Physics and applications of atmospheric non-thermal air plasma with reference to environment
Physics and applications of atmospheric non-thermal air plasma with reference to environment
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DOI：
10.1088/0741-3335/51/12/124002
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发表时间：
2009-11
影响因子：
2.2
通讯作者：
E. Marode;D. Djermoune;Philippe Dessante;C. Deniset;Pierre Ségur;François Bastien;Anne Bourdon;Christophe O. Laux
中科院分区：
文献类型：
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作者：
E. Marode;D. Djermoune;Philippe Dessante;C. Deniset;Pierre Ségur;François Bastien;Anne Bourdon;Christophe O. Laux
由于空气是我们环境的自然组成部分，因此对大气压下空气中的等离子体及其应用的研究给予了特别的关注。这一事实促进了对类空气混合物（即含有电负性气体成分的混合物）中导电的研究。如果电离增长不受限制，其时间演化将导致火花形成，即在准局部热力学平衡状态下产生几千开尔文的热等离子体。但在达到这样的热状态之前，等离子体会形成，在那里电子的能量会增加，其特征是电子温度Te远高于重离子的T或T+。由于等离子体不再只有一个温度T的特征，因此它被称为处于非热等离子体（NTP）状态。列出了防止电子电离超出NTP状态的实用方法。对这种NTP的许多理解可以从一个简单的范例案例的研究中收集，该案例是在一个尖锐的正应力点电极与一个接地的负平面电极之间引起的放电。一些物理属性将从这些配置中收集，并强调这些属性与一些相关应用（主要是环境应用）之间的联系。气溶胶过滤和静电除尘器、通过去除烟气中含有的有害物质来控制污染、医疗目的的灭菌应用和触发汽车发动机的燃料燃烧都是这些应用。
Since air is a natural part of our environment, special attention is given to the study of plasmas in air at atmospheric pressure and their applications. This fact promoted the study of electrical conduction in air-like mixtures, i.e. mixtures containing an electronegative gas component. If the ionization growth is not limited its temporal evolution leads to spark formation, i.e. a thermal plasma of several thousand kelvins in a quasi-local thermodynamic equilibrium state. But before reaching such a thermal state, a plasma sets up where the electrons increase their energy characterized by an electron temperature Te much higher than that of heavy species T or T+ for the ions. Since the plasma is no longer characterized by only one temperature T, it is said to be in a non-thermal plasma (NTP) state. Practical ways are listed to prevent electron ionization from going beyond the NTP states. Much understanding of such NTP may be gathered from the study of the simple paradigmatic case of a discharge induced between a sharp positively stressed point electrode facing a grounded negative plane electrode. Some physical properties will be gathered from such configurations and links underlined between these properties and some associated applications, mostly environmental. Aerosol filtration and electrostatic precipitators, pollution control by removal of hazardous species contained in flue gas exhaust, sterilization applications for medical purposes and triggering fuel combustion in vehicle motors are among such applications nowadays.