论文部分内容阅读
A-and B-substituted perovskite catalyst for CPDF,La0.6K0.4 Co03 and LaCoO.8 Fe0.2O3 were prepared by citric method.Morphology,components and structure of catalyst were characterized by Scanning Electron Microscope(SEM),Energy Dispersive Spectrometer(EDS)and X-ray diffraction(XRD).The catalytic activity of catalyst on soot combustion was determined by Thermogravimetry(TG).Results show that the catalyst had good catalytic performance.The ignition temperature of model soot was 342℃ when mixed with A-substituted perovskite catalyst La0.6K0.4CoO3 and 377℃ with B-substituted perovskite catalyst LaCo0.8Fe0.2O3,while 595℃ of model soot without catalyst.The catalytic activity can be attributed to the catalyst endowed model soot with lower combustion activation energy.Therefore,these substituted perovskites may be good candidates of noble metal for CPDF.