Two dielectric materials (barium titanate and glass pellets) were evaluated for their ability to decompose/oxidize nitric oxide (NO) by nonthermal plasma discharge. Both barium titanate and glass pellets were tested in a packed bed dielectric barrier plasma reactor. The plasma reactor using barium, titanate completely destroys 130 ppm of NO in nit airstream at an electric field strength of 9 kV/cm. A majority of the incoming NO is decomposed to N-2 and O-2. However, 30 of the NO is oxidized to NO2. The plasma reactor using glass pellets in a similar system is just as effective, but at a 3 k V/cm higher electric field strength. The 40 ppm NO2 in the effluent of the plasma reactor is then removed quantitatively by a caustic sodium sulfite aqueous scrubbing system. The outlet concentrations of both NO and NO2, from the plasma-scrubber combination system (corona-induced chemical scrubber) are beyond the detection limit of the chemiluminescent NOx analyzer. References: 14
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