Catalyst development for direct heat supply from combustion to reforming in methane reforming with CO2 and O2 Original Research Article

Pt(0.3)/Ni(10)/Al2O3 prepared by a sequential impregnation method exhibited better performance in methane reforming with CO2 and O2 in terms of the catalytic activity and the temperature profile of the catalyst bed than Pt(0.3)+Ni(10)/Al2O3 prepared by the coimpregnation method, Ni(10)/Al2O3, Pt(0.3)/Al2O3. In methane reforming with CO2 and O2 on monometallic Ni(10)/Al2O3 catalyst, methane combustion proceeded near the catalyst bed inlet and then the methane reforming proceeded, so a large temperature gradient was observed. However, a flat temperature profile was observed on Pt(0.3)/Ni(10)/Al2O3. This suggests that the methane combustion and reforming can proceed simultaneously, and that the heat of combustion is effectively supplied to the reforming reaction. The surface Pt atoms on Ni catalyst can contribute to the enhancement of the catalyst reducibility. This can be an energy efficient process for syngas production, utilizing the combination of catalytic combustion with reforming.