Catalytic N2O Decomposition over Cu/Mn/Zn Doped Ceo2 Composite Oxides

Cu/Mn/Zn oxides were firstly prepared by coprecipitation with molar ratio of Cu/Zn, 0.17, and Mn/(Cu+Zn) by 0.0 similar to 0.06, respectively. The temperature of N2O conversion ca. 10% over Cu/Zn and Cu/Mn-0.03/Zn was 370 degrees C and 325 degrees C, respectively, by using 6.8(v)% N2O+balanced N-2, and GHSV of 30000h(-1), indicating the addition of manganese oxide could improve Cu/Zn oxide activity on N2O decomposition. The Cu/Mn/Zn doped CeO2 composite oxides were further prepared with molar ratio of Ce/Cu by 0.0 similar to 1.4. The temperature of N2O conversion ca. 10% over Ce-1.0/Cu/Mn-0.03/Zn was 260 degrees C as same conditions applied over Cu/Zn and Cu/Mn-0.03/Zn samples. Stability test by using simulated mixture, 6.8(v)% N2O+5.0(v)% O-2+3.0(v)% H2O+balanced N-2, 580 degrees C, GHSV of 30000h(-1), showed that N2O conversion remained stable. Characterization demonstrated that the synergistic action of active components was the main origin of Ce-1.0/Cu/Mn-0.03/Zn sample had good performance on N2O abatement.