Thermodynamics of benzene adsorption of vanadium pentoxide-based oxidation catalysts
Journal Article
·
· J. Colloid Interface Sci.; (United States)
- Univ. Salford
Thermodynamics of benzene adsorption on vanadium pentoxide-based oxidation catalysts were studied in connection with the mechanism of benzene oxidation to maleic anhydride by measuring heats of immersion and adsorption isotherms of benzene on two alumina-supported catalysts of similar structure one (A) containing 10% vanadium pentoxide and 5% molybdenum trioxide and the other (B) containing 15% vanadium pentoxide. The results, including BET surface areas and entropies of adsorption as a function of surface area, showed that benzene interacted more strongly with catalyst A but that the mode of adsorption was the same for both catalysts, i.e., that the molybdena promoter enhanced the affinity of the catalyst surface for the reactant species. The difference between the two catalysts was greatest at low coverages, when benzene was adsorbed on the sites of highest energy as a species of low mobility. The structural similarity of the two catalysts was confirmed from nitrogen adsorption data.
- OSTI ID:
- 5382034
- Journal Information:
- J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 64:2; ISSN JCISA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BENZENE
CATALYSIS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ACTIVATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
ENTROPY
HYDROCARBONS
KINETICS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION KINETICS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BENZENE
CATALYSIS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ACTIVATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
ENTROPY
HYDROCARBONS
KINETICS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION KINETICS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES