메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색
질문

논문 기본 정보

자료유형
학술대회자료
저자정보
Syaiful (경상대학교) Myung-whan Bae (경상대학교)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2009년 학술대회 및 전시회
발행연도
2009.11
수록면
25 - 32 (8page)

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색
질문

이 논문의 연구 히스토리 (5)

초록· 키워드

오류제보하기
Selective catalytic reduction (SCR) and diesel particulate filter (DPF) are a potential way to diminish NO<SUB>x</SUB> and soot emissions from exhaust gas of diesel combustors, respectively. The use of these methods in the automotive application requires more space and has a higher pressure drop. SCR catalytic filter system is a novel exhaust gas after-treatment method that can reduce NO<SUB>x</SUB> and soot emissions simultaneously. This device can save space and the use of SiC DIA-Schumalith filter has a low pressure drop. As generally SCR device, the performance of SCR catalytic filter system depends on the various additional factors. Two factors discussed in this study are uniformity of flow which corresponds to the homogeneity of NH3/NO<SUB>x</SUB> mixture, and the catalyst surface temperature which is important factor to achieve an optimal NO<SUB>x</SUB> conversion. The amount of ammonia must be controlled with the amount of NO<SUB>x</SUB>. If the amount of ammonia is much higher than that of NO<SUB>x</SUB>, the ammonia slip will be formed. On the other hand, if the amount of ammonia is less than that of NO<SUB>x</SUB>, the catalyst is not fully active. Therefore, a uniformity of ammonia mass distribution is studied numerically in this paper in which it depends on the velocity field of gaseous flow in SCR device. As the ammonia mass distribution, a temperature distribution in SCR device is discussed in this study to reach the working temperature of catalyst used in the SCR catalytic filter system. A heater is set up at the bottom wall of SCR device to adjust the temperature of gaseous flow in the range of working temperature. However, the heat addition influences the velocity field of gaseous flow in SCR device and affects the ammonia mass distribution, eventually. Hence, the effect of heat addition on the uniformity of ammonia mass distribution is investigated in this paper. 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 turbulent flows (Re = 4255). The injection placement has a small effect on the uniformity of ammonia mass distribution in the case of laminar flow (Re = 64). It is also found that the mixing index decreases as increasing the heating temperature in the case of ammonia injected at the side wall. The result also shows that the catalyst surface temperature at the laminar flow is higher than that at turbulent flow.

목차

Abstract
1. INTRODUCTION
2. SCR CATALYTIC FILTER DEVICE
3. NUMERICAL METHOD
4. RESULTS AND DISCUSSION
5. CONCLUSION
ACKNOWLEDGEMENT
REFERENCES

참고문헌 (0)

참고문헌 신청

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!

이 논문의 저자 정보

이 논문과 함께 이용한 논문

최근 본 자료

전체보기

댓글(0)

0

UCI(KEPA) : I410-ECN-0101-2010-556-002776423