NOx Diesel Exhaust Gas Treatment Using a Pulsed Corona Discharge: the Pulse Repetition Rate Effect

Y. Yankelevich, M. Wolf, R. Baksht, A. Pokryvailo, J. Vinogradov, B. Rivin, E. Sher

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Abstract

The pulsed corona offers real promise for degradation of pollutants in gas and water streams. This paper presents a study of NOx removal from diesel exhaust. Special emphasis is laid on the investigation of the dependence of the NO removal rate and efficiency on the pulse repetition rate (PRR). A nanosecond solid state power supply (45 kV, 60 ns, up to 1 kHz) was used for driving the corona reactor. A Mitsubishi 10 kW 3-cylinder diesel-generator engine with a total volume of 1300 cm3 was used as a source of exhaust gas. At an NO removal rate of 35% the NO removal efficiency was 53 g kW−1h−1 for PRR = 500 Hz and the initial NO concentration was 375 ppm. A semi-empirical expression for the corona reactor removal efficiency related both to PRR and to the residence time is presented. The removal efficiency decreases with increasing PRR at constant flow rate or constant residence time. This expression demonstrates reasonable agreement between the calculation results and the experimental data.
Original languageEnglish
Pages (from-to)386-391
Number of pages6
JournalPlasma Sources Science and Technology
Volume16
Issue number2
DOIs
Publication statusPublished - 17 Apr 2007

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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