Catalytic reforming of biogas for syngas production: a study of stability and carbon deposition

Co _x Ni _y Mg _z Al ₂ catalysts synthesized by coprecipitation method using layered double hydroxides precursors were studied in the dry reforming of biogas. After calcination and reduction at 800°C, stability tests were performed for 12h at temperatures higher than 700°C. This series of tests was done to determine the effect of the bivalent cation on catalytic activity and stability. Fresh and used catalysts were characterized using XRD, DTA/TG, TPO and SEM-EDX. All catalysts were active in the dry reforming of methane reaction. Results show different impact on catalytic efficiency depending on atomic composition of catalyst. Catalytic stability tends to be increased in the presence of magnesium rich catalysts.