In view of the application of gas cleaning technology by electrical di
scharge, the authors investigated the effect of characteristics of pul
se corona on the gas decomposition. It was shown that pulse rise time,
pulse peak voltage and pulse frequency greatly influence the decompos
ition of the gases. Pulse rise times less than about 100 nano sec, pul
se peak voltages more than about 25 kV and pulse frequencies more than
60 pulse/sec are required for effective gas decompositions (nearly 10
0 % decomposition). Gas residence time more than about 2 min (now rate
less than about 0.4 cm/sec) is also necessary for effective decomposi
tion of the gases.