A new type of corona discharge reactor for simultaneous removal of NO and SO2 from flue gas

An experimental study on the simultaneous removal of NO and SO₂ in a simulated flue gas has been carried out using multipoint to water corona discharge reactor. In a simulate flue gas containing of 400 ppm NO and 400 ppm SO₂, the NO and SO₂ can be simultaneous removal. The gas phase NO is oxidized by corona discharge and converted into HNO₃ and HNO₃ dissolve velocity constant is very high, so that it is possible to remove by liquid phase absorption. The absorption into the water of gas phase SO₂ and liquid phase oxidation of HSO₃^- [S (IV)] to SO₄^2- [S (VI)] is promoted by corona discharge. Most of the SO₂ removal is attributed to the liquid phase absorption and NO conversion via gas phase oxide. In a word, the corona discharge increases the mass transfer and oxidation.