Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Numerical Modeling of Vanadia-based Commercial Urea-SCR plus DOC Systems for Heavy-duty Diesel Exhaust Aftertreatment Systems

바나듐 기반의 Urea-SCR과 DOC가 결합된 Heavy-Duty 디젤 배출가스 후처리 시스템의 SCR De-NOx 성능 향상에 관한 수치해석 연구

  • Yun, Byoung-Kyu (Department of Aerospace Engineering, Chonbuk National University) ;
  • Kim, Chong-Min (Department of Aerospace Engineering, Chonbuk National University) ;
  • Kim, Man-Young (Department of Aerospace Engineering, Chonbuk National University) ;
  • Cho, Gyu-Baek (Engine Research Team, Korea Institute of Machinery Materials) ;
  • Kim, Hong-Suk (Engine Research Team, Korea Institute of Machinery Materials) ;
  • Jeong, Young-Il (Engine Research Team, Korea Institute of Machinery Materials)
  • 윤병규 (전북대학교 항공우주공학과) ;
  • 김종민 (전북대학교 항공우주공학과) ;
  • 김만영 (전북대학교 항공우주공학과) ;
  • 조규백 (한국기계연구원 그린동력연구팀) ;
  • 김홍석 (한국기계연구원 그린동력연구팀) ;
  • 정용일 (한국기계연구원 그린동력연구팀)
  • Received : 2009.03.23
  • Accepted : 2009.10.04
  • Published : 2010.03.01
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Abstract

In this study, numerical experiments were carried out to estimate the SCR De-NOx performance in DOC plus SCR systems. The SCR De-NOx phenomena are described by Langmuir-Hinshelwood reaction scheme. After validating the present approach by comparing the present results with the experimental results, such various parameters as space velocity, $H_2O$ concentration, $NO_2$/NOx ratio and relative volume of DOC are explored to increase the SCR De-NOx performance. The results indicate that SCR De-NOx performance largely depends on space velocity and $NO_2$/NOx ratio, especially below $200^{\circ}C$. SCR De-NOx performance is seriously affected by relative volume of DOC with SCR due to increasing in $NO_2$/NOx ratio at below $250^{\circ}C$.

Keywords

References

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