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STATIC CHARACTERISTICS OF A UREA-SCR SYSTEM FOR NOx REDUCTION IN DIESEL ENGINES  

Nam, J.G. (Division of Marine Engineering, Mokpo National Maritime University)
Publication Information
International Journal of Automotive Technology / v.8, no.3, 2007 , pp. 283-288 More about this Journal
Abstract
This paper presents the static characteristics of a urea-SCR system. The static characterization of the urea-SCR system was generated by sweeping urea flow rates at common engine torque/speed operating points. Several experiments were performed using engine operating points at different raw NOx emission levels, space velocities, and SCR catalyst temperatures. The recorded NOx emissions from the engine exhaust outlet and engine tailpipe are then compared. The urea-SCR static system results indicated that a $50{\sim}60%$ NOx conversion is achievable at most engine operating points using the stoichiometric $NH_3/NOx$ ratio, and a high 98% NOx conversion is possible by exceeding the stoichiometric $NH_3/NOx$ ratio. The effect of the pre-oxidation catalyst volume was also investigated and found to have a profound impact on experimental results, particularly the static NOx conversion.
Keywords
Space velocity; Stoichiometric $NH_3/NOx$ ratio; Pre-oxidation catalyst; Static NOx conversion;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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1 Gieshoff, J., Schäfer-Sindlinger, A., Spurk, P. C., Van Den Tillaart, J. A. A. and Garr, G. (2000). Improved SCR systems for heavy duty applications. SAE Paper No. 2000-01-0189
2 Helden, R. Van, Genderen, M. Van, Aken, M. Van, Verbeek, R., Patchett, J., Kruithof, J., Straten, T. and Gerentet de Saluneaux, C. (2002). Engine dynamometer and vehicle performance of urea SCR-system for heavy-duty truck engines. SAE Paper No. 2002-01-0286
3 Kowalewicz, A. (2001). Lean-burn engine-potential analysis. Int. J. Automotive Technology 2, 4, 147-155
4 Walker, A. P., Balkeman, P. G., Ilkenhans, T., Magnusson, B., McDonald, A. C., Kleijwegt, P., Stunnenburg, F. and Sanchez, M. (2004). The development and in-field demonstration of highly durable SCR catalysts systems. SAE Paper No. 2004-01-1289
5 Tennison, P., Lambert, C. and Levin, M. (2004). NOx control development with urea-SCR on a diesel passenger car. SAE Paper No. 2004-01-1291
6 Lee, C. H. and Choi, B. C. (2005). Evaluation of NOx reduction catalyst by model gas for lean-burn natural gas engine. Int. J. Automotive Technology 6, 6, 591-598   과학기술학회마을
7 Blakeman, P. G., Chandler, G. R., John, G. A. and Wilkins, A. J. (2001). Investigations into NOx after treatment with urea SCR for light-duty diesel vehicles. SAE Paper No. 2001-01-3624