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DEPOLLUTION EXPERIMENTS WITH REPETITIVE PULSED CORONA PLASMAS

N. Georgescu1,* , R. Minea1, C. P. Lungu1

Affiliation

  1. National Institute for Lasers, Plasma and Radiation Physics, Magurele-Bucharest, Romania

Abstract

Nitrogen oxide (NO) and sulfur dioxide (SO2) are some of the most difficult air pollutants to remove chemically. However, it has been shown to decompose them by electrical discharges. In this work, the effect of reactor geometries (point-plate, wire-plate, wire cylinder) on NO and SO2 decomposition in pulsed corona plasmas is examined. The wire cylinder geometry is the optimum one. A simulated polluted air was treated with pulsed corona plasmas in a wire-cylinder reactor. By using ethanol as additive, and -alumina as catalyst, an energy efficiency of 18.7 eV / (NOX molecule), for 82 % reduction ratio, was obtained. The main electronically-chemical reactions implied in the pollutants destruction are then discussed..

Keywords

Gases pollution control, Corona plasmas, Repetitive high-voltage pulses.

Submitted at: Feb. 25, 2005
Accepted at: Sept. 22, 2005

Citation

N. Georgescu, R. Minea, C. P. Lungu, DEPOLLUTION EXPERIMENTS WITH REPETITIVE PULSED CORONA PLASMAS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 5, pp. 2501-2506 (2005)