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

1.落液膜电晕放电反应器的构建电晕放电反应器中产生的低能电子被电负性杂质捕获，产生负离子。离子在电场中漂移到阳极上。建造了一个反应器来去除阳极处的负离子。在该反应器中，当液体吸收剂沿其落下时，使阳极润湿，负离子被吸收到液膜中。电负性杂质通过电子附着变成负离子，离子漂移到液膜上。电晕放电诱导离子风，使下降液膜上的边界层变薄。电晕放电促进负离子吸收到降膜中。2.利用蒸馏水降膜电晕放电反应器去除氮气中的碘。实验结果表明，放电提高了对碘的去除效率。对水中碘的化学形态进行了实验鉴定。结果表明，电子吸附产生的I-被吸收到降液中，利用该反应器可从氮气中脱除甲基碘。结果表明，该反应器对甲基碘有很好的去除效果。由于I-是由甲基碘通过电子附着产生的，所以放电提高了去除效率。提出了沉积式反应器的气体净化方法，即在固体阳极表面沉积负离子。结果表明，REST反应器比沉淀式反应器对甲基碘的去除效果更好。然而，降膜中甲基碘的剥离限制了去除效率。因此，未来需要将甲基碘完全转化为碘。

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.