DOI: 10.1140/epjd/e2009-00276-4
DC corona discharge ozone production enhanced by magnetic field
S. PekárekCzech Technical University in Prague, Faculty of Electrical Engineering, Technická 2, 166 27 Prague 6, Czech Republic
pekarek@fel.cvut.cz
Received 7 July 2009 / Received in final form 18 September 2009 / Published online 6 November 2009
Abstract
We have studied the effect of a stationary magnetic field on the production
of ozone from air at atmospheric pressure by a negative corona discharge in
a cylindrical electrode configuration. We used a stainless steel hollow
needle placed at the axis of the cylindrical discharge chamber as a cathode.
The outer wall of the cylinder was used as an anode. The vector of magnetic
induction was perpendicular to the vector of current density.
We found that: (a) the magnetic field extends the current voltage range of
the discharge; (b) for the discharge in the Trichel pulses regime and in the
pulseless glow regime, the magnetic field
has no substantial effect on the discharge voltage or on the concentration
of ozone that is produced; (c) for the discharge in the filamentary streamer
regime for a particular current, the magnetic field increases the discharge
voltage and consequently an approximately 30% higher ozone concentration
can be obtained; (d) the magnetic field does not substantially increase the
maximum ozone production yield. A major advantage of using a magnetic field
is that the increase in ozone concentration produced by the discharge can be
obtained without additional energy requirements.
52.80.Hc - Glow; corona.
52.80.Sm - Magnetoactive discharges.
52.77.-j - Plasma applications.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2009
