Highly efficient Pt/Mo-Fe/Ni-based Al2O3-CeO2 catalysts for dry reforming of methane

Abstract

Abstract Herein, the activity and stability of Ni-based Al2O3-CeO2 supported monometallic Mo, bimetallic Fe-Mo and Pt-Mo, and trimetallic Pt-Fe-Mo complex catalysts were evaluated in the carbon dioxide dry reforming of methane. The catalysts were prepared by incipient wetness impregnation method using various amounts of Ni, Fe, Mo and Pt, and were characterized by BET, XRD, XRF, H2-TPR, CO2-TPD, and FTIR-Pyridine techniques. The catalytic performance of the as-synthesized Ni-based Al2O3-CeO2 complex catalysts were investigated in a fixed-bed continuous-flow reactor at various reaction temepratures (550–700 °C), space velocity of 12,000 ml g c a t - 1 h−1 and different feedstocks (pure CH4 or 50% CH4/CO2 mixture) under atmospheric pressure for 10 h time-on-stream. The co-doped Ni/Al2O3-CeO2 catalyst with Mo and Fe was found to significantly enhance the catalyst performance (more than 80% methane and 86% CO2 conversions). Further, our results indicated that the addition of 0.005 wt% Pt to the FeMo/Ni/Al2O3-CeO2 complex catalyst leads to an excellent catalytic performance at 700 °C during the dry reforming reaction. Pt/FeMo/Ni/Al2O3-CeO3 demonstrated good activity/selectivity with very low carbon deposition.