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[디젤엔진부문] 금속 산화물 촉매를 이용한 디젤엔진 배기가스중 질소산화물 촉매환원에 관한 연구
채재우(Jaeou Chae),황재원(Jaewon Hwang),문승일(Seugil Moon),정지용(Jeeyong Jung),한정희(Junghee Han),황화자(Hwangja Hwang),김석(Seok Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, a number of supported metal oxides and perovskite type catalysts were investigated for the NOx reduction from the diesel engine exhaust gas. All catalysts were made into pellets type with diameter of 3~4 mm alumina(Al₂O₃) as a supporter. These samples were tested by real diesel exhaust gas which contains CO, hydrocarbons and soot in the temperature range of 150~550℃ with the 3300h-1 space velocity (SV). Among the results, several promising catalysts showed NOx conversion above 50% in the temperature range of 150~350℃ From these results, supported metal oxides catalysts and perovskite type could be recommended for the practical application to the automobile exhaust treatments.
[디젤엔진부문] 플라즈마 반응기 형상 변화에 따른 디젤엔진 배기가스중의 NOx 저감에 관한 실험적 연구
채재우(Jaeou Chae),황재원(Jaewon Hwang),정지용(Jeeyong Jung),손창업(Changeob Son),한정희(Junghee Han),김웅혁(Xianonghe Jin),황화자(Hwanja Hwang),전정규(Jeongkyu Jeon) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The direct current(DC) corona discharge has been tested for removal of NO in diesel engine variation with plasma reactors. Each reactor has their own voltage-current characteristics. The results of laboratory experiments show that the DC corona discharge can remove NO with small energy consumption respectively. However, the removal efficiencies in the region of high temperature were not enough to apply to vehicle. Because of the limitation of input energy density. Therefore, it is possible to increase the input energy density using by changing of reactor geometry. This study shows that NO removal efficiency is sensitive to changing the reactor
디젤기관과 촉매코팅필터를 이용한 NOx와 Soot의 동시저감에 관한 연구
채재우(JaeOu Chae),박창하(Changha Park),문승일(Seungil Moon),Vladimir Demidiouk,이대엽(Daeyup Lee),정태균(Taegyun Jung) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
Recently, for the past ten years(1990-2000), the pollutant control of emitting exhaust gas for vehicles with internal engines has became more strict. The main harmful components of the pollutants in the exhaust gas of diesel engines are NOx, PM, HC and CO. Numerous researches have been made elsewhere in the world to reduce the pollutant components of the exhaust gas. But the problems were not yet cleared industrial for the appliances. Thus, the intensive studies in this fields are still being carried out.<br/> The aim of this study is for the reduction of NOx and Soot using Catalyst Coating Filter (CCF) with the experimental study on the factors which have influence on the continuous regeneration of the filter. The experiments were performed in this work at conditions of load(%) at ; 50, 75, 100, and speed(rpm) at ; 1000, 1250, 1500, 1750.
[디젤엔진부문] 플라즈마를 이용한 승용 디젤자동차에서의 입자상물질 제거
채재우(Jaeou Chae),황재원(Jaewon Hwang),손창업(Changeob Son),정지용(Jiyong Jeong),한정희(Junghee Han),김웅혁(Xiaonghe Jin),황화자(Hwagja Hwang),전정규(Jeongkyu Jeon) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Diesel engine exhaust gas is known to be one cause photochemical smog, which is so damaging to environments, However, because of its high thermal efficiency and economic advantages, the engine is not easily disappear. The purpose of this study was to develop a method for removing the particulate matter(PM) contained in diesel engine exhaust gas using the corona discharge processes. The exhaust gas characteristics and energy density were investigated on the dynamometer test bed and chassis dynamometer with CVS-75 mode with passenger diesel car. It was reported the smoke removal efficiency has around 70% in the dynamometer test with 80W energy consumption and PM removal efficiency has 68% in the real car test. Considering this results, plasma technology is one of the way to simultaneously removing method the diesel particulate matter(DPM).and NOx
[디젤엔진부문] 플라즈마/촉매 복합시스템을 이용한 디젤엔진 배기가스의 저감
채재우(Jaeou Chae),황재원(Jaewon Hwang),정지용(Jeeyong Jung),김관영(Kwanyoung Kim),한정희(Junghee Kim),황화자(Hwanja Hwang),김석(Seok Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, a new plasma/catalyst continuously regenerative hybrid system is introduced to treat diesel particulate matter (DPM). NOx and CO aftertreatment. The catalyst temperature. plasma energy density and exhaust gas characteristics were investigated on the dynamometer test bed. It was reported the smoke removal efficiency has around 70% in the dynamometer test with 80W energy consumption in stationary engine test bed. The plasma/catalyst hybrid system experiments show almost DPM and CO was removed and 30% of NOx removed simultaneously by this system at each engine condition respectively. Considering these results. moreover. in dynamometer experiments show plasma/catalyst continuously regenerative hybrid system is a promising method to regenerate diesel particulate