The transition from Euro2 to Euro3 emission standards for passenger diesel vehicles requires very good hydrocarbon control coupled with moderate, passive NOx reduction. In some cases, CO and PM conversion is also required. Passive NOx reduction, that is, selective catalytic reduction of NOx by hydrocarbons without delivery of hydrocarbon specifically for this purpose, requires good management of a scarce hydrocarbon resource. At the same time, increased requirements for HC control demand that unconverted HC be further minimized. Appropriately designed lean NOx catalysts with hydrocarbon adsorber capabilities offer very good HC control with moderate NOx reduction performance when fresh. However, certain zeolite structures appear quite unstable under high temperature aging, yielding significant declines in aged NOx performance. Instabilities can be avoided through proper choice of molecular sieve structure and composition, together with suitable washcoat structure. Durable catalyst performance, exceeding Euro3 standards, will be shown, using a leased Euro:! vehicle.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Improvements in Intimately Coupled Diesel Hydrocarbon Adsorber/Lean NOx Catalysis Leading to Durable Euro 3 Performance


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Fall Fuels and Lubricants Meeting and Exposition ; 1998



    Publication date :

    1998-10-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Hydrocarbon adsorber technology

    Bause,D. / Bilski,G. / Herald,M. et al. | Automotive engineering | 2007


    Hydrocarbon Adsorber Technology

    Bause, D. / Bilski, G. / Herald, M. et al. | British Library Conference Proceedings | 2007


    Hydrocarbon Adsorber Technology

    Bause, Daniel / Bilski, Gary / Herald, Michael et al. | SAE Technical Papers | 2007


    A Durable In-Line Hydrocarbon Adsorber for Reduced Cold Start Exhaust Emissions

    Kirby, Charles W. / Dou, Danan / Balland, Jean et al. | SAE Technical Papers | 1997