Role of CO2 During Oxidative Dehydrogenation of Propane Over Bulk and Activated-Carbon Supported Cerium and Vanadium Based Catalysts

Abstract CeO 2 , V O 5 and CeVO 4 were synthesised as bulk oxides, or deposited over activated carbon, characterized by XRD, HRTEM, CO -TPO, C 3 H 8 -TPR, DRIFTS Raman techniques tested in propane oxidative dehydrogenation using . Complete oxidation of to is favoured lattice oxygen The temperature programmed experiments show the ~ nm AC supported crystallites become more susceptible reduction propane, but less prone re-oxidation with compared Catalytic activity /AC catalysts requires a 1–2 amorphous layer. During reaction, layer crystallises several atomic layers carbon cover surface, resulting deactivation. irreversibly reduced favours catalytic propene selectivity. Bulk promotes only cracking no In VO x materials, vanadium carbide catalytically active phase. Propane VC proceeds via chemisorbed species originating from dissociated Graphic