Low temperature plasma technology has significant advantages in the treatment of gaseous pollutants. The basic principle is to generate high-energy electrons under the acceleration of an electric field. When the average energy of the electrons exceeds the chemical bond energy of the target substance molecule, the molecular bonds break, achieving the goal of eliminating gaseous pollutants.1980In the era, the University of Tokyo in JapanS．MasudaThe high-voltage pulse corona discharge method proposed by the professor is a simple and effective method for obtaining low-temperature plasma at room temperature and pressure. It has become the forefront of current research and is increasingly being used for the treatment of gaseous pollutants.
The mechanism of low-temperature plasma removal of pollutants:
In the process of plasma chemical reaction, the transfer of chemical energy by plasma is roughly as follows:
(1)Electric field+electrons → high-energy electrons
(2)High energy electrons+molecules(Or atoms)→(Stimulated atoms, stimulated groups, free groups)active group
(3)Active groups+molecules(atom)→ Produce+heat
(4)Active groups+active groups → products+heat
From the above process, it can be seen that electrons first obtain energy from the electric field, and transfer the energy to molecules or atoms through excitation or ionization. The molecules or atoms that obtain energy are excited, while some molecules are ionized, thus becoming active groups; Afterwards, these active groups collide with molecules or atoms, as well as with each other, to generate stable products and heat. In addition, high-energy electrons can also be captured by substances with strong electron affinity such as halogens and oxygen, becoming negative ions. These negative ions have excellent chemical activity and play an important role in chemical reactions.
The principle of low-temperature plasma removal of pollutants:
The principle of low-temperature plasma technology for treating pollutants is: under the action of an external electric field, a large number of energy carrying electrons generated by dielectric discharge bombard pollutant molecules, causing ionization, dissociation, and excitation, and then triggering a series of complex physical and chemical reactions, transforming complex large molecule pollutants into simple small molecule safe substances, or transforming toxic and harmful substances into non-toxic and harmless or low toxicity and low harm substances, thereby degrading and removing pollutants. Due to the average energy of electrons generated after ionization10evProperly controlling the reaction conditions can make chemical reactions that are generally difficult to achieve or slow in speed very fast. As a high-tech with potential advantages in the field of environmental pollution treatment, plasma has received high attention from relevant disciplines both domestically and internationally.
Application of Low Temperature Plasma Technology in Environmental Engineering:
The application of low-temperature plasma technology in exhaust gas treatment With the development of industrial economy, volatile organic waste gases generated by industries such as petroleum, pharmaceuticals, paints, printing, and coatings are also increasing. These waste gases not only stay in the atmosphere for a long time, but also spread and drift to distant places, causing serious pollution to the environment. When these waste gases are inhaled into the human body, they directly pose great harm to human health; In addition, uncontrolled emissions of industrial flue gas have led to a worsening global atmospheric environment, including acid rain(Mainly derived from industrial emissions of sulfur oxides and nitrogen oxides)The harm caused by it has attracted the attention of various countries. Due to the pollution and acidification of the atmosphere, the ecological environment has been damaged, major disasters have occurred frequently, and enormous losses have been caused to humanity. Therefore, it is imperative to choose an economical and feasible processing method.
Degradation of volatile organic pollutants(VOCs)Traditional processing methods such as absorption, adsorption, condensation, and combustion are effective for low concentrationVOCsDifficult to achieve, but photocatalytic degradationVOCsThere is also a problem of catalyst deactivation, which can be addressed through low-temperature plasma treatmentVOCsIt is not limited by the above conditions and has potential advantages. However, plasma is an interdisciplinary field that includes fundamental disciplines such as discharge physics, discharge chemistry, chemical reaction engineering, and vacuum technology. therefore,Currently, there are very few units that can mature and master this technology. Most of the promotions about using low-temperature plasma technology to treat exhaust gas are not true low-temperature plasma exhaust gas treatment technology.

Product performance parameters:(Single group plasma exhaust gas treatment equipment module)