Abstract
A 36 channel reactor system combining high-throughput experimentation (HTE) with operando UV/vis diffuse reflectance (UV/vis-DR) spectroscopy is introduced and applied for the oxidative dehydrogenation of propane (ODP) to propene at 500 °C over polycrystalline V 2O 3, VO 2, and V 2O 5. This set-up enabled to monitor reaction-induced reduction of V 2O 5 to V 2O 3, and VO 2 during the ODP reaction. The operando UV/vis-DR spectroscopic analysis along the catalyst bed demonstrated that the vanadium oxidation state at the reactor inlet is higher than at the reactor outlet. This is due to the depletion of oxygen and the enrichment of propene down stream along the catalyst bed.
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