Effect of gas composition for NO<sub>x</sub> removal using pulsed power

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  • パルスパワーを用いたNO<sub>x</sub>処理におけるガス組成の影響

Abstract

Non-thermal plasma produced by pulsed power discharge in atmospheric pressure gases has been used for high-efficiency treatment of exhaust gases. This paper describes the chemical reactions taking place in the discharges under different gas compositions. A 3-staged Blumlein line generator providing 44kV voltage pulse of 100ns duration was applied to the discharge reactors. A coaxial electrode system, 1-m in length with 83-mm outer and 1-mm inner electrode diameters, was used as a reactor. It was experimentally found that NOx removal ratio becomes lower when NOx gas includes either O2 or H2O, but NOx removal ratio becomes higher when the gas includes both O2 and H2O. Therefore, adding both O2 and H2O species into exhaust gases is preferable.

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