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NO x reduction in the exhaust of mobile heavy-duty diesel engines by urea-SCR

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Abstract

A DeNO x demonstration system for a diesel engine used in construction machineries and mobile cranes was setup. In preliminary experiments various extruded and coated SCR catalysts were evaluated with and without oxidizing pre-catalyst. The data from stationary tests with two selected catalysts were used to establish various model-based control algorithms for the optimum dosage of urea in the ESC and ETC. A NO x conversion of >93% at <10 ppm average ammonia slip could be achieved at a converter-to-swept volume ratio of <2.0.

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Authors and Affiliations

  1. Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland

    M. Koebel, M. Elsener & O. Kröcher

  2. Measurement and Control Laboratory, Swiss Federal Institute of Technology, CH-8092, Zurich, Switzerland

    Ch. Schär

  3. Liebherr Machines Bulle SA, CH-1630, Bulle, Switzerland

    R. Röthlisberger & F. Jaussi

  4. Oberland Mangold GmbH, D-82467, Garmisch-Partenkirchen, Germany

    M. Mangold

Authors
  1. M. Koebel
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  2. M. Elsener
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  3. O. Kröcher
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  4. Ch. Schär
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  5. R. Röthlisberger
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  6. F. Jaussi
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  7. M. Mangold
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Koebel, M., Elsener, M., Kröcher, O. et al. NO x reduction in the exhaust of mobile heavy-duty diesel engines by urea-SCR. Topics in Catalysis 30, 43–48 (2004). https://doi.org/10.1023/B:TOCA.0000029726.38961.2b

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  • DOI: https://doi.org/10.1023/B:TOCA.0000029726.38961.2b

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