Improved Performance for Toluene Abatement in a Continuous-Flow Pulsed Sliding Discharge Reactor Based on Three-Electrode Configuration
Improved Performance for Toluene Abatement in a Continuous-Flow Pulsed Sliding Discharge Reactor Based on Three-Electrode Configuration
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DOI：
10.1007/s11090-018-9939-6
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发表时间：
2018-10
影响因子：
3.6
通讯作者：
Nan Jiang;Cheng Qiu;Lianjie Guo;K. Shang;N. Lu;Jie Li;Yan Wu
中科院分区：
文献类型：
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作者：
Nan Jiang;Cheng Qiu;Lianjie Guo;K. Shang;N. Lu;Jie Li;Yan Wu
在基于三电极结构的连续流滑动介质阻挡放电（SLDBD）反应器中研究了低温等离子体对甲苯的降解，并与传统的表面介质阻挡放电反应器进行了比较。为了优化SLDBD反应器的电气和几何参数，系统地研究了正脉冲高压（U+pulse）、负直流电压（U-DC）、脉冲形成电容（Cp）、极间间隙、放电长度和介质材料的影响。形态学分析表明，在能量稍有增加的情况下，外加一个U − DC时，汽蒸通道可以沿着介质表面更均匀地传播. SLDBD堆的平均放电功率主要取决于U+脉冲，而U −DC对平均放电功率的影响较小。出乎意料的是，使用SLDBD的甲苯降解效率和能量产额都随着U-DC显著增加，这表明VOC降解不仅取决于U+脉冲提供的能量，而且还取决于U-DC诱导的电离物种的漂移。增加CpenchingSLDBD反应器的能量注入，导致更高的甲苯降解效率，但降低能量产量时，其他参数保持不变。最佳Cp值为0.67 nF。较短的电极间间隙和较长的放电长度似乎是更有利的甲苯降解和能量产率。石英板具有明显优于陶瓷和聚四氟乙烯的降解和能量性能，导致在这项工作中的最大甲苯降解效率为58%，能量产率为0.85 g/kWh。
The degradation of toluene by non-thermal plasma has been evaluated in a continuous-flow sliding dielectric barrier discharge (SLDBD) reactor based on three-electrode configuration and compared with a traditional surface dielectric barrier discharge reactor. In order to optimize the electrical and geometry parameters of the SLDBD reactor, the effects of positive pulsed high-voltage (U+pulse), negative DC voltage (U−DC), pulse-forming capacitance (Cp)), inter-electrode gap, discharge length, and dielectric material have been systematically investigated. Morphological characterizations demonstrate that the steamer channels can propagate more homogeneously along the dielectric surface when a sufficientU−DCis applied under the condition of slight increase in energy. The average discharge power of the SLDBD reactor mainly depends onU+pulse, while which is less affected byU−DC. Unexpectedly, both toluene degradation efficiency and energy yield using the SLDBD increase significantly asU−DC, indicating that VOC degradation is not only determined by the energy primarily provided byU+pulse, but also depends on the drift of the ionized species induced byU−DC. IncreasingCpenhances the energy injected into the SLDBD reactor and leads to a higher toluene degradation efficiency, but lowers the energy yield when the other parameters remains unchanged. The optimalCpis 0.67 nF. Shorter inter-electrode gap and longer discharge length appear to be more advantageous in terms of toluene degradation and energy yield. Quartz plate exhibits remarkably better degradation and energy performance than ceramic and polytef ones, leading to the maximum toluene degradation efficiency of 58% and energy yield of 0.85 g/kWh in this work.