Effect of treatment with triethylaluminium on the hydrogenation and hydrodesulfurization activity of molybdenum, cobalt, and nickel sulfide catalysts

Journal Article · Wed Sep 01 04:00:00 EDT 1982 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(82)90153-1· OSTI ID:6626734

Bhaduri, M; Mitchell, P C.H.

The activities for hydrogenation of hex-l-ene (1 atm, 573/sup 0/K) and hydrodesulfurization (hds) of thiophene (1 atm, 673/sup 0/K) of alumina-supported molybdenum, cobalt, and nickel sulfide catalysts, and a sulfided Co-Mo/..gamma..-Al/sub 2/O/sub 3/ catalyst have been measured before and after treatment of the catalyst with triethylaluminium (AlEt/sub 3/). The triethylaluminium treatment (1) increased the hex-l-ene hydrogenation activity of the individual sulfides; (2) decreased the hex-l-ene hydrogenation activity of the sulfided Co-Mo/..gamma..-Al/sub 2/O/sub 3/; (3) increased the thiophene hds activity of sulfided Mol/..gamma..-Al/sub 2/O/sub 3/; and (4) decreased the thiophene hds activity of the other catalysts and loss of promoting effect of Co on sulfided Mo in the sulfided Co-Mo/..gamma..-Al/sub 2/O/sub 3/ catalyst. The hydrogenation activities of the catalysts decreased after they had been used for hds. The AlEt/sub 3/ treatment of the catalysts also caused changes in their electron spin resonance spectra which are attributed to reduction of oxidic Mo(V) to oxidic Mo(III) and sulfided Co(II) to sulfided Co(I). The work provides additional evidence that the active species is a Mo(IV) sulfide promoted by Co(II).

• Research Organization: The Univ., Whiteknights, Reading, England
• OSTI ID: 6626734
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 77:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400 -- Petroleum-- Processing
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT
DATA
DESULFURIZATION
ELEMENTS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGENATION
INFORMATION
METALS
MOLYBDENUM
NICKEL COMPOUNDS
NICKEL SULFIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REDUCTION
SULFIDATION
SULFIDES
SULFUR COMPOUNDS
THIOPHENE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS