This letter reports efficient treatment of NO emission with a transient, nonequilibrium plasma created by pulsed corona discharge. The transient plasma (≈50 ns) is found to reduce NO emission by 50% in a flow of 2–25 l/s with energy cost ≈10–20 eV/molecule, corresponding to a fraction of source power of ≈5%. The efficiency of NOx reduction is a complex function of parameters that include pulse width, pulse polarity, current density, repetition rate, and reactor design. It was found that the best efficiencies are correlated with a low current density (0.2 A/cm2)and high repetition rate (1 kHz) under high flow rate. Careful optimization of all these parameters is required to reach cost effective NOx reduction.

1.
A collection of articles on various plasma technologies and on efficiency of different methods for plasma remediation of toxic gases appears in Non-Thermal Plasma Techniques for Pollution Control, parts A and B, edited by B. M. Penetrante and S. E. Schultheis (Springer, New York, 1993).
See also Y. L. M. Creyghton, Ph.D. thesis, Eindhoven (1994).
2.
Experiments with 300 kW engine and emission analysis were performed under the direction of D. Walker at the Diesel Technology Laboratory, Golden West College, Huntington Beach, CA.
3.
M. Gundersen, V. Puchkarev, and I. Yampolsky, US Patent No. 5 603-893 (1997).
4.
A. C.
Gentile
and
M. J.
Kushner
,
J. Appl. Phys.
78
,
2074
(
1995
).
5.
D. L.
Kuznetsov
,
G. A.
Mesyats
, and
Yu. N.
Novoselov
,
Tech. Phys. Lett.
20
,
269
(
1994
).
6.
B. V. Potapkin, M. A. Deminskii, A. A. Fridman, and V. D. Rusanov, in Non-Thermal Plasma Techniques for Pollution Control, part A, edited by B. M. Penetrante and S. E. Schultheis (Springer, New York, 1993), pp. 91–106.
7.
M. A. Deminskii, B. V. Potapkin, V. D. Rusanov, and A. A. Fridman, High Energy Chem. 28, 304 (1994).
8.
E. M.
van Veldhuizen
,
W. R.
Rutgers
, and
V. A.
Bityurin
,
Plasma Chem. Plasma Process.
16
,
227
(
1996
).
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