Application of pulsed corona discharge to diesel exhaust remediation

Author

Puchkarev, V. ; Kharlov, A. ; Gundersen, M. ; Roth, G.

Author_Institution

Dept. of Electr. Eng. Univ. of Southern California, Los Angeles, CA, USA

Volume

1

fYear

1999

Firstpage

511

Abstract

This paper reports on the efficient treatment of diesel emission with a transient, nonequilibrium plasma created by a pulsed corona discharge. The transient plasma (/spl sim/50 ns) is found to reduce NO/sub x/ emission in a flow of 1-10 liters/second with energy cost /spl les/10-20 eV/molecule, corresponding to a fraction of source power /spl sim/5%. The efficiency of NO/sub x/ reduction is a complex function of parameters that include pulse width, pulse polarity, current density, repetition rate, and reactor design. Laser induced fluorescence was utilized to study the temporal behavior of NO depletion in a single streamer and axial flow. NO is found to deplete within a few milliseconds following pulse excitation.

Keywords

air pollution control; corona; internal combustion engines; nitrogen compounds; plasma materials processing; pulse generators; pulsed power technology; 50 ns; Laser induced fluorescence; NO; NO depletion; NO/sub x/ emissions reduction; axial flow; current density; diesel emissions treatment; diesel exhaust remediation; pulse excitation; pulse polarity; pulse width; pulsed corona discharge application; reactor design; repetition rate; single streamer; temporal behavior; transient nonequilibrium plasma; Corona; Costs; Current density; Fault location; Fluorescence; Inductors; Laser excitation; Plasma applications; Plasma sources; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Pulsed Power Conference, 1999. Digest of Technical Papers. 12th IEEE International

Conference_Location

Monterey, CA, USA

Print_ISBN

0-7803-5498-2

Type

conf

DOI

10.1109/PPC.1999.825522

Filename

825522