Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Volume Optimization of a Combined System of LNT and SCR Catalysts Considering Economic Feasibility and De-NOx Performance

  • Seo, Choong-Kil (Department of Automative & Mechanical Engineering, Howon University) ;
  • Choi, Byung-Chul (School of Mechanical System Engineering, Chonnam National University) ;
  • Kim, Young-Kwon (Gwangju Center, Korea Automotive Technology Institute)
  • Received : 2012.08.14
  • Accepted : 2012.12.20
  • Published : 2013.02.28
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Abstract

The purpose of the study is carried out volume optimization of a combined system consisting of an LNT and SCR catalysts from the standpoint of its economic feasibility and de-NOx performance. Under the rich air-fuel ratio conditions for 5s (${\Phi}$=1.1), CO, $H_2$ and THC were generated at levels of 4%, 1.2% and $110ppmC_1$, respectively. The NOx conversion of the 1+1 combination was 5% lower than that of the 1.5+0.5 combination, however the reduced volume of the LNT catalyst decreased the total cost by about 6%. Therefore, the optimal volume ratio of the LNT and SCR catalysts was found to be the 1+1 catalyst combination, which has the highest total score in the terms of an economic feasibility and the NOx performance.

Keywords

References

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