Tests are carried out to assess the potential of using SCR DeNOx catalysis, for achieving ultra-low NOx emission levels with heavy-duty diesel engines. A prototype DeNOx catalyst system has been developed which consists of a moderately sized SCR catalyst, upstream of which urea is injected through a heat-shielded nozzle. Downstream of the SCR catalyst a low sulphate oxidation catalyst is used to ensure any ammonia slippage from the SCR stage is oxidized.The system was tested on a standard 2-valve EURO 2 engine over several steady-state and transient test cycles currently under discussion for European use. Over these test cycles NOx emission values of about 2 to 2.5 g/kWh are accomplished, which are sufficient to fulfill future European heavy-duty NOx emissions legislation to be expected around the year 2005.


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    Titel :

    Development of a Urea DeNOx Catalyst Concept for European Ultra-Low Emission Heavy-Duty Diesel Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Truck & Bus Meeting & Exposition ; 1995



    Erscheinungsdatum :

    01.11.1995




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Development of a Urea DeNOx Catalyst Concept for European Ultra-Low Emission Heavy-Duty Diesel Engines

    Havenith, C. / Verbeek, R. P. / Heaton, D. M. et al. | British Library Conference Proceedings | 1995


    Transient Performance of a Urea deNOx Catalyst for Low Emissions Heavy-Duty Diesel Engines

    Havenith, Cornelis / Verbeek, Ruud P. | SAE Technical Papers | 1997


    Transient Performance of a Urea deNOx Catalyst for Low Emissions Heavy-Duty Diesel Engines

    Havenith, C. / Verbeek, R. P. / SAE | British Library Conference Proceedings | 1997


    Transient performance of a urea deNOx catalyst system for low emissions heavy-duty diesel engines

    Havenith,C. / Verbeek,R.P. / The Netherlands Ministry of Environment,VROM,NL et al. | Kraftfahrwesen | 1997


    Optimization of urea SCR deNOx systems for HD diesel engines

    van Helden,R. / Verbeek,R. / Willems,F. et al. | Kraftfahrwesen | 2004