Abstract
Nitrogen oxides were irradiated by electron beams at low concentrations ranging from 50–1000 ppm in nitrogen and the mixture of nitrogen and oxygen at 100°C. In nitrogen, the NO was decomposed to mainly nitrogen and oxygen with the G-value of 1.7. In the presence of oxygen, effects of initial concentrations of NO, NO 2 and oxygen on the changes of NO and NO 2 concentration were studied. Oxidation of NO and reduction of NO 2 take place simultaneously and an empirical equation, (NO)/(NO) 2) 2 = 0.027 ppm -1, was found at 3% oxygen under irradiation above 4 Mrad when the NO 2 concentration is higher than 60 ppm. These reactions are considered to proceed by oxygen atom produced by the irradiation of the mixture of nitrogen and oxygen.
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