Optical Emission Spectroscopic Measurement of Hydroxyl Radicals in Air Discharge with Atomized Water

• 作者: 孙明 张颖 陈维刚
• 来源期刊: 等离子体科学和技术：英文版
• 学科: 化学
• 关键词: 羟自由基 放电模式 空气放电 雾化水 光谱测量 光发射 喷嘴电极 电晕放电
• 年，卷（期）: 2011,（4）
• 页码范围: 470-473
• 页数: 4页
• 分类号: O621.146|TM912
• 语种: 英文

摘要

Effects of discharge mode, voltage applied, size of the nozzle discharge electrode and flow rate of water on the generation of hydroxyl radical were investigated in air discharge with atomized water, by using optical emission spectroscopy （OES）. Water was injected into the discharge region through the discharge nozzle electrode, and a large amount of fine water drops, formed and distributed in the discharge region, corona discharge was more effective to generate were observed. It was found that negative DC the hydroxyl radicals in comparison to positive DC corona discharge or negative pulsed discharge. A larger outer diameter of the nozzle electrode or a stronger electric field is beneficial for hydroxyl-radical generation. Moreover, there is a critical value in the flow rate of atomized water against the discharge voltage. Below this critical value, hydroxyl-radical generation increases with the increase in flow rate of the water, while above this value, it decreases. In addition, it is observed that OES from the discharge is mainly in the ultraviolet domain. The results are helpful in the study of the mechanism and application of plasma in pollution-control in either air or water.