Nitrogen oxides were treated by a positive streamer corona in both, multi-w
ire-to-plane and wire-to-plane discharge reactors. Tn the former reactor, t
he target was to establish a uniform streamer corona. It was successfully g
enerated using a DC power supply and NO/N-2 500-ppm initial gas, when a ser
ies gap was set into the circuit, which enhanced the treatment up to 7.5 g
NO/kW h. In the wire-plane discharge reactor, the effect of grounded electr
ode material on deNO(x) efficiency was investigated. A uniform positive str
eamer corona was generated regardless of the grounded electrode material ev
en without the use of series gap because a single wire was employed for the
high-voltage electrode. The treatment efficiency was enhanced when the gro
unded copper electrode replaced the stainless-steel electrode, and oxygen a
nd water vapors were injected into the reactor (deNO(x) = 30% in Cu-plate r
eactor, deNO(x) = 16% in Sus-plate reactor). (C) 2000 Elsevier Science Ltd.
All rights reserved.