[가솔린엔진부문] 저공해 자동차용 신 삼원촉매의 개발에 관한 연구

The research was conducted to develop a new three-way catalyst which has better low temperature activity and durability than current ones. Honeycomb type catalysts with different Rh/Pd, Rh/Pd/Pt loading ratios were tried in this experiment Conversion effectiveness of each catalyst was measured as a function of temperature and redox ratio using a model gas test bench. In addition, a single cylinder gasoline engine was used to find the conversion characteristics for THC, CO and CO2. The conversion characteristics for LIHCs(CI-C6) were also analyzed. Catalyst with Rh/Pd=1/18 loading ratio showed the best conversion effectiveness among the eight catalysts, and the light-off temperature of this catalyst was 26℃ for 50% THC conversion