Physicochemical Properties and Catalytic Performances of Nanostructured V2O5 over TiO2 and γ-Al2O3 for Oxidative Dehydrogenation of Propane

Samples of V 2 O 5 catalysts supported on nanostructures of TiO 2 and γ-Al 2 O 3 were synthesized through the hydrothermal method and used for the oxidative dehydrogenation of propane (ODHP) to propylene.The TiO 2 support was utilized in both commercial microstructure and synthesized nanostructure forms.Moreover, the γ-Al 2 O 3 support was synthesized through chemical and precipitation methods.The vanadium catalyst was then deposited onto the hybrid of the TiO 2 and γ-Al 2 O 3 materials.All prepared catalysts were characterized through the BET, FESEM, FTIR, XRD and TPR techniques.Performances of the synthesized catalysts were subsequently examined in a fixed-bed reactor.The main products were propylene, ethylene and CO x .The prepared catalysts over TiO 2 and γ-Al 2 O 3 were evaluated under reactor test conditions of 500 °C, feed of C 3 H 8 /air with molar ratio of 0.6, and total feed flow rate of 90 mL min -1 .These resulted in optimum values of 35.53 and 23.88 % for the propylene selectivity and propane conversion, respectively 6 h after the start of the reaction.The comparison of performances made between the synthesized materials and those available in the open literature for the ODHP reaction was indeed satisfactory.