Mechanism of Catalytic Oxidation of NO over Mn-Co-Ce-Ox Catalysts with the Aid of Nonthermal Plasma at Low Temperature

NO catalytic oxidation performances have been investigated on a Mn-Co-Ce-Ox catalyst by using nonthermal plasma (NTP) reactor: the PRFC reactor. In the PRFC system, the plasma reactor was followed by the catalyst. The results showed that the NO catalytic oxidation of the Mn-Co-Ce-Ox catalyst was significantly enhanced by the nonthermal plasma in the PRFC system at the temperature range of 50-250 degrees C. The oxidation capability of the catalyst was improved with the increase of the input energy density in the PRFC system. It was also found that the activity was suppressed when SO2 was present in the reaction mixture, whereas the catalytic oxidation ability was obviously enhanced under the NTP-assist, because NTP system is conducive to synchronous SO2 removal. The antipoisoning performance and NO catalytic oxidation capacity of this mechanism are superior to those of others reported in the literature.