基于直流电晕放电和催化剂反电晕的等离子体发生法

发布时间：2018-05-23 14:37

本文选题：电晕放电 + 反电晕　；参考：《高电压技术》2017年06期

【摘要】：为实现等离子体和催化材料的紧密结合,构建了电晕放电极、辅助电极、催化材料和接地极组成的反电晕放电体系。采用伏安特性、图像分析、发射光谱和粒子成像测速技术研究反电晕放电过程和等离子体特性。结果表明:基于直流电晕放电,在颗粒层或蜂窝表面和孔道中发生二次放电,产生了反电晕等离子体;发生反电晕时,电流显著增大,在相同电压条件下,反电晕电流是典型的电晕放电电流的2倍以上;反电晕放电区域主要是N2的第二正系激发态物质,波长为337.13 nm和357.69 nm的发射光谱强度较大;反电晕改变了放电区域的流场,产生的离子风速度超过1.0 m/s;辅助网电极限制了蜂窝表面和孔道的流光向火花放电发展,实现稳定的反电晕放电。
[Abstract]:A reverse corona discharge system composed of corona discharge electrode, auxiliary electrode, catalytic material and ground electrode was constructed to realize the close combination of plasma and catalytic material. Voltammetry, image analysis, emission spectroscopy and particle imaging velocimetry were used to study the reverse corona discharge process and plasma characteristics. The results show that, based on DC corona discharge, secondary discharge occurs in the granular layer or honeycomb surface and pore, and the reverse corona plasma is produced, and the current increases significantly at the same voltage. The anticorona current is more than twice that of the typical corona discharge current, the anticorona discharge region is mainly the second positive excited state of N2, and the emission spectra at wavelength of 337.13 nm and 357.69 nm are larger, and the reverse corona changes the flow field in the discharge region. The ion wind velocity is more than 1.0 m / s, and the auxiliary grid electrode restricts the development of streamer on the honeycomb surface and pore to spark discharge, and realizes stable reverse corona discharge.
【作者单位】：嘉应学院化学与环境学院;浙江大学化学工程与生物工程学院;
【基金】：国家自然科学基金(21276232;21507043) 广东省自然科学基金(2014A030310196;2016A030307009)~~
【分类号】：O53

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