Effect of supports on catalytic activity of chromium oxide-based catalysts in the dehydrogenation of propane with CO₂

Dehydrogenation of propane in the presence and absence of CO₂ over CrO _x /SiO₂ and CrO _x /Al₂O₃ catalysts with Cr loading between 0.7–20.4 wt% was discussed. It was found that the nature of support strongly effects on the catalytic performance in the dehydrogenation with CO₂. Over the CrO _x /SiO₂ catalyst CO₂ enhance the propene yield, whereas over the CrO _x /Al₂O₃ catalyst the yield and selectivity of propene in the presence of CO₂ strongly decrease. The effect of steam on catalytic performance of the tested catalysts was also discussed.