This paper describes the development of a novel low precious metal nano-technology catalyst (Nanocat) and its application in a modern European gasoline vehicle.Three iterations of low precious metal nano-technology catalysts were tested on a Euro 3 certified gasoline vehicle over the European drive cycle (EDC). Engine dynamometer lean spike ageing was used to simulate aged catalysts representing approximately 100 000 km on-road ageing. The fresh and aged nano-technology catalysts were tested and compared to the vehicle production catalyst.The third iteration of fresh nano-technology catalyst met Euro 3 emissions legislation and also met Euro 4 limits for HC and NOx. However, after lean spike ageing the NOx levels exceeded Euro 3 limits but the HC tailpipe remained within Euro 4 limits. The ageing process caused an 18% reduction in the NOx conversion but the HC conversion was maintained.During the vehicle testing non regulated emissions were measured using online Fourier Transform Infra-Red spectroscopy (FTIR). NH3 emissions were measured pre and post catalyst and it is postulated the production of NH3 over the nano-technology catalyst assisted in the NOx conversion.


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    Title :

    The Challenges of Meeting Future Emissions Legislation with a Novel Low Precious Metal TWC


    Additional title:

    Sae Technical Papers


    Contributors:
    Thomson, J. (author) / Keenan, M. (author)

    Conference:

    2004 Powertrain & Fluid Systems Conference & Exhibition ; 2004



    Publication date :

    2004-10-25




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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