Removal of NO Molecules by a Novel Atmospheric Pressure Plasma Apparatus

A novel atmospheric pressure plasma apparatus (APPA) is designed with a liquid electrode, and its discharging characteristics are studied. Relatively uniform and intense discharge can be realized in the APPA system. An experimental study on removal of NO molecules is carried out by using the APPA, and more than 95.5% of NO is decomposed when the NO initial concentration is lower than 400ppm. Removal of NO efficiency increases rapidly with the increasing discharge power. Compared with the absence of O₂, more NO₂ is generated with the increase of O₂ concentration. However, most of the NO molecules are decomposed to N₂ and O₂ directly, when O₂ concentration changes from 0 to 1.1vol%.