승용디젤엔진의 운전 조건 및 분사 조건 변경에 따른 Urea-SCR 시스템의 NOx 전환효율에 관한 연구Investigation on the DeNOx Efficiency in Urea-SCR System at Various Operating Conditions and Injection Characteristics for a Passenger Diesel Engine
- Other Titles
- Investigation on the DeNOx Efficiency in Urea-SCR System at Various Operating Conditions and Injection Characteristics for a Passenger Diesel Engine
- Authors
- 홍길화; 황인구; 명차리; 박심수
- Issue Date
- 2009
- Publisher
- 대한기계학회
- Keywords
- SCR(선택적 촉매 저감법); Urea(요소); DCU(요소 분사 및 제어 장치); NOx(질소산
화물); Passenger Diesel Engine(승용디젤엔진)
- Citation
- 대한기계학회논문집 B, v.33, no.12, pp.952 - 960
- Indexed
- SCOPUS
KCI
- Journal Title
- 대한기계학회논문집 B
- Volume
- 33
- Number
- 12
- Start Page
- 952
- End Page
- 960
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/120982
- ISSN
- 1226-4881
- Abstract
- Selective Catalytic Reduction (SCR) system is a high-effective NOx reduction technology in diesel
engines. As the emission standard of diesel engines is more stringent, vehicle manufactures makes
efforts on emission technologies. This paper discusses the performance of Urea-SCR system according
to the engine operating conditions in a passenger diesel engine. Engine test results in this paper show
that it is important to consider the catalyst temperature and space velocity to obtain high NOx
conversion efficiency. In condition of high catalyst temperature, over 90% NOx conversion efficiency is
indicated. However, when catalyst temperature is low, NOx conversion efficiency was decreased. Also,
it was shown that space velocity mainly effects on the DeNOx performance under 220 degree celsius
of SCR catalyst temperature. As the urea injection pressure was decreased, NOx conversion efficiency
was declined. It is concerned about urea droplet atomization. This work shown in this paper can lead
to improved overall NOx conversion efficiency.
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