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Title: Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith

Abstract

New amorphous molybdenum/tungsten sulfides with the general formula M{sup n+}{sub 2x/n}(L{sub 6}S{sub 8})S{sub x}, where L is molybdenum or tungsten and M is a ternary metal, has been developed. Characterization of these amorphous materials by chemical and spectroscopic methods (IR, Raman, PES) shows that the (M{sub 6}S{sub 8}){sup 0} cluster units are present. Vacuum thermolysis of the amorphous Na{sub 2x}(Mo{sub 6}S{sub 8})S{sub x}{hor_ellipsis}yMeOH first produces poorly crystalline NaMo{sub 6}S{sub 8} by disproportionation at 800 C and well-crystallized NaMo{sub 6}S{sub 8} at {>=} 900 C. Ion-exchange of the sodium material in methanol with soluble M{sup 2+} and M{sup 3+} salts (M=Sn, Co, Ni, Pb, La, Ho) produces the M{sup n+}{sub 2x/n}(Mo{sub 6}S{sub 8})S{sub x}{hor_ellipsis}yMeOH compounds. Additionally, the new reduced ternary molybdenum sulfides with the general formula M{sup n+}{sub 2x/n}Mo{sub 6}S{sub 8+x}(MeOH){sub y}[MMOS] (M=Sn, Co, Ni) is an effective hydrodesulfurization (HDS) catalyst both as-prepared and after a variety of pretreatment conditions. Under specified pretreatment conditions with flowing hydrogen gas, the SnMoS type catalyst can be stabilized, and while still amorphous, can be considered as ``Chevrel phase-like`` in that both contain Mo{sub 6}S{sub 8} cluster units. Furthermore, the small cation NiMoS and CoMoS type pretreated catalyst is shown to be very active HDSmore » catalysts with rates that exceeded the model unpromoted and cobalt-promoted MoS{sub 2} catalysts. 9 figs.« less

Inventors:
; ; ;
Issue Date:
Research Org.:
Iowa State University
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
321236
Patent Number(s):
5,872,073
Application Number:
PAN: 8-694,907
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 400201; 010408; 020400; PA: EDB-99:031044; SN: 99002064380
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 16 Feb 1999
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 01 COAL, LIGNITE, AND PEAT; 02 PETROLEUM; MOLYBDENUM SULFIDES; TUNGSTEN SULFIDES; PRECURSOR; PYROLYSIS; ION EXCHANGE; TIN; COBALT; NICKEL; LEAD; LANTHANUM; HOLMIUM; CATALYSTS; HYDROGENATION; DESULFURIZATION

Citation Formats

Hilsenbeck, S.J., McCarley, R.E., Schrader, G.L., and Xie, X.B. Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith. United States: N. p., 1999. Web.
Hilsenbeck, S.J., McCarley, R.E., Schrader, G.L., & Xie, X.B. Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith. United States.
Hilsenbeck, S.J., McCarley, R.E., Schrader, G.L., and Xie, X.B. Tue . "Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith". United States.
@article{osti_321236,
title = {Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith},
author = {Hilsenbeck, S.J. and McCarley, R.E. and Schrader, G.L. and Xie, X.B.},
abstractNote = {New amorphous molybdenum/tungsten sulfides with the general formula M{sup n+}{sub 2x/n}(L{sub 6}S{sub 8})S{sub x}, where L is molybdenum or tungsten and M is a ternary metal, has been developed. Characterization of these amorphous materials by chemical and spectroscopic methods (IR, Raman, PES) shows that the (M{sub 6}S{sub 8}){sup 0} cluster units are present. Vacuum thermolysis of the amorphous Na{sub 2x}(Mo{sub 6}S{sub 8})S{sub x}{hor_ellipsis}yMeOH first produces poorly crystalline NaMo{sub 6}S{sub 8} by disproportionation at 800 C and well-crystallized NaMo{sub 6}S{sub 8} at {>=} 900 C. Ion-exchange of the sodium material in methanol with soluble M{sup 2+} and M{sup 3+} salts (M=Sn, Co, Ni, Pb, La, Ho) produces the M{sup n+}{sub 2x/n}(Mo{sub 6}S{sub 8})S{sub x}{hor_ellipsis}yMeOH compounds. Additionally, the new reduced ternary molybdenum sulfides with the general formula M{sup n+}{sub 2x/n}Mo{sub 6}S{sub 8+x}(MeOH){sub y}[MMOS] (M=Sn, Co, Ni) is an effective hydrodesulfurization (HDS) catalyst both as-prepared and after a variety of pretreatment conditions. Under specified pretreatment conditions with flowing hydrogen gas, the SnMoS type catalyst can be stabilized, and while still amorphous, can be considered as ``Chevrel phase-like`` in that both contain Mo{sub 6}S{sub 8} cluster units. Furthermore, the small cation NiMoS and CoMoS type pretreated catalyst is shown to be very active HDS catalysts with rates that exceeded the model unpromoted and cobalt-promoted MoS{sub 2} catalysts. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {2}
}