Radiation treatment of exhaust gases. IV. Oxidation of NO in the moist mixture of O 2 and N 2

Abstract

A NO-H 2O-O 2-N 2 gaseous mixture was irradiated by electron beams of 1.5 MeV at various reaction conditions. The decrease in [NO] was much larger for the moist mixture than for the dry mixture. The NO was easily oxidized to NO 2 and finally to HNO 3 in the moist mixture. The rate of NO consumption in the mixture increased with increasing H 2O- and O 2-concentrations and with lowering irradiation temperature from 150 to 100°C. The G(-NO) obtained in lower dose was 7.5 in the moist mixture of NO(100–500 ppm), H 2O(8.4%), O 2(11.4%) and N 2(80.2%) at 120°C. The formed HNO 3 reacted with NO to form NO 2.