Studies of Ceria and Zirconia Promotion of Nickel Catalyst for Carbon Dioxide Reforming of Methane

Abstract

The CO2 reforming reactions of methane were carried out using three types of Ni/δ-Al2O3s and the effects of the addition of CeO2 were examined. In this study, the addition of a high weight percentage of CeO2 focused on reducing the amount of deposited carbon. It was revealed that a high Al2O3 surface area was necessary for the effective reduction of the deposited carbon by the addition of 50% CeO2 with the lowest conversion decrease. The addition of CeO2 and ZrO2 (Ni/Al2O3(A)-CeO2(45)-ZrO2(5)) further decreased the deposited carbon to 0.14 mmol per 1 mol of produced CO at 1073 K.