Selective photooxidation of light alkanes to oxygenates using supported molybdenum oxide catalysts

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Abstract
Photo-assisted catalytic partial oxidation of methane, ethane and propane has been performed in the presence of supported molybdenum oxide catalysts at around 500 K by the use of a fluidized bed flow-type reactor under UV irradiation. Temperatures as high as 500 K were indispensable for the selective formation of methanal from methane (ca. 19 µmol h–1), corresponding to 5.5% of the photons irradiated into the catalyst bed ( ca. 80 µmol h–1) at elevated temperature. The reaction seemed to proceed via charge-transfer complexes formed by photo-activation of terminal coordinatively unsaturated MO groups in multilayers of molybdenum species.

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