LaMnO₃형 페롭스카이트 산화물에서 입자상물질의 촉매연소반응 = Catalytic Combustion of Carbon Particulate over LaMnO₃ Perovskite-Type Oxides

다국어 초록 (Multilingual Abstract)

We have studied the catalytic combustion of soot particulates over perovskite-type oxides prepared by malic acid method. The catalysts were modified to enhance the activity by substitution of metal into A or B site of perovskite oxide. In addition, the reaction conditions such as temperature and O₂ concentration were investigated. The partial substitution of alkali metals into A site in the LaMnO₃ catalyst, enhanced the catalytic activity in the combustion of carbon particulate and the activity was shown in the order: Cs＞K＞Na. For the La_(i_x)Cs_(X)MnO₃ catalysts, the catalytic activity showed the maximum value with x=0.3 but no more increase on the catalytic activity was shown with x＞ 0.3. For the La_(0.8)Cs_(0.2)MnO₃ catalyst, the substitution of Fe or Ni increased the ignition temperature. The ignition temperature decreased with an increase of O₂ concentration, however, no more increase in the catalytic activity was shown with O₂ concentration ＞0.2. The introduction of NO into reactants showed no effect on the catalytic activity.