Carbon-Catalyzed Decomposition of Methane in the Presence of Carbon Dioxide

Abstract

Catalytic decomposition of methane is considered as a prospective pro-ecological method of hydrogen production. The main drawback of this method is fast deactivation of the catalyst by an inactive carbonaceous deposit formed in the reaction. In this study, a series of experiments have been made to check the effect of the presence of carbon dioxide in the reaction system on the reduction of the catalyst deactivation. The reaction of methane decomposition was carried out in two variants for 4 h in the presence of a carbon catalyst obtained from pine wood biomass. In the first variant, CO2 and methane were alternately dosed into the reaction system, while in the second variant, CO2 and methane were introduced simultaneously. The second variant reaction was performed at three temperatures, 750, 850, or 950 °C, and for the reaction mixture containing 5−50% CO2, while in the first variant reaction, the methane decomposition and the catalyst regeneration by CO2 were carried out at the same (750, 850, or 950 °C) ...