DEVELOPMENT OF GAS PURIFICATION TECHNOLOGY USING CORONA DISCHARGE REACTOR WITH FALLING LIQUID FILM

点击翻译按钮获取中文摘要

1.Construction of Corona Discharge Reactor with Falling Liquid FilmLow-energy electrons generated in a corona discharge reactor are captured by electronegative impurities, and negative ions are produced. The ions drift to the anode in the electric field. A reactor was constructed to remove the negative ions at the anode. In this reactor, the anode is wetted with the liquid absorbent falling along it, and the negative ions are absorbed into the liquid film. Electronegative impurities become negative ions by electron attachment, and the ions drift to the liquid film. The corona discharge induces the ion wind and makes the boundary layr on the falling liquid film thin. The negative ion absorption into the falling film is promoted by the corona discharge.2.Removal of IodineIodine was removed from nitrogen using the corona discharge reactor with a falling liquid film of distillled water. The experimental results suggested that the removal efficiency of iodine was increased by the discharge. The chemical species of iodine in water were experimentally identified. The results suggested that I- produced by electron attachment was absorbed into the falling liquid.Removal of Methyl IodineMethyl iodine was removed from nitrogen using the present reactor. It was found that the reactor was greatly effective to remove methyl iodine. Since I- was produced form methyl iodine by electron attachment, the removal efficiency was increased by the discharge. The authors have proposed the gas purification method using the deposition-type reactor, in which negative ions deposit at the surface of solid anode. It was found that the resent reactor was more effective to remove methyl iodine than the deposition-type reactor. However, the stripping of methyl iodine from the falling film limited the removal efficiency. Hence, the complete conversion of methyl iodine to I will be needed in the future.