Carbon dioxide reforming of methane for hydrogen production on co catalysts and ni-co bimetallic catalysts

Abstract

The cobalt catalysts (cobalt content by weight: 7%, 10% and 15%) and cobalt-nickel bimetallic catalysts (cobalt-nickel content by weight: 3.5%-3.5%, 5%-5%, 7%-7%, 10%-10% and 15%-15%) were studied in dry reforming of methane for hydrogen and synthesis gas production. All catalysts were synthesized by the wetness impregnation method. The dry reforming of methane was carried out at 700oC, atmosphere pressure using a mixture; CH4 and CO2 in ratio 1:1. It was found that, after 120 minutes, the catalysts that gave the best methane conversion are 10%Co/Al2O3 (61.86%) for mono-metallic catalysts and 10%Ni-10%Co/Al2O3 (96.86%) for bimetallic catalysts. Moreover, the effect of adding potassium promoter to 10%Ni-10%Co/Al2O3 catalyst was studied. The methane conversion of potassium promoted 10%Ni-10%Co/Al2O3 catalyst was slightly lower than one without potassium. However, the adding of promoter could significantly decrease the carbon content on the catalysts.