Study On Catalysts For Propane Oxidative Dehydrogenation With CO₂ To Propene

A series of the V-Cr/SBA-15 catalysts with different V and Cr contents were prepared by the incipient wetness impregnation method. The structure of the catalysts was characterized by XRD, BET and TPR technique. The catalytic activity of the catalysts for the propane oxidative dehydrogenation with CO₂ to propene was evaluated with a fixed bed reactor. The results show that the vanadium and chromium oxide were well dispersed on the surface of SBA-15 and the structure of the SBA-15 was not destroyed in the impregnation. The catalytic activity of the catalysts was depended on the loading of vanadium and chromium. All of the catalysts have good performance. The V and Cr bimetallic catalysts had better performance than that of the single metallic catalysts with the same content. The TPR results shown that there was the strong interaction between the vanadium oxide and the chromium oxide in the V-Cr/SBA-15 catalysts. This interaction remarkably changed the redox properties of the catalysts.Metallic support structured catalyst for propane dehydrogenation was prepared. First, a washcoat layer was built by high-temperature pre-oxidation with the FeCrAl alloy slices. Second, the Al₂O₃ colloid was impregnated repeatly on FeCrAl foils three times,. Then, the V-Cr/SBA-15/Al₂O₃/FeCrAl activated colloid were impregnated repeatly on FeCrAl foils, catalyst was prepared. The...