Title :
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
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;
Conference_Titel :
Pulsed Power Conference, 1999. Digest of Technical Papers. 12th IEEE International
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-5498-2
DOI :
10.1109/PPC.1999.825522
