| 초록 |
Annually, Greenhouse gas emissions by nature and anthropogenic source have been increased. Among these gases, N2O has a high global warming potential (GWP) which is 310 times higher than that of CO2. Therefore it is required to remove N2O in aerosphere. It is reported that Co3O4 is active for N2O decomposition due to its relatively high redox ability. However, Cobalt spinel synthesized by the co-precipitation method was significantly deactivated by NO at low temperature (below 400 °C). Many researchers reported that competitive adsorption between NO and N2O inhibit the catalytic activity for N2O decomposition. In order to overcome this phenomena, Co-Cu catalyst was prepared by co-precipitation method. This catalyst showed high activities in the presence of NO. The modified cobalt catalysts exhibit slightly decreased N2O conversion compared to that of Co3O4 at low temperature when NO is introduced into reactor. To identify this phenomena, the prepared catalysts were characterized by XRD, BET, H2-TPR, O2-TPD, NO-TPD and XPS. |
