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    Investigations into NOx Aftertreatment with Urea SCR for Light-Duty Diesel Vehicles

    Investigations into NOx Aftertreatment with Urea SCR for Light-Duty Diesel Vehicles


    Future US emissions limits are likely to mean a sophisticated nitrogen oxide (NOx) reduction technique is required for all vehicles with a diesel engine, which is likely to be either NOx trap or selective catalytic reduction (SCR) technology. To investigate the potential of SCR for NOx reduction on a light duty vehicle, a current model vehicle (EUII M1 calibration), of inertia weight 1810 kg, was equipped with an urea-based SCR injection system and non-vanadium, non-zeolitic SCR catalysts. To deal with carbon monoxide (CO), hydrocarbon (HC) and volatile organic fraction (VOF), a diesel oxidation catalyst was also incorporated into the system for most tests. Investigations into the effect of placing the oxidation catalyst at different positions in the system, changing the volume of the SCR catalysts, increasing system temperature through road load changes, varying the SCR catalyst composition, and changing the urea injection calibration are discussed. A NOx conversion of 73% over the FTP cycle (0.260 g/mile tailpipe) was achieved with the best system.

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    Title :

    Investigations into NOx Aftertreatment with Urea SCR for Light-Duty Diesel Vehicles

    Additional title:

    Sae Technical Papers

    Contributors:
    Wilkins, A. J. J. (author) / John, G. A. (author) / Chandler, G. R. (author) / Blakeman, P. G. (author)
    Conference:

    Spring Fuels & Lubricants Meeting & Exhibition ; 2002

    Published in:

    Sae Technical Paper Series

    Publication date :

    2001-09-24

    ISSN :

    2688-3627 , 0148-7191

    DOI :

    https://doi.org/10.4271/2001-01-3624

    Type of media :

    Conference paper

    Type of material :

    Print

    Language :

    English

    Keywords :

    Selective catalytic reduction , Carbon monoxide , Nitrogen oxides , Hydrocarbons , Catalysts

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