conventional and time-resolved X-ray diffraction. The latter technique was used to determine the onset of crystallization of the amorphous materials during annealing in He flow and to identify the phases formed. Annealing of unsupported Ni-B resulted in the crystallization of predominantly Ni{sub 3}B, followed by Ni metal, whereas Ni-B/SiO{sub 2} formed Ni and then NiO. There was no evidence for crystallization of B-containing phases for Mo-O-B or Mo-O-B/SiO{sub 2} on annealing; instead, the predominant phase formed was MoO{sub 2}. In general, the phases formed for Ni-Mo-O-B and Ni-Mo-O-B/SiO2 were consistent with those formed in the monometallic materials, but at higher annealing temperatures. Catalysts prepared by sulfiding Ni-B/SiO{sub 2} and Ni-Mo-O-B/SiO{sub 2} materials had significantly higher thiophene HDS activities than conventionally prepared sulfided Ni/SiO2 and Ni-Mo/SiO{sub 2} catalysts, whereas a sulfided Mo-O-B/SiO{sub 2} catalyst had a dramatically lower HDS activity than a sulfided Mo/SiO{sub 2} catalyst.},
doi = {10.1016/j.jcat.2006.12.009},
journal = {Journal of Catalysis},
number = 2,
volume = 246,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}