Metal sulfide-support interactions

Journal Article · Sat Feb 01 04:00:00 EST 1986 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(86)90010-2· OSTI ID:5327064

Burch, R; Collins, A

Alumina-supported Ni catalysts have been prepared and their activity for the hydrodesulfurization (HDS) of thiophene measured in a flow microreactor at atmospheric pressure. The HDS activity has been compared with that obtained for a standard silica-supported Ni catalyst. The results show that on a unit mass basis the Ni/SiO/sub 2/ catalyst is almost an order of magnitude more active than the Ni/Al/sub 2/O/sub 3/ catalysts and that this difference is independent of whether or not the Ni/Al/sub 2/O/sub 3/ catalysts are calcined before use. The amount of O/sub 2/ adsorbed at 195 K or of CO adsorbed at ambient temperature onto presulfided catalysts was measured in a static volumetric system, and the data were used to estimate the dispersion of the active sulfide phase. The specific activity of the catalysts was determined using the adsorption data. It was found that the Ni/SiO/sub 2/ catalyst was significantly more active than any of the Ni/Al/sub 2/O/sub 3/ catalysts. Comparison with activity data for unsupported Ni/sub 3/S/sub 2/ and Ni/C catalysts shows that the Ni/SiO/sub 2/ has activity comparable to that of Ni/sub 3/S/sub 2/. It is proposed that the low activity of sulfided Ni/Al/sub 2/O/sub 3/ catalysts arises because of a metal sulfide-support interaction which may alter the morphology or composition of the Ni sulfide phase.

• Research Organization: The University, Whiteknights (England)
• OSTI ID: 5327064
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 97:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
DESULFURIZATION
ELEMENTS
HETEROCYCLIC COMPOUNDS
HYDROGENATION
METALS
MINERALS
NICKEL
NICKEL COMPOUNDS
NICKEL SULFIDES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SULFIDES
SULFUR COMPOUNDS
THIOPHENE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS