한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제16권4호
  • /
  • Pages.110-119
  • /
  • 2008
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  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

DOC-DPF-SCR 시스템에 의한 디젤 배기 내 $NO_x$, 입자상 물질 저감 과정의 일관 모델링 및 성능 예측

Unified Modeling and Performance Prediction of Diesel $NO_x$ and PM Reduction by DOC-DPF-SCR System

  • 정승채 (연세대학교 기계공학과 대학원) ;
  • 윤웅섭 (연세대학교 기계공학과)
  • Jung, Seung-Chai (Department of Mechanical Engineering, Graduated School, Yonsei University) ;
  • Yoon, Woong-Sup (Department of Mechanical Engineering, Yonsei University)
  • 발행 : 2008.07.01
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초록

Computer methods with simplified mathematical models in conjunction with empirical model parameters can be efficiently practiced into an optimization of a diesel aftertreatment system. Components of prime interests are diesel particulate filter, diesel oxidation catalyst and de-$NO_x$ catalytic converter. de-$NO_x$, de-PM, and de-HC processes in each part are individually modeled, formulated and then combined into an integrated analysis procedure for a unified simulation of the diesel emission aftertreatment. The model is empirically tuned and validated with comprehensive engine and laboratory data. The effects of emission species and space velocity on the $NO_x$ and soot reductions are parametrically investigated. A lowered $NO_2/NO_x$ ratio due to PM oxidation in DPF contributes to promote the $NO_x$ reduction by SCR at intermediate gas temperatures. $NO_x$ reduction is inert to the PM oxidation at high temperatures. Rate of PM trapping strongly depends on temperature and $NO_x$ concentration.

키워드

참고문헌

  1. J. H. Johnson, S. T. Bagley, L. D. Gratz and D. G. Leddy, "A Review of Diesel Particulate Control Technology and Emissions Effects- 1992 Horning Memorial Award Lecture," SAE 940233, 1994
  2. K. H. Kim, G. J. Ahn, K. W. Kang, S. W. Lee, D. S Eom and T. Y. Lee, "A Study of Unregulated Emission Reduction Characteristics by Diesel Oxidation Catalyst(DOC) for Light- Duty Diesel Engine," Transactions of KSAE, Vol.14, No.2, pp.145-150, 2006
  3. http://www.dieselnet.com/tg.html
  4. M. Koebel, G. Madia and M. Elsener, "Selective Catalytic Reduction of NO and $NO_2$ at Low Temperatures," Catalysis Today, Vol.73, No.3-4, pp.239-247, 2002 https://doi.org/10.1016/S0920-5861(02)00006-8
  5. M. Koebel, M. Elsener and G. Madia, "Reaction Pathways in the Selective Catalytic Reduction Process with NO and $NO_2$ at Low Temperatures," Ind. Eng. Chem. Res., Vol.40, No.1, pp.52-59, 2001 https://doi.org/10.1021/ie000551y
  6. I. P. Kandylas and G. C. Koltsakis, "$NO_2$- Assisted Regeneration of Diesel Particulate Filters: A Modeling Study," Ind. Eng. Chem. Res., Vol.41, No.9, pp.2115-2123, 2002 https://doi.org/10.1021/ie010842m
  7. E. J. Bissett, "Mathematical Model of the Thermal Regeneration of a Wall-flow Monolith Diesel Particulate Filter," Chemical Engineering Science, Vol.39, No.7-8, pp.1233-1244, 1984 https://doi.org/10.1016/0009-2509(84)85084-8
  8. I. P. Kandylas, O. A. Haralampous and G. C. Koltsakis, "Diesel Soot Oxidation with $NO_2$: Engine Experiments and Simulation," Ind. Eng. Chem. Res., Vol.41, No.22, pp.5372-5384, 2002 https://doi.org/10.1021/ie020379t
  9. C. Winkler, P. Florchinger, M. D. Patil, J. Gieshoff, P. Spurk and M. Pfeifer, "Modeling of SCR DeNOx Catalyst - Looking at the Impact of Substrate Attributes," SAE 2003-01-0845, 2003
  10. S. C. Jung and W. S. Yoon, "The Effect of an Oxidation Precatalyst on the $NO_X$ Reduction by $NH_3$-SCR Process in Diesel Exhaust," Transactions of KSAE, 2008 (Accepted)
  11. J. Gieshoff, A. Schafer-Sindlinger, P. C. Spurk, J. A. A. van den Tillaart and G. Garr, "Improved SCR Systems for Heavy Duty Applications," SAE 2000-01-0189, 2000