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http://dx.doi.org/10.9726/kspse.2013.17.1.019

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)
Publication Information
Journal of Power System Engineering / v.17, no.1, 2013 , pp. 19-26 More about this Journal
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
Diesel engine; Catalyst; NOx; LNT(Lean NOx Trap); SCR(Selective Catalytic Reduction);
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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