:—The behaviors of NO and NH3 in NO-NH3-N2 mixture under the UV irradiation—

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The behaviors of N2O, NO and NH3 in N2O-NH3-N2 and NO-NH3-N2 mixture under the UV irradiation were studied at room temprature. The decomposition rate of NH3 in NH3-N2 mixture under the UV irradiation was proportional to the concentration of NH3, and the rate under a low pressure mercury lamp irradiation was three times larger than that under a high pressure mercury lamp irradiation. No effect of NH3 and N2O was observed on the decomposition rate of N2O and NH3 under the irradiation with a low pressure mercury lamp. While N2O did not change and NH3 decomposed slowly by the irradiation with a high pressure mercury lamp, and the rate was not affected by N2O. NO and NH3 in NO-NH3-N2 mixture decomposed rapidly with the formation of small amount of N2O as a by-product under a low pressure mercury lamp irradiation. The amount of NO decomposed was nearly equal to that of NH3, the rate of decomposition of NH3 increased with the increase of the concentration of NO, and was expressed by the following equation: d [NH3] /dθ=k1 [NH3] +k2 [NH3] [NO] 1/2 [θ; W/F (watt⋅min⋅l-1) ] The decomposition rate of NO in NO-NH3-N2 mixture under a low pressure mercury lamp irradiation was nearly equal to the decomposition rate of NH3, and was ten times larger than that under a high pressure mercury lamp irradiation. The yield of N2O (less than 10% of the amount of NO decomposed) increased proportionally to the amount of NH3 decomposed and the concentration of NO.
環境技術学会の論文

:—The behaviors of NO and NH<SUB>3</SUB> in NO-NH<SUB>3</SUB>-N<SUB>2</SUB> mixture under the UV irradiation—

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