| 초록 |
Nitrogen oxides remain a major source of air pollution. They contribute to photochemical smog, acid rain, ozone depletion, and greenhouse effects. Selective catalytic reduction (SCR) of NO with ammonia in the presence of oxygen is the proven technology for effective removal of NOx from stationary sources. However, there are several problems associated with this process including ammonia slip which may occur when the catalyst deactivates. Other potential problems include corrosion of process equipment when ammonia reacts with SO3 as well as difficulties associated with transporting and handling the ammonia. therefore, a more attractive alternative would be to use a reducing agent such as H2 or CH4 in place of ammonia. In this study, the H2/CH4 mixing gas was used as the reducing agent in order to complement the defect of CH4-SCR and H2-SCR. The characteristics of alumina-supported platinum and cobalt catalysts prepared by co-impregnation method were studied using XRD, XPS and TPR. |
