The versatile role of nickel in Ni-MoS/sub 2//Al/sub 2/O/sub 3/ hydrotreating catalysts as shown by the use of probe molecules

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5239507

Hubaut, R; Jalowiecki, L; Kasztelan, S; Grimblot, J ^[1]

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1. Lab. de Catalyse Heterogene et Homogene, U.A. C.N.R.S. n 402, Univ. des Sciences et Techniques de Lille Flandres-Artois 59655 Villeneuve D'Ascq Cedex (FR)

The nickel promoted and unpromoted MoS/sub 2/-{gamma}Al/sub 2/O/sub 3/ hydrotreating catalysts are described as small MoS/sub 2/ patches well dispersed on the support. Nickel, as a promoter, is interacting with these small platelets at the edges through Ni-5-Mo bonds as already described for the well-known Co-Mo-S phase. Active sites for reactions relevant to the hydrotreating process -i.e.- hydrogenation, isomerization and C-hetero- atom bond hydrogenolysis can be created by the removal of some labile sulfur at the edges of these small patches. By choosing appropriate experimental conditions and selected probe molecules, a description and classification of the sites in term of number of anionic vacancies can be given. Toluene hydrogenation at 60 atm in presence of H/sub 2/S is catalyzed by both systems but, when Ni is present, a high promoting effect is usually observed.

• OSTI ID: 5239507
• Report Number(s): CONF-881143--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
ELEMENTS
HYDROGENATION
METALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NICKEL
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PHASE STUDIES
REFRACTORY METAL COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS