The Canadian Journal of Chemical Engineering · 1963 · 23 citations · 4 references
Natural SciencesChemical EngineeringChemistryCatalysisChemical KineticsOrganic ChemistryCatalyst DeactivationCatalytic MechanismsCatalytic Reaction KineticsChemical Reaction KineticsKinetic ModelingOxidation-reduction ReactionsCatalyst Deactivation KineticsDeactivation KineticsDeactivation MechanismsOxidationOxidation KineticsReaction Engineering Of Catalytic ReactorsReaction Kinetics ModelingRedox Reaction Kinetics
Abstract The kinetics of the vapor‐phase oxidation of benzene over a sulphate‐promoted vanadium oxide catalyst were studied in a differential flow‐reactor. Rates of oxidation of benzene were measured at temperatures in the range 324° to 400°C., for benzene concentrations from 1 × 10 −3 to 6 × 10 −3 moles/l., by analysing the products: p‐benzoquinone and maleic anhydride. Reaction‐rate data were summarized by the following equation based upon a mechanism suggested by Hinshelwood: Catalyst deactivation was observed during the oxidation of benzene. Benzene, naphthalene, and toluene oxidations over a common vanadium oxide catalyst were compared. Deactivation was observed with benzene and toluene, but not with naphthalene. The rate equation provides a useful empirical description of oxidation rates of individual compounds. However, the deactivation behavior of the systems and the rates observed indicate that the mechanism used in its derivation is not pertinent.
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