Novel Nickel-and Magnesium-Modified Cenospheres as Catalysts for Dry Reforming of Methane at Moderate Temperatures

International audienceCenospheres from coal fly ashes were used as support in the preparation of Ni-Mg catalysts for dry reforming of methane. These materials were characterized by means of XRD, H 2-temperature-programmed reduction (H 2-TPR), CO 2-temperature-programmed desorption (CO 2-TPD), and low-temperature nitrogen sorption techniques. The cenosphere-supported catalysts showed relatively high activity and good stability in the dry reforming of methane (DRM) at 700 • C. The catalytic performance of modified cenospheres was found to depend on both Ni and Mg content. The highest activity at 750 • C and 1 atm was observed for the catalyst containing 30 wt % Mg and 10, 20, and 30 wt % Ni, yielding to CO 2 and CH 4 conversions of around 95%