Most automobile manufacturers are looking for methods to increase fuel economy. It is possible to achieve this by operating under lean conditions. The problem remains, however, that while hydrocarbon and carbon monoxide oxidation is very efficient on a 3-way catalyst in an oxidising atmosphere, reduction of oxides of nitrogen (NOx) is poor. One method to improve the efficiency for NOx reduction under lean conditions is to use a 3-way catalyst in conjunction with a NOx trap. The NOx trap stores NOx under lean conditions which is then released and reduced under rich conditions.Bench evaluations using a lean tune engine have been carried out on a number of 3-way catalysts containing a range of different NOx adsorbent components. Measurements of adsorption capacity, temperature window for lean NOx conversion and thermal durability have been made and a comparison of different adsorption materials determined. The effect of Pt loading on these parameters has also been ascertained. A lean NOx efficiency of close to 100 % has been observed over a wide temperature range. The effect of addition of a close coupled catalyst upstream of the NOx trap is also discussed.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Evaluation of NOx Adsorber Catalysts Systems to Reduce Emissions of Lean Running Gasoline Engines


    Additional title:

    Sae Technical Papers


    Contributors:
    Clark, A.D. (author) / Moore, J.S. (author) / Brogan, M.S. (author) / Brisley, R.J. (author)

    Conference:

    1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1996



    Publication date :

    1996-10-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Evaluation of NOx Adsorber Catalysts Systems to Reduce Emissions of Lean Running Gasoline Engines

    Brogan, M. S. / Brisley, R. J. / Moore, J. S. et al. | British Library Conference Proceedings | 1996


    Evaluation of NOx adsorber catalysts systems to reduce emissions of lean running gasoline engines

    Brogan,M.S. / Brisley,R.J. / Moore,J.S. et al. | Automotive engineering | 1996


    Comparison of De-NOx and Adsorber Catalysts to Reduce NOx - Emissions of Lean Burn Gasoline Engines

    Wilkins, A.J.J. / L#tkemeyer, G. / Lepperhoff, G. et al. | SAE Technical Papers | 1996


    Comparison of De-NO~x and Adsorber Catalysts to Reduce NO~x Emissions of Lean Burn Gasoline Engines

    Luetkemeyer, G. / Weinowski, R. / Lepperhoff, G. et al. | British Library Conference Proceedings | 1996


    Comparison of De-NOx and adsorber catalysts to reduce NOx-emissions of lean burn gasoline engine

    Luetkemeyer,G. / Weinowski,R. / Lepperhoff,G. et al. | Automotive engineering | 1996