Review of research on VOCs treatment by gliding arc plasma
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摘要:
滑动弧等离子体兼具热等离子体和冷等离子体的优势，在挥发性有机物（VOCs）的去除中展现了很好的应用前景。在阐述滑动弧等离子体产生原理及基本特性的基础上，介绍了现有各种类型的滑动弧发生器及其特点。通过对国内外相关文献的归纳和整理，总结了影响滑动弧等离子体处理VOCs效率的关键影响因素以及不同类型滑动弧反应器去除VOCs的性能差异。最后，对滑动弧等离子体净化VOCs机理进行了探讨，并展望了该技术今后的研究方向。
Abstract:Gliding arc plasma combines the advantages of both thermal and cold plasma, showing great application prospects in volatile organic compounds (VOCs) removal. Various types of gliding arc generators and their characteristics were introduced based on the exposition of the generation principle and basic properties of gliding arc plasma. By summarizing and collating the relevant literature at home and abroad, the key factors affecting the removal efficiency of VOCs and the differences in the performance of different gliding arc reactors in VOCs abatement were summarized. Finally, the mechanism of VOCs purification by gliding arc plasma was discussed and the future research directions of this technology were prospected.
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Key words:
- gliding arc discharge /
- volatile organic compounds /
- degradation /
- mechanism
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图 2 切向进气旋转滑动弧的产生和电弧伸展过程[24]
Figure 2. Generation and extension process of rotating gliding arc driven by tangential flow
图 3 磁场驱动旋转滑动弧原理[25]
1—阳极； 2—阴极；3—起弧金属线。
Figure 3. Schematic diagram of rotating gliding arc driven by magnetic field
表 1 不同类型滑动弧等离子体降解VOCs性能与参数的比较
Table 1. Degradation performance and parameter comparison of various gliding arc plasma for VOCs destruction
滑动弧类型 VOCs种类 载气 浓度/（g/m3） 流速/(L/min) 去除率/% 能量效率/〔g/(kW·h)〕 数据来源 刀片式滑动弧 甲苯 空气 1.47 30 60 3.1 文献[37] 甲苯 氮气、水蒸气 9.5~23.4 3.5 >35 32.1~46.3 文献[35] 甲苯 氮气、氧气、二氧化碳、水蒸气 14.8 3.5 78.3 69.5 文献[41] 甲苯 空气 12.0 13 78 36.6 文献[31] 甲苯 空气、二氧化碳 7.0 17 53 22.2 文献[42] 苯、甲苯、二甲苯 空气 4.0~20.0 5 >40 8.4~19.0 文献[43] 苯 空气 30.0 2~4.5 73 87.8 文献[44] 二甲苯 空气 0.7 2000 81 5.0 文献[45] 蒽、芘 空气、氮气、
氧气、氩气0.67 6.8 92.3 3.6 文献[46] 甲苯、萘 氮气 2~22 4 60~86 2.6~21.1 文献[39] 切向进气旋转滑动弧 甲苯 空气 0.2~2.0 90 77 2.1~15.2 文献[32] 甲苯、萘、菲 氮气、二氧化碳 12.0 12 >84 10.2 文献[36] 磁驱动旋转滑动弧 甲苯 氮气 14.0 10 >80 16.6 文献[33] 甲苯、萘 氮气、二氧化碳 26.0 6 >70 21.3 文献[38] 龙旋风滑动弧 硫化氢 硫化氢 — 2~14 — — 文献[27] 六氯苯 飞灰 4.5~16.5×10−3 13 66~72 — 文献[47] 多电极滑动弧 甲苯 空气 7.3 33.3 92 16.6 文献[48] 庚烷 空气 9.4 30 100 16.6 文献[48] 丁酮 空气 6.4 53.3 66 10.0 文献[48] 四氯乙烯 空气 3.6 31.6 100 1.1 文献[48] 苯 氮气 8.0 16.7 82 42.1 文献[34] 芘 氮气 0.13 12 88 0.13 文献[49] 蒽 氮气 0.21 10 96 1.14 文献[50] 
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表 2 滑动弧等离子体去除VOCs的放大试验
Table 2. Scaled-up experiments of gliding arc plasma for VOCs abatement
规模 装置 处理对象 处理量/
（m3/h）去除
率/%能耗/
(kW·h/m3)实验室规模 刀片式滑动弧 甲苯 2 >98 0.42 中试规模 刀片式滑动弧 二甲苯 120 >90 0.1 多电极滑动弧 丙烷、丁烷 80 >54 0.044 多电极滑动弧
（六段式串联）三硝基甲苯 50 >95 0.06 工业规模 多电极滑动弧
（活性炭吸附再生+四组并联三组串联）苯、甲苯、二甲苯、甲醛 25 000 >80 0.001
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