While emission standards are becoming more stringent with every new legislation level, the engineering of compact aftertreatment system is becoming extremely challenging. This paper outlines a road map for cost-effective, compact aftertreatment systems through use of catalysts with standard and structured foil substrates. The longitudinal-structure (LS) foil disrupts laminar flow regimes within channels enhancing mass transfer and gas reconditioning.The presented results were applied to DOC catalyst functionality including parameters such as cross-section, substrate type and substrate volume.The catalysts were degreend and tested on a production 15ltr ISX Cummins engine calibrated for US 1998 emissions. Various load points were selected to determine catalyst performance as a function of exhaust gas temperature, exhaust flow rate (space velocity) and exhaust gas composition. A HC injector system was used to characterize oxidation performance at various concentration levels.The presented results show the trade-off between converter efficiency in mass transfer limited catalyst function and back pressure. The LS-Metalit showed superior performance with high potential for down sizing based on a high volumetric efficiency.


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    Titel :

    Structured Foil Catalysts: A Road Map to Highly Effective, Compact Systems Aftertreatment


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Müller-Haas, Klaus (Autor:in) / Downey, Markus (Autor:in) / Diewald, Robert (Autor:in) / Radovanovic, Rod (Autor:in) / Park, Talus (Autor:in)

    Kongress:

    Powertrain & Fluid Systems Conference and Exhibition ; 2007



    Erscheinungsdatum :

    29.10.2007




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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