(544da) Effect of Fe, Mg, Mo, and Pt Promoters on Ni-Based Catalysts over Al2O3-CeO2 for Oxidative Dehydrogenation of Methane with Carbon Oxide

The promotional effect of Ni in the presence and absence of Pt, Mo, Fe and Mg were studied over Al₂O₃-CeO₂ catalysts for the oxidative dehydrogenation of methane with carbon oxide. The reaction was conducted in a continuous fixed-bed flow reactor at 500-700 °C, space velocity of 1143 mLg-1h-1 (pure CH4 or 50% CH₄ and CO₂ mixture) at atmospheric pressure for 10 h time-on-stream. The catalysts were characterized XRD, XRF, H₂-TPR, pyridine FTIR, and N₂ physisorption techniques. Second promoters were decisive parameters for achieving maximum methane conversion, ethene yield and CO/H₂ ratio. Catalysts with metallic promoters were more resistant toward coking