Properties of DPF System Using Perovskite Catalysts Supported on ZrO2/SiC Fibers

Diesel engine, which is widely used as a power plant for trucks and buses, is most efficient internal combustion engine. However, it generates a large amount of particulate matter (PM) and NOx. Diesel particulate filter (DPF) system is expected to be an effective tool to reduce PM and NOx emissions, but it is far from practical use because of clogging and low heat-resistance. In this work, ZrO2/SiC felt which supported perovskite oxide catalyst is employed as a filter material, and the performances of the new DPF system to reduce PM and NOx emissions were evaluated. As a result, La0.9K0.1CoO3 supported by alkoxide method exhibited promising performance to reduce PM and NOx emissions, and Pt on the perovskite oxide enhanced the PM oxidation performance at about 500°C.