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SCR촉매 열화도에 따른 암모니아 목표흡장량 다원화를 위한 SCR aging factor 개발
김희중(Huijung Kim),김미진(Mijin Kim),서형만(Hyongman Seo),김영진(Youngjin Kim),김평순(Pyungsoon Kim) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
NOx conversion efficiency of Cu-Zeolite SCR catalysts in diesel engines decreases as the catalyst aging progresses. In order to optimize the NOx conversion performance, it is necessary to apply various NH₃ storage amount suitable for degree of aging of the catalyst. In this study, sensitivity coefficient for SCR is derived and by using this coefficient, the amount of NH₃ storage can be calculated according to thermal load. Finally, the development of SCR aging factor for predicting NH₃ storage amount according to degree of catalyst aging was improved NOx conversion performance at real road driving exhaust gas test