Carbon dioxide reforming of methane on modified Ni/α-A1 2O 3 catalysts

Abstract

We have studied the CO 2-reforming of methane at atmospheric pressure in the range temperature 550–730°C on Ni/α-A1 2O 3 catalysts modified by Fe, Co, Cu and Ce, respectively. The obtained results show that the activities depend on the CO 2/CH 4 ratio, the nature of the metal additives and the reaction temperature. The order of activity is Ni, NiCo, NiCe > NiCu〉 NiFe. The effect of the additives is attributed to their interaction with the nickel supported active phase. When CH 4 is replaced by H 2 in the presented reaction, no effect of the metal additives on the activities is observed and the CO 2 conversions are sensibly lower. These results let us think that the contribution of the reverse gas shift reaction is less important than expected in the overall process of the methane CO 2-reforming.