Presence of soot in gas analysis systems is believed to cause errors in measurement of the concentration of oxides of nitrogen (NOx) because of adsorption of NOx by soot. The work reported herein involves a preliminary experimental and theoretical analysis to determine the extent of the errors caused by the interaction of NOx with soot suspended in diesel exhaust measurement systems. The experimental results, which are in qualitative agreement with the theory, suggest that at room temperature the percentage of NOx adsorbed by soot suspended in the exhaust Stream is a function of the residence time of the gas sample in the sample line. Therefore, a short sample line and a high flow rate would minimize the error in the measurement of NOx. Application of the model to a production passenger-car diesel engine tested on the Federal Test Procedure and using the standard Constant Volume Sampling system indicates that the error in NOx measurement attributable to adsorption by soot is negligible.


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    Titel :

    Effect of Particulates on the Measurement of Oxides of Nitrogen in Diesel Exhaust


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Ahmad, Tanvir (Autor:in)

    Kongress:

    1980 Automotive Engineering Congress and Exposition ; 1980



    Erscheinungsdatum :

    1980-02-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Effect of particulates on the measurement of oxides of nitrogen in Diesel exhaust

    Ahmad,T. / General Motors,Res.Lab.,US | Kraftfahrwesen | 1980




    Analysis of Diesel Exhaust Particulates

    Hall, D. / Co-ordinating European Council for the Developement of Performance Tests for Transport Fuels, Lubricants and other Fluids | British Library Conference Proceedings | 1993