【作者】 李晓蓓；

【导师】 孙冰；

【作者基本信息】 大连海事大学 ， 环境科学， 2008， 硕士

【摘要】 空气中的挥发性有机物（简称VOCs）的污染问题及其有效控制已经受到人们的普遍关注。近年,对于气态低浓度的VOCs用放电等离子体进行降解处理引起了世界各国研究者高度关注。该技术可以实现常温常压下,非常短的时间内,对浓度变化范围较大的多种气态污染物进行同时降解。本论文利用介质阻挡放电反应器进行了脱除挥发性有机物废气-环己酮的研究。通过研究发现:环己酮的脱除率随着极间电压,重复频率的升高而增加,随着气体流速和环己酮的进口浓度的增加而降低。当脉冲重复频率为10kHz,反应器所加脉冲峰值电压为8000V,总流速0.46m³/h,环己酮初始浓度为50 ml/m³时,对于环己酮的脱除率达到100%,证明了常温常压下的介质阻挡放电对环己酮的去除是十分有效的。设计了水电极介质阻挡放电实验装置,对大气压下介质阻挡放电在不同条件下的放电形貌演化过程及放电特性进行了实验研究,通过峰值电压,重复频率及放电间隙等条件的改变考察其放电特性的变化。利用发射光谱法进行了大气压下空气中介质阻挡放电的等离子体诊断研究。在常温常压下测量了N₂的第二正系跃迁（C³Пu→B³Пg）和N₂⁺的第一负系跃迁中B²∑⁺u→X²∑⁺g的跃迁的发射光谱强度以及其与峰值电压、重复频率之间的关系。通过研究发现,体系内高能粒子的数量是影响环己酮脱除效果的最重要因素。更多还原

【Abstract】 The pollution control of volatile organic compounds（VOCs） is receiving more and more attention.Recently,non-thermal plasma technology is regarded as a more promising new technology in VOCs control all over the world.In atmospheric temperature and room pressure,different VOCs at various concentration can be decomposed by this technology immediately.In this article,dielectric barrier discharge（DBD） was used to remove the dynamic cyclohexanone underatmospheric pressure.it was found that in the same power parameters,with an increase of voltage and frequence,the removal efficiency of cyclohexanone also increased,while it would decrease when the concentrate of cyclohexanone or gas flow rate climbed up.The removal efficiency of cyclohexanone（50 ml/m³） was 100%when the voltage was 8000 V,frequence was 10 kHz and total gas flowrate was 0.46 m³/h.The result indicated that DBD had good effect on removal of cyclohexanone.A water electrode experimental facility setup of dielectric barrier discharge was designed.In this article,the effect of applied excitation voltage,) repetition frequency and discharges gap width on discharge images characteristics of DBD was investigatedThe emission spactras were analyzed by using spectral diagnosis equipment at atmospheric pressure.The relationships between N₂（C³Пu→B³Пg） emission spectrum relative intensity and peak voltage,are measured by means of emission spectrum method at room temperature and atmospheric pressure which is advantage and practical for plasma characteristic diagnosis,it was indicated that the quantity of active particles was the critical factor of cyclohexanone remove更多还原