Methane Co-2 reforming on Ni catalysts: Preparation techniques effects.

The effect of nickel/alumina catalyst preparation methods on its microstruc ture and catalytic activity for the reforming reaction of methane with carb on dioxide were systematically studied. Two series of three catalyst each o ne were prepared. For each series :a) two catalysts were prepared by adding the metal solution precursor in two different steps during the support pre paration and b) the third one by impregnation of that metal solution precur sor on the alumina support previously prepared. The catalyst and/or catalys ts precursors were characterized by x-ray diffraction (DRX),differential th ermoanalysis (DTA/TG), nitrogen adsorption technique, scanning electron mic roscopy (SEM) and EDAX, and CO-chemisorption. Relations between catalysts p reparation methods and CO2 reforming catalytic activity were established.