Aging time investigation in dry reforming of methane over 5%wt Ni/SiO2 catalyst

The CO2 reforming of methane over 5wt% Ni/SiO2 catalyst for perusing the effect of aging time in this process was discussed by two methods using Citric acid with different concentrations and mixture of NH3 and water by sol–gel process. All the catalysts prepared with the above methods were calcined at 500 ˚C. After reduction, catalytic activity toward CO2 reforming of CH4 with CO2/CH4 ratio equal to 1 was tested at 700, 750 and 800˚C. It was found that CO2 and CH4 conversions were similar for both mentioned methods in this work, indeed, aging time and surface area do not have key roles in DRM. The results demonstrated that the conversions of CO2 and CH4 and the H2/CO ratio for both approaches were 0.9772, 0.9700 and 0.9500 respectively.

کلیدواژه ها:

DRM ، Syngas ، SiO2 ، Citric acid ، Nickel catalyst