等离子综合性技术有哪些？ What are the comprehensive plasma technologies?

等离子综合性技术有哪些？

     等离子体技术是一个集物理学、化学、生物学和环境科学于一体的交叉综合性技术，该技术显著特点是对污染物兼具物理效应、化学效应和生物效应，且有能耗低、效率高、无二次污染等明显优点。

    原理：

    采用等离子体分解油雾、废气等污染介质时，等离子体中的等离子起决定性的作用。流星雨状的等离子与介质内分子（原理）发生非弹性碰撞，将能量转化成基态分子（原子）的内能，发生激发、离解、电离等一系列过程使污染介质处于活化状态。污染介质在等离子体的作用下，产生活性自由基，活化后的污染物分子经过等离子体定向链化学反应后被脱除。当离子平均能量超过污染介质中化学键结合能时，分子链断裂，污染介质分解，并在等离子发生器吸附场的作用下被收集。在等离子体中，可能发生各类型的化学反应，这主要取决于等离子的平均能量、离子密度、气体温度、污染物介质内分子浓度及共存的介质成分。

    对气态有机污染物的降解机理：

     有足够的能量来产生自由基，引发一系列复杂的物理、化学反应。由低 温 等 离子体引起的气体有机物化学反应是在气相中进行的电离、离解、激发、原子.分子间的相互结合及加成反应。这个能量足以使大多数气态有机物中的化学键发生断裂，从而使其降解。

                                                What are the comprehensive plasma technologies?

  Plasma technology is a cross comprehensive technology that integrates physics, chemistry, biology and environmental science. Its remarkable feature is that it has physical, chemical and biological effects on pollutants, and has obvious advantages such as low energy consumption, high efficiency and no secondary pollution.

Principle:

  Plasma plays a decisive role in the decomposition of oil mist, exhaust gas and other polluting media by plasma. The meteor shower plasma collides with the molecules (Principles) in the medium inelastically, transforms the energy into the internal energy of the ground state molecules (atoms), and generates a series of processes such as excitation, dissociation and ionization, which make the polluted medium in an active state. Under the action of plasma, the polluted medium produces active free radicals, and the activated pollutant molecules are removed after the chemical reaction of plasma oriented chain. When the average energy of ions exceeds the binding energy of chemical bonds in the polluted medium, the molecular chain breaks, the polluted medium decomposes and is collected under the action of the adsorption field of the plasma generator. In plasma, various kinds of chemical reactions may occur, which mainly depends on the average energy of plasma, ion density, gas temperature, molecular concentration in pollutant medium and coexisting medium composition.

Degradation mechanism of gaseous organic pollutants:

   There is enough energy to produce free radicals and initiate a series of complex physical and chemical reactions. The chemical reactions of gas organic compounds caused by low temperature plasma are ionization, dissociation, excitation, atom molecule interaction and addition reactions in the gas phase. This energy is enough to break the chemical bonds in most gaseous organics and degrade them.