Catalyst coated silicon carbide filters were developed and applied for light-duty and heavy-duty diesel applications. This catalyst coating is suitable also for industrial applications and to be used on cordierite or sintered metal filters. Development activities yield solgel type coating for particulate filters with properties allowing very thin coating, containing metal oxides interacting with active sites, e.g. precious metals (Pt, Pd). A tailored catalyst composition was developed for the catalytic activity and durability in oxidation and soot regeneration reactions. The combination of thermal and catalytic particulate oxidation by oxygen and NO2 was investigated using different regeneration strategies in engine exhaust and laboratory conditions. The passive regeneration by NO2 initiated around 310°C with CPF only. One of the main targets was to lengthen the intervals between active regeneration phases by catalyzed particulate filters which enhance passive regeneration properties. The catalytic coating is a way to promote the active regeneration by oxidizing HC and CO emissions caused by fuel injection. The possibility to adjust filtration and pressure drop properties by coating was shown in engine bench experiments. The combination of DOC and CPF with a low Pt loading is a solution to meet future Euro 5 emission limits with NOx calibrated engine. The replacement of platinum partly with palladium was seen as a future application to oxidize HC and CO efficiently with low NO2 emissions.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Catalyzed Particulate Filters for Mobile Diesel Applications


    Additional title:

    Sae Technical Papers


    Contributors:
    Louhelainen, M. (author) / Juvonen, P. (author) / Matilainen, P. (author) / Kinnunen, T. (author) / Maunula, T. (author)

    Conference:

    2007 Fuels and Emissions Conference ; 2007



    Publication date :

    2007-01-23




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Catalyzed particulate filters for mobile diesel applications

    Maunula,T. / Matilainen,P. / Louhelainen,M. et al. | Automotive engineering | 2007


    Catalyzed Particulate Filters for Mobile Diesel Applications

    Maunula, T. / Matilainen, P. / Louhelainen, M. et al. | British Library Conference Proceedings | 2007


    New Catalyzed Cordierite Diesel Particulate Filters for Heavy Duty Engine Applications

    Voss, Kenneth / Wei, Qiang / Tao, Tinghong et al. | SAE Technical Papers | 2003


    New catalyzed cordierite diesel particulate filters for heavy duty engine applications

    Tao,T. / Cutler,W.A. / Voss,K. et al. | Automotive engineering | 2003


    Diesel particulate filters

    Diem,W. | Automotive engineering | 2003