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초록· 키워드

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Engine-dynamometer experiments covering a wide range of operating conditions were performed for examining the performance of DOC (diesel oxidation catalyst) system. For the fixed two cases of engine speed (1000 and 1500 rpm), the concentrations of CO, HC, Total NOx, NO, and NO₂ were mainly measured at DOC inlet and outlet. Concentration measurements for the emissions were carried out after the system reached its steady-state, and those procedures were repeated with increasing the DOC substrate temperature up to the maximum value of each operating condition. Almost complete conversions of CO were found, and HC conversion efficiencies of 62% to 83% were obtained at all the catalyst temperatures above the light-off. Also, NO and NO₂ conversions showed opposite trends, and only a small amount of the total NOx was reduced over all temperature ranges.

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Abstract
1. INTRODUCTION
2. EXPERIMENTAL TEST SET-UP
3. EXPERIMENTAL PROCEDURES
4. RESULTS AND DISCUSSIONS
5. CONCLUSIONS
Acknowledgements
References

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UCI(KEPA) : I410-ECN-0101-2009-556-017191280