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The effect of O 2 and H 2 O vapor on the Nitric oxide (NO) removal rate, the NO 2 generation rate and the discharge characteristics were investigated using the dielectric barrier discharge (DBD) reactor at 1 atm pressure and at room temperature (20°). The results showed that the O 2 present in the flue gas always hampered the removal of NO and the generation of N 2 O, but that the O 2 could enhance the generation of NO 2 in the NO/N 2 / O 2 mixtures. Furthermore, with the increase of oxygen, the average discharge current gradually decreases in the reactor. The H 2 O present in N 2 /NO hindered the removal of NO and the generation of NO 2 but had no impact on the average discharge current in the reactor in the NO/N 2 /H 2 O mixtures in which the HNO 2 and HNO 3 was detected. The energy efficiency of the DBD used to remove the NO from the flue gas was also estimated.

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