Catalytic performance of some non-noble metal based catalytic materials has been investigated for de-NOx reactions, under normal and lean conditions. These catalysts show significant catalytic activity for NOx conversion by hydrocarbon even in presence of oxygen, while the high de-NOx activity with CO was found to be severely affected in oxygen. The surface area of catalysts has been improved following their synthesis on high surface area alumina, using special preparative techniques. These catalysts show excellent thermal stability, while their light-off characteristics have also been remarkably improved by proper application of commonly used high surface area alumina. A small amount of ruthenium metal incorporation has been found very useful with regard to their de-NOx activity and light-off characteristics. Their catalytic activity in presence of oxygen and, at reasonable space velocities, deserve attention for the further investigations on these type of materials, for their possible applications in NOx control under lean-burn conditions. It is realized that perovskite type and other non-noble metal based materials can be suitably designed for de-NOx reactions under lean conditions. Further studies on improvement of catalytic activity, development of modified catalyst compositions, their evaluations with different hydrocarbons as reducing agents are proposed, to investigate their performance and durability for lean burn gasoline vehicle exhaust.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Development of de-NOx Catalyst for the Control of NOx Emissions from Lean-Burn Gasoline Engines


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SIAT 2001 ; 2001



    Publication date :

    2001-01-10




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Catalyst for lean burn engines

    Wilkins,A.J. / Harrison,B. / Johnson Matthey Research Centre,GB | Automotive engineering | 1985


    Future aftertreatment strategies for gasoline lean burn engines

    Burk,P. / Punke,A. / Dahle,U. et al. | Automotive engineering | 1997


    Future Aftertreatment Strategies for Gasoline Lean Burn Engines

    Burk, P. / Punke, A. / Dahle, U. | British Library Conference Proceedings | 1997


    Fuel Assisted Idle Speed Control for Lean Burn Gasoline Engines

    Surnilla, Gopichandra / Kerns, James | SAE Technical Papers | 2006