Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Performance Modeling of the Lean NOx Trap Catalyst with GT-POWERTM

GT-POWERTM를 이용한 Lean NOx Trap 촉매 성능 모델링

  • Kim, Hyunjun (Graduate School of Mechanical and Automotive Engineering, Keimyung University) ;
  • Han, Manbae (Department of Mechanical and Automotive Engineering, Keimyung University) ;
  • Jeon, Ji-Yong (R&D Center, E&D Corporate Ltd.) ;
  • Kim, Tae-Min (R&D Center, E&D Corporate Ltd.)
  • 김현준 (계명대학교 대학원 기계자동차공학과) ;
  • 한만배 (계명대학교 기계자동차공학과) ;
  • 전지용 (이엔드디 기술연구소) ;
  • 김태민 (이엔드디 기술연구소)
  • Received : 2013.02.01
  • Accepted : 2013.03.26
  • Published : 2013.11.01
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Abstract

In this study we designed a lean $NO_x$ trap (LNT) model with $GT-POWER^{TM}$ program and then the LNT model was compared to the bench flow reactor test results. This model consists of 9 kinetic reactions to represent the main steps of NO oxidation, $NO_x$ adsorption, $NO_x$ release and then its reduction. The comparison was performed on the operating conditions at the space velocity of 50,000 1/hr and 80,000 1/hr with the temperature range of $200^{\circ}C{\sim}500^{\circ}C$ with the even spaced temperature step of $50^{\circ}C$. The experimental results show that the $NO_x$ conversion efficiency was enhanced by the temperature up to $350^{\circ}C$ and then decayed at higher temperatures. The LNT model predicts the similar trend of the $NO_x$ conversion efficiency to the experimental results below $350^{\circ}C$, but overestimates above $350^{\circ}C$. This overestimation comes from the higher reduction efficiency which was obtained by the different reduction gas composition such as $C_3H_6$ in the model to replace $CH_4$, $C_2H_4$ in the bench test.

Keywords

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