Bulletin des Sociétés Chimiques Belges · 1995 · 20 citations · 20 references
Natural SciencesChemical EngineeringChemistryCatalysisInorganic ChemistryReaction EngineeringCatalyst DesignCatalytic MaterialsCatalytic MechanismsCatalytic Reaction EngineeringIndustrial CatalysisIndustrial Catalytic ProcessesCatalyst MechanismsCatalytic EfficiencyHydrodesulfurizationHydrogenationHydrogenation CatalysisHydrogenation ReactionsHydrotreatingSupported Hydrodesulfurization Catalysts
Abstract Two industrial hydrotreating catalysts, CoMo/Al 2 O 3 and NiMo/Al 2 O 3 , were compared with respect to their activity and selectivity In thiophene hydrodesulphurisation and cyclohexene hydrogenation at 280°C and 4 MPa. Their difference in catalytic properties for HDS and hydrogenation was found strongly dependent on the experimental conditions. Addition of small amounts of H 2 S to the feed inhibits the activity of both catalysts; but at high H 2 S levels, the catalysts remain active. A new type of site is proposed to operate at high H 2 S levels. The NiMo catalyst was found far more active than the CoMo catalyst at low H 2 S pressure, while the two catalysts became equivalent at high H 2 S levels.
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