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Study of the partial oxidation of propene by O2 and N2O over fixed Mo catalysts. Essential factors for catalysis and reaction mechanisms
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1980
Year
Materials ScienceInorganic ChemistryChemical EngineeringFixed CatalystsEngineeringOxygen Reduction ReactionFixed Mo CatalystsActive SitesHeterogeneous CatalysisEssential FactorsSingle-atom CatalystCatalysisMolecular CatalysisChemistryCatalyst ActivationCatalytic ProcessChemical KineticsPartial Oxidation
The partial oxidation of propene by O2 and N2O over fixed Mo catalysts with a well-defined structure of active sites was studied. The fixed catalysts had much higher activity than the impregnation catalysts. The co-ordinatively unsaturated dioxo-structure of Mo6+ ions [graphic omitted] uniformly and molecularly distributed in a tetrahedral position is an essential factor for the dehydrogenation activity. The OH and oxo-groups of [graphic omitted] made from [graphic omitted] during the reaction did not add to the allyl species to form acrolein. The tetrahedral dioxo-Mo6+ structure is also an active species for the oxidative double-bond scission of propene. These two reactions are competitive in the presence of O2. The oxidation products depended upon the nature of the oxygen species. The reaction mechanisms are discussed.