Non-thermal plasma (NTP) is regarded as a potential application for environmental pollution control due to its ability to remove pollutants. As a major precursor of dioxins, the influence of the parameters of 1,2,4-trichlorobenzene (TCB) decomposition using NTP technology was investigated through a series of experiments, including voltage, frequency, water content, initial concentration, flow rate, and oxygen content. The experimental results show that the energy injected into the NTP system has a positive correlation to voltage and frequency. Oxygen has the greatest influence on TCB decomposition. The optimal reaction condition was at 15 kV, 1000 Hz, an initial concentration of 20 mg m −3 , a flow rate of 2 l min −1 , H 2 O at 4%, and O 2 at 0%. Under this condition, the TCB removal efficiency could reach 92%. According to the generated product backstepping, the hydroxyl radical (•OH) plays an important role in TCB decomposition due to its strong oxidation, which participates in the dechlorination and oxidation reactions as free radicals, and the possible decomposition pathway of TCB by NTP is inferred from the identified byproducts. It is of great significance to investigate the influence of the parameters of TCB decomposition using NTP technology in order to provide references for industrial application.
In this paper, narrow-pulse power discharge is used to study the synergistic control of mercury and dioxins, in which 1,2,4-trichlorobenzene (TCB) was used as a dioxin analog, by using a selfdesigned experimental system. The competitive effects of NO, SO 2 and HCl on the TCB removal by non-thermal plasma are discussed. The influence of acid gas on TCB degradation is reflected in the competitive effect. NO has the greatest influence on TCB degradation efficiency. The oxidation efficiency of Hg 0 decreased by about 10% in all three acidic gas atmospheres, and the effect of each gas component on Hg 0 oxidation is complex. In the flue gas atmosphere of 'acid gas+Hg 0 +TCB', the mechanism of the synergistic control of Hg 0 and TCB by the nonthermal plasma is different, which has competition and promotion relationship between each other. The contribution of various flue gas components to the results was complicated, but the overall experimental results show that the synergistic control effect of the system can continue to improve. According to the generated product backstepping, •OH plays an important role in the synergistic control of the degradation of Hg 0 and TCB. Through this study, we hope to provide basic research data for the collaborative control of flue gas in the incineration industry.
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