NH₃-SCR 촉매를 이용한 디젤기관에서의 NOx 저감에 관한 연구 = A Study about NOx Reduction of the NH₃-SCR catalyst for a Diesel engine

다국어 초록 (Multilingual Abstract)

Diesel engines provide merits in the aspect of higher thermal efficiency and less CO₂ emission, but more problems on PM and NOx emissions. Selective Catalyst Reduction(SCR) technology is well-known to be effective for the reduction of NOx emission. SCR system can be classified into three kinds of NSR, NH₃-SCR and HC-SCR depending on reducing agents in jet spray. Because of poisoning problem of sulfur and unstable gas condition, much stable Urea-SCR system has been preferred to use instead. However, this research used to NH₃ gas instead Urea solution to model gas test. It is general to use NH₃-SCR catalyst for the NOx reduction on a diesel engine. This research focuses on the effects of gas temperature, SV(space velocity) and AR(aspect ratio) of NOx reduction rate. In this experiment was used the model gas which is similar to a diesel exhaust gas. NOx conversion rate is higher than 90% at the temperature of near 400℃ for all cases. As SV is lower, NOx conversion rate is decreased. On the contrary, as AR is higher, NOx conversion rate is increased.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. NOx 생성 및 저감원리
• 3. 실험 장치
• 4. 실험방법
• 5. 실험결과 및 고찰
• 6. 결론
• 후기
• References