Flue Gas Cleaning Using a Wet-type Plasma Reactor

Within the last 10 years, various kinds of corona-induced non-thermal plasmas have been investigated in order to remove gaseous pollutants, such as SO₂ and NO, from air and exhaust gases. Normally, the gas treatment is carried out at or above room temperature by the conventional dry-type corona reactor. However, this treatment is still inadequate for the removal of certain stable gases present in the flue gas mixture. In this work, a wet-type corona reactor (needle-water electrode) is presented that can simultaneously remove NO and SO₂ from flue gas at low temperatures and at atmospheric pressure. The effect of water vapor and oxygen concentration on the plasma remediation of SO₂ and NO using wet-type plasma reactor were studied. The experimental results show both removal rate of NO and SO ₂ are improved in wet-type reactor than that of dry-type reactor. The SO₂ and NO conversion increased with increasing water vapor and oxygen content in the flue gas