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TOLUENE OXIDATION IN A PULSED DIELECTRIC BARRIER DISCHARGE

M. Magureanu1,* , N. B. Mandache1, V. I. Pârvulescu2

Affiliation

  1. National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Str., P.O.Box MG-36, 77125 Bucharest-Magurele, Romania
  2. University of Bucharest, Dept. of Chemical Technology and Catalysis, Bd. Regina Elisabeta 4-12, Bucharest 030016, Romania

Abstract

A dielectric barrier discharge in coaxial geometry, operated in pulsed mode, was investigated with the aim of total oxidation of volatile organic compounds, in particular toluene. For voltage pulses with amplitudes in the range 23-35 kV and 100 ns duration, the values of the peak discharge current were 90-157 A. The energy per pulse is higher at lower pulse frequency (92 mJ at 96 Hz) and decreases when the frequency is increased (20 mJ at 250 Hz). A less pronounced decrease is observed for the average power, which varies between 9 and 5 W in this frequency range. Toluene oxidation was investigated under the following experimental conditions: voltage pulses amplitude 29 kV, discharge current 109 A, energy per pulse 59 mJ and average power 7 W. Toluene conversions of 60-70% were obtained, roughly independent on flow rate and toluene input concentration. The total oxidation of toluene to carbon dioxide and water is enhanced at low flow rate, or high input energy, and low toluene concentration..

Keywords

Pulsed dielectric barrier discharge, Volatile organic compounds, Toluene oxidation.

Submitted at: Jan. 12, 2005
Accepted at: May 26, 2005

Citation

M. Magureanu, N. B. Mandache, V. I. Pârvulescu, TOLUENE OXIDATION IN A PULSED DIELECTRIC BARRIER DISCHARGE, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 3, pp. 1623-1627 (2005)