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首页> 外文会议>IEEE International Conference on Plasma Science >The Kinetic Mechanisms of Diffuse Nanosecond Pulsed Discharge in the Degradation of Hcho
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The Kinetic Mechanisms of Diffuse Nanosecond Pulsed Discharge in the Degradation of Hcho

机译：扩散纳秒脉冲放电在Hcho降解中的动力学机理

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Summary form only given. It has been proposed that nanosecond pulsed discharge (NPD) has unique advantages in the degradation of volatile organic compounds (VOCs) with optimized ionization efficiency and prevented thermal instability1, 2. Since the complex kinetics processes of physicochemical and chemical reactions in the plasma system, the kinetics mechanisms for VOCs degradation and the control of by-production are still uncertain. In this work, a diffuse nanosecond pulsed dielectric barrier discharge plasma source is developed for the degradation of HCHO using needles array to plate electrode configuration. The fast exposure images, the time evolution for electrical behavior, and the temporal resolved spectra are used to study the instantaneous characteristics of the discharge and understand the mechanisms of plasma processes. On the assist of instantaneous characteristics, the kinetic mechanisms of physiochemical processes for active species conversion and HCHO degradation are described. It is shown that the metastable nitrogen molecules play the important role in the generation of high energy level state excited particles of N2 (C3Πu, C5Πu) in the generation of active species of O, H and OH, and in the degradation of HCHO. The oxygen mole fraction has the obvious influences on variety and number density of active species. Corresponding for the mechanisms of HCHO degradation, the radicals OH and H are the dominate particles at low oxygen mole fraction (收起
机译：仅提供摘要表格。有人提出，纳秒脉冲放电（NPD）在降解挥发性有机化合物（VOC）方面具有独特的优势，并具有最佳的电离效率并防止了热不稳定性1、2。由于等离子体系统中物理化学反应的复杂动力学过程， VOCs降解的动力学机制以及副产物的控制仍不确定。在这项工作中，开发了一种扩散的纳秒脉冲介电势垒放电等离子体源，用于使用针阵列到板电极配置来降解HCHO。快速曝光图像，电行为的时间演化和时间分辨光谱用于研究放电的瞬时特性并了解等离子体过程的机理。在瞬时特性的辅助下，描述了用于活性物种转化和HCHO降解的物理化学过程的动力学机理。结果表明，亚稳氮分子在O，H和OH活性物种的产生以及HCHO的降解中，在N2的高能级态激发N2（C3Πu，C5Πu）粒子的产生中起着重要作用。氧摩尔分数对活性物质的种类和数量密度有明显的影响。对应于HCHO的降解机理，自由基OH和H是低氧摩尔分数下的主要颗粒（收起

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