Ozone and dinitrogen monoxide production in atmospheric pressure air dielectric barrier discharge plasma effluent generated by nanosecond pulse superimposed alternating current voltage
Ozone and dinitrogen monoxide production in atmospheric pressure air dielectric barrier discharge plasma effluent generated by nanosecond pulse superimposed alternating current voltage
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DOI：
10.1088/1361-6595/aa7082
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发表时间：
2017-06
影响因子：
3.8
通讯作者：
K. Takashima;T. Kaneko
中科院分区：
文献类型：
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作者：
K. Takashima;T. Kaneko
实验研究了纳秒脉冲叠加交流电压（NS + AC）对空气介质阻挡放电（DBD）等离子体和反应物种产生的影响，并沿着测量了空气DBD等离子体排出气体（空气等离子体流出物）中臭氧（O3）和一氧化二氮（N2 O）的含量。电荷-电压循环测量表明，纳秒脉冲叠加的作用是诱导电荷传输和多余的电荷积累的介质表面上的纳秒脉冲。发现NS + AC DBD中的O3和N2 O的密度在等离子体流出物中显著增加，与NS DBD和AC DBD单独操作中产生的那些密度的总和相比。O3和N2 O的产生被纳秒脉冲叠加的相位显著调制。发现纳秒脉冲的密度增加和调制效应与纳秒脉冲引起的电荷输运和过量电荷积累相对应。结果表明，纳秒脉冲的电荷传输可能导致纳秒脉冲电流的增强，这可能导致更有效的分子解离，并且纳秒脉冲诱导的过量电荷积累增加了放电耦合功率，这将促进分子解离。
The effects of nanosecond pulse superposition to alternating current voltage (NS + AC) on the generation of an air dielectric barrier discharge (DBD) plasma and reactive species are experimentally studied, along with measurements of ozone (O3) and dinitrogen monoxide (N2O) in the exhausted gas through the air DBD plasma (air plasma effluent). The charge-voltage cycle measurement indicates that the role of nanosecond pulse superposition is to induce electrical charge transport and excess charge accumulation on the dielectric surface following the nanosecond pulses. The densities of O3 and N2O in NS + AC DBD are found to be significantly increased in the plasma effluent, compared to the sum of those densities generated in NS DBD and AC DBD operated individually. The production of O3 and N2O is modulated significantly by the phase in which the nanosecond pulse is superimposed. The density increase and modulation effects by the nanosecond pulse are found to correspond with the electrical charge transport and the excess electrical charge accumulation induced by the nanosecond pulse. It is suggested that the electrical charge transport by the nanosecond pulse might result in the enhancement of the nanosecond pulse current, which may lead to more efficient molecular dissociation, and the excess electrical charge accumulation induced by the nanosecond pulse increases the discharge coupling power which would enhance molecular dissociation.