大气压马尔特效应增强脉冲放电等离子体物理与化学活性及其脱除挥发性有机废气应用

项目名称： 大气压马尔特效应增强脉冲放电等离子体物理与化学活性及其脱除挥发性有机废气应用

项目编号： No.51477025

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 李杰

作者单位： 大连理工大学

项目金额： 86万元

中文摘要： 针对放电等离子体中高能电子浓度与能量低，导致等离子体应用能量利用效率低的问题，依据场致发射、脉冲功率与等离子体基础与应用的研究成果，提出大气压马尔特效应增强脉冲放电等离子体物理与化学活性及其脱除挥发性有机废气（VOCs）应用研究课题。采用金属氧化物修饰阴极和在阴极施加负直流电压，使氧化物表面积累或极化一定密度的正电荷，增加阴极电场强度，诱发大气压阴极马尔特效应产生，增加阴极释放电子数量，降低气体击穿电压，提高等离子体强度。研究放电流光与阴极负直流电压耦合作用产生大气压马尔特效应的方法，马尔特效应诊断方法，马尔特效应对等离子体宏观特性、微观特性和化学特性的影响，建立马尔特效应作用下脉冲放电等离子体模型，揭示马尔特效应增强脉冲放电等离子体物理与化学活性的机制；考查等离子体脱除VOCs效果和能量利用效率，研究马尔特效应提高脉冲放电等离子体应用性能及其机制。为放电等离子体在相关学科的研究提供参考。

中文关键词： 脉冲放电；马尔特效应；大气压冷等离子体；物理与化学活性；挥发性有机废气

英文摘要： Low density and energy of energized electrons in discharge plasma will lead to the low energy utilization efficiency of plasma.Based on the researches on field emission, pulsed power and plasma fundamental and applications,the research on improving the physical and chemical activities of pulse discharge plasma by atmospheric Malter Effect and its application for removal of volatile organic compounds (VOCs) is proposed. In this work, both modification of cathode with metallic oxide and suppling negative direct current (DC) voltae on the cathode are used to accumulate or generate some positive charges through polarization on the surface of metallic oxide for enhancingthe electric field strength of cathode. The strong electric field of cathod induces the generation of atmospheric Malter Effect for improving the release of seed electrons from cathode,decreasing the breakdown voltage of gas and enhance the plasma generation. The generation method of Malter Effect under atmospheric pressure by coupling pulse discharge streamer with negative DC voltage on the cathode is studied, and the diagnostic method of Malter Effect and its influences on the macro /microcosmic characteristics of plasma, and the chemical properties of plasma are also investigated. A model of pulse discharge plasma is established to reveal the promoting mechanism of the physical and chemical activities of pulse discharge plasma by Malter Effect. The VOCs removal efficiency and energy efficiency are examined, and the performance enhancement and mechanisms of Malter Effect on pulse discharge plasma is clarified. This project is expected to provide reference for the scientific researches in the disciplines related to discharge plasma.

英文关键词： Pulse discharge;Malter Effect;Atmospheric pressure cold plasmas;Phsyical and chemical activities;Volatile organic compounds