디젤 엔진에서 금속 폼을 적용한 SCR 촉매의 특성 분석 (Characteristic analysis of a SCR system using a metal foam in Diesel Engines)

서지정보

· 발행기관 : 한국분무공학회
· 수록지 정보 : 한국분무공학회지 / 18권 / 4호 / 196 ~ 201페이지
· 저자명 : 김용래, 최교남

초록

SCR(Selective Catalytic Reduction) is a major after-treatment solution to reduce NOx emission in recent diesel engines. In this study, a metal foam is applied as an alternative SCR substrate and tested in a commercial diesel engine to compared with a conventional ceramic SCR system. Basic engine test from ND-13 mode shows that a metal foam catalyst has lower NOx conversion efficiency than a ceramic catalyst especially over 350℃. A metal foam catalyst has characteristics of high exhaust gas pressure before a SCR catalyst and high heat transfer rate due to its material and structure. NOx conversion efficiency of a metal foam catalyst shows an increasing tendency along with the increase of exhaust gas temperature by 500℃. The effect of urea injection quantity variation is also remarkable only at high exhaust gas temperature.

영어초록

SCR(Selective Catalytic Reduction) is a major after-treatment solution to reduce NOx emission in recent diesel engines. In this study, a metal foam is applied as an alternative SCR substrate and tested in a commercial diesel engine to compared with a conventional ceramic SCR system. Basic engine test from ND-13 mode shows that a metal foam catalyst has lower NOx conversion efficiency than a ceramic catalyst especially over 350℃. A metal foam catalyst has characteristics of high exhaust gas pressure before a SCR catalyst and high heat transfer rate due to its material and structure. NOx conversion efficiency of a metal foam catalyst shows an increasing tendency along with the increase of exhaust gas temperature by 500℃. The effect of urea injection quantity variation is also remarkable only at high exhaust gas temperature.

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