The selective catalytic reduction of NO using urea (urea-SCR) is one of the promising technologies for removing NOx from diesel engine exhaust. The engine-out NOx is reduced by ammonia (NH3) derived from urea over a catalyst to environmentally benign N2. In this paper, we investigate the effect of various reactor operating conditions on the NOx reduction performance of three different catalyst formulations (e.g., Cu-zeolite, Fe-zeolite, Vanadium-based) to obtain useful guidance in the design and operation of urea-SCR lean NOx emission control systems. We examine the effects of NO:NO2 ratio on the steady-state NOx reduction activity at typical diesel engine exhaust temperatures (150-550°C). Transient measurements were also performed to determine the impact of NH3:NOx ratio and NH3 storage on catalyst performance. The impacts of hydrocarbon poisoning and sulfur poisoning/regeneration were also examined.


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    Title :

    Evaluation of Supplier Catalyst Formulations for the Selective Catalytic Reduction of NOx With Ammonia


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Powertrain & Fluid Systems Conference & Exhibition ; 2005



    Publication date :

    2005-10-24




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Evaluation of supplier catalyst formulations for the selective catalytic reduction of NOx with ammonia

    Schmieg,S.J. / Lee,J.H. / General Motors Res.and Dev.Center,US | Automotive engineering | 2005



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    Hsieh,M.F. / Wang,J. / Ohio State Univ.,Columbus,US | Automotive engineering | 2010