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상용차용 요소-선택환원촉매 시스템의 탈질성능에 관한 연구
한평현(Pyung Hyun Han),김규홍(Gyu Hong Kim),길정기(Jeong Ki Kil),여권구(Gwon Koo Yeo) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The effect of various factors on NOx conversion was investigated for urea-SCR, the selective catalytic reduction using urea as reducing agent. Zeolite-based SCR catalysts were tested in the ESC test cycle using a 4L diesel engine, with and without diesel oxidation catalyst. The theoretical maximum NOx conversion was considered based on the SCR kinetics and it was compared with the NOx conversions obtained experimentally on various experimental conditions. NH₃/NOx ratio, NO₂/NOx ratio and reaction temperature are the main factors affecting the DeNOx performance of SCR system. Additionally, the distance between urea dosing point and SCR catalyst significantly influences the performance of SCR catalyst.