Catalytic dry reforming of methane over high surface area ceria

In particular, the dry reforming rate over CeO2 (HSA) is proportional to the methane partial pressure and the operating temperature. Carbon dioxide presents weak positive impact on the methane conversion, whereas both carbon monoxide and hydrogen inhibit the reforming rate. The activation energies and reforming rates under the same methane concentration for CeO2 toward the dry reforming are almost equal to the steam reforming as previously reported [1], [2], [3], [4]. This result suggests the similar reaction mechanisms for both the steam reforming and the dry reforming over CeO2; i.e., the dry reforming rate is governed by the slow reaction of adsorbed methane, or surface hydrocarbon species, with oxygen in CeO2, and a rapid gas-solid reaction between CO2 and CeO2 to replenish the oxygen.