1,2,4-trichlorobenzene decomposition using non-thermal plasma technology

Abstract

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.

Study on Degradation of 1,2,4-TrCB by Sugarcane Cellulose-TiO2 Carrier in an Intimate Coupling of Photocatalysis and Biodegradation System

“…The aromatic compounds were, respectively, C 6 H 4 Cl 2 (o-dichlorobenzene, p-dichlorobenzene), C 11 H 10 O 6 (3,4-bismethoxycarbonyl benzoic acid), C 14 H 22 O (2,4-di-dutylphenol), and C 16 H 22 O 4 (1,2-dicarboxylate -dibutyl benzene) and the chain compounds included C 10 H 22 O (tetra-hydrolavandulol), C 10 H 20 O (2-decenol), C 8 H 18 O (2-ethylhexanol), and C 6 H 14 O 2 (3-Hexyl hydroperoxide), with the functional carboxyl and hydroxyl groups. As described above, photocatalysis significantly contributed to 1,2,4-TrCB degradation, of which the reactions of substitution, addition, and ring opening occurred by the oxidization of active species and produced a series of simple organic compounds [ 36 ].…”

Chlorobenzene Removal Using DBD Coupled with CuO/γ-Al2O3 Catalyst

“…Benzene, 1,2 (or 1,3 or 1,4)-dichloro- In previous studies, Zhu et al thought that the chlorinated aromatic organic compounds would undergo dechlorination first, and then the benzene ring would be opened under the attack of active particles [59]. When analyzing the degradation process of chlorobenzene, Shahna, Haibao Huang considered that OH• radical played an important role in the degradation process of chlorobenzene [60,61].…”

Study of selective hydrogenation of biodiesel in a DBD plasma reactor

“…Normally, non-thermal plasmas have been produced by gas discharges; the commonly used discharge forms include coronal discharge, glow discharge, spark discharge, and dielectric-barrier discharge. The energy of free electrons generated by dielectric-barrier discharge is in the range of 1-10 eV, which is suitable for breaking most chemical bonds [17][18][19][20][21][22], and the discharge can be stable and uniformly distributed in the discharge zone, so dielectric-barrier discharge is the preferred choice for non-thermal plasma generation.…”