Abstract
The dc corona was studied as an alternative for NO oxidation in a two-stage chemical scrubber. The dc corona plasma reactor completely oxidized 150
ppm of NO to NO
2 in an air stream. The NO
2 was further oxidized at a higher voltage. For some cases, the NO
2 in the effluents of the plasma reactor was absorbed quantitatively by a caustic sodium sulfite aqueous solution in a 2
l bubble column gas absorber. The outlet concentrations of both NO and NO
2 from the plasma-scrubber combination system (corona-induced chemical scrubber) were below the detection limit of the chemiluminescent NO
x
analyzer.