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논문 기본 정보

자료유형
학술저널
저자정보
Myung-Whan Bae (경상대학교) Syaiful (경상대학교) Yoshihiro Mochimaru (Tokyo Institute of Technology)
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제34권 제3호
발행연도
2010.5
수록면
360 - 368 (9page)

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A SCR catalytic filter system is used for reducing NOx and soot emissions simultaneously from diesel combustors. The amount of ammonia (as a reducing agent) must be controlled with the amount of NOx to obtain an optimal NOx conversion. Hence, gas mixing between ammonia and exhaust gases is vital to ensure that the SCR catalyst is optimally used. If ammonia mass distribution is not uniform, slip potential will occur in rich concentration areas. At lean areas, on the other hand, the catalyst is not fully active. The better mixing is indicated by the higher uniformity of ammonia mass distribution which is necessary to be considered in SCR catalytic filter system. The ammonia mass distributions are depended on the flow field of fluids. In this study, the velocity field of gaseous flow is investigated to characterize the transport of ammonia in SCR catalytic filter system. The influence of different injection placements on the ammonia mass distribution is also discussed. The results show that the ammonia mass distribution is more uniform for the injector directed radially perpendicular to the main flow of inlet at the gravitational direction than that at the side wall for both laminar ( Re = 640) and turbulent flows ( Re = 4255). It is also found that the mixing index decreases as increasing the heating temperature in the case of ammonia injected at the side wall.

목차

Abstract
1. Introduction
2. SCR Catalytic Filter System and Geometric Model
3. Numerical Method
4. Results and Discussion
5. Conclusions
Acknowledgement
References
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UCI(KEPA) : I410-ECN-0101-2010-559-002847086