净化机理
净化机理
Purification mechanism
等离子体化学反应过程中,等离子体传递化学能量的反应过程中能量的传递大致如下:
In the process of plasma chemical reaction, the energy transfer in the reaction process is roughly as follows:
(1) 电场+电子→高能电子
(1) Electric field + electron → high energy electron
(2) 高能电子+分子(或原子)→(受激原子、受激基团、游离基团) 活性基团
(2) High energy electron + molecule (or atom) → (excited atom, excited group, free group) active group
(3) 活性基团+分子(原子)→生成物+热
(3) Active group + molecule (atom) → product + heat
(4) 活性基团+活性基团→生成物+热
(4) Active group + active group → product + heat
从以上过程可以看出,电子首先从电场获得能量,通过激发或电离将能量转移到分子或原子中去,获得能量的分子或原子被激发,同时有部分分子被电离,从而成为活性基团;之后这些活性基团与分子或原子、活性基团与活性基团之间相互碰撞后生成稳定产物和热。另外,高能电子也能被卤素和氧气等电子亲和力较强的物质俘获,成为负离子。这类负离子具有很好的化学活性,在化学反应中起着重要的作用。
It can be seen from the above process that the electron first obtains energy from the electric field and transfers the energy to molecules or atoms by excitation or ionization. The molecules or atoms that obtain energy are excited, and some molecules are ionized to become active groups. Then, stable products and heat are generated after these active groups collide with molecules or atoms, active groups and active groups 。 In addition, high-energy electrons can also be trapped by halogen and oxygen with strong electron affinity and become negative ions. These anions have good chemical activity and play an important role in chemical reactions.