Studies on the reaction mechanism of CO2-reforming of methane over Co/gamma-Al2O3 catalyst

TPPR and XPS characterizations were combined to study the reaction mechanism of CO2-reforming of methane to syngas over Co/gamma-Al2O3 catalysts. CH4 shows a tendency to form surface carbons by deep dissociation at high temperatures, CO2 dissociation reaction also occurs at >673K. It is believed that carbide carbons are active species to generate CO by reacting with O atoms dissociated from CO2. In the reaction, Co-(0) particles are responsible for dissociating CH4 to form active C, abstracting an O atom from CO2, molecule, and transferring O atom to C to form CO.