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Low temperature plasma decompositionLow-temperature plasma technology, also known as non-equilibrium plasma technology, generates a large number of high-energy particles through dielectric discharge under the action of an applied electric field. High-energy particles and organic pollutant molecules undergo a series of complex plasma physical and chemical reactions, thus organic The pollutants are degraded into non-toxic and harmless substances.The low temperature plasma is the fourth state of the substance after the solid state, the liquid state, and the gaseous state. When the applied voltage reaches the discharge voltage of the gas, the gas molecules are broken down to produce a mixture including electrons, various ions, atoms and radicals. . Although the electron temperature is high during discharge, the temperature of the heavy particles is very low, and the whole system exhibits a low temperature state, so it is called a low temperature plasma. Low-temperature plasma degradation of pollutants is the use of these high-energy electrons, free radicals and other active particles and pollutants in the exhaust gas, so that the pollutant molecules decompose in a very short time, and subsequent various reactions to achieve degradation of pollutants the goal of.During the plasma chemical reaction process, the energy transfer during the reaction of the plasma transfer chemical energy is as follows:(1) Electric field + electron → high energy electron(2) High energy electrons + molecules (or atoms) → (excited atoms, excited groups, free groups) Reactive groups(3) Reactive group + molecule (atomic) → product + heat(4) Reactive group + reactive group → product + heatLow temperature plasma technology for treating organic waste gas has the following advantages:1 low energy consumption, can react with the catalyst at room temperature, without heating, greatly saving energy;2 Convenient to use, can be adjusted according to air volume changes and site conditions during design;3 does not produce by-products, the catalyst can selectively degrade by-products generated in the plasma reaction;weakness is:1 is sensitive to water vapor, when the water vapor content is higher than 5%, the treatment efficiency and effect will be affected;2 It is sensitive to dust-containing gas, and the treatment efficiency is obviously reduced.

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