Decomposition of сarbon tetrachloride under the action of a dielectric barrier discharge of atmospheric pressure in an oxygen atmosphere

Gushchin, Andreiy A.; Grinevich, V. I.; Izvekova, Tatyana V.; Kvitkova, Elena Yu.; Tyukanova, Kseniya A.; Рыбкин, В. В.

doi:10.1016/j.chemosphere.2020.129392

Cited by 5 publications

(4 citation statements)

References 39 publications

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“…Since the mole fraction of 2,4-DCP is ~ 10 − 4 , one can expect a negligible effect of the 2,4-DCP content on the EEDF and rate constants involving electrons. For a speci c discharge power of 0.8 W/cm 3 , the average value of E/N over the period is 150 Td, and the current value is 1 mA [32]. Solving the Boltzmann equation for the indicated parameters as described in [33], we calculated the electron drift velocity (V D ).…”

Section: Resultsmentioning

confidence: 99%

Destruction of 2,4-dichlorophenol vapor in a process involving the combined action of DBD in oxygen and a catalyst

Lapshova,

Gordina,

Kvitkova

et al. 2024

Preprint

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In this work, the process of decomposition of 2,4-dichlorophenol (2,4-DCP) vapor under the influence of atmospheric pressure DBD in oxygen was studied. The studies were carried out in two modes: with a catalyst (natural vermiculite doped with zirconium) and without it. A number of basic characteristics of the catalyst were assessed. The rates and effective rate constants of sorption processes, as well as decomposition processes in plasma and plasma-catalytic systems, were determined. Based on these data, the energy efficiency of the decomposition process was calculated. The data obtained suggested that the initial stage of decomposition is the reaction of interaction of electrons with pollutant molecules. The catalyst has been shown to speed up the decomposition process, increase energy efficiency and the conversion of 2,4-DCP to CO2 molecules, and prevent the formation of condensed products on the reactor walls. The work estimates the carbon and chlorine balances before and after treatment, which reach a maximum of 99 and 60%, respectively. It was also shown that the catalyst retains its activity for at least 7 hours of continuous operation.

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Section: Resultsmentioning

confidence: 99%

Destruction of 2,4-dichlorophenol vapor in a process involving the combined action of DBD in oxygen and a catalyst

Lapshova,

Gordina,

Kvitkova

et al. 2024

Preprint

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“…Studies have shown that the kinetics of the destruction of CCl4, 2,4-DCP, 1,4-DCB (dependence of the concentration at the outlet of the reactor as a function of the residence time of gas in the discharge zone) is well described by a formal equation of the first kinetic order (determination coefficient R2 > 0.95) (see, for example, Fig. 5) [23][24][25]. Some rate constants and decomposition rates are presented in Table 1.…”

Section: Kinetics Of Destruction Of Vapor-gas Mixturesmentioning

confidence: 99%

Gas Discharges as a Tool for Cleaning Gas and Solution Mediums and Synthesis of Inorganic Materials

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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The article provides an overview of the results of research of the purification processes of gas and solution media from organic (tetrachloromethane, 1,4-dichlorobenzene and 2,4-di-chlorophenol, etc.) and inorganic (Cr(VI), Mn(VII), Cu2+, Fe2+3+, Zn2+, Cd2+, Ni2+, etc.) substances, as well as the synthesis of oxide materials based on the above metals under the action of a dielectric barrier discharge (DBD) and atmospheric pressure DC discharge. The work was carried out in joint research conducted at the Departments of Industrial Ecology and Microelectronic Devices and Materials of the ISUCT over the past 10 years. As a result of the research, the kinetic regularities of decomposition of the above organic substances were revealed, i.e. the rate and effective rate constants of the decomposition reactions and their dependences on the DBR parameters (power, gas and solution flow rates) were determined. On the basis of these data, the energy efficiency of decomposition processes was found. The main decomposition products and their dependence on the discharge parameters are determined. Probable mechanisms of the ongoing processes were proposed. It is shown that the action of a direct current discharge on aqueous solutions leads to the reduction of Cr(VI) and Mn(VII) in the composition of Cr2O72- and MnO4- to Cr3+ and Mn2+ ions. When the same discharge acts on solutions of salts containing Cu2+, Fe2+3+, Zn2+, Cd2+, Ni2+ ions, the formation of colloidal solutions of hydroxo compounds of these ions is observed. The sizes of resulting particles, their phase and chemical composition were determined by DLS, SEM, EDX, TGA, XRD, DSC methods. It is shown that the calcination of the obtained particles leads to the formation of crystalline oxides of the corresponding metals. Thus, the action of the discharge ensures the purification of aqueous solutions from heavy metals with the formation of oxide materials of the nanoscale range, which have semiconductor and catalytic properties. For citation: Guschin A.A., Grinevich V.I., Kvitkova E.Yu., Gusev G.I., Shutov D.A., Ivanov A.N., Manukyan A.S., Rybkin V.V. Gas discharges as a tool for cleaning gas and solution mediums and synthesis of inorganic materials. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2023. V. 66. N 7. P. 120-131. DOI: 10.6060/ivkkt.20236607. 6835j.

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“…18 Also the excited states of mixed carbenes CXY were characterized by high resolution electronic spectroscopy. [19][20][21][22] Here we focus on the trichloromethyl radical, CCl3, which appears as an intermediate in the photodissociation of chloroalkanes and -alkenes in the upper atmosphere, 23,24 compounds that are involved in stratospheric ozone depletion. The kinetics of the CCl3 + O2 reaction has also been monitored because of its relevance in plasma etching.…”

Section: A Introductionmentioning

confidence: 99%

Photodissociation of the trichloromethyl radical: photofragment imaging and femtosecond photoelectron spectroscopy

Matthaei

Mukhopadhyay

Röder

et al. 2022

Phys. Chem. Chem. Phys.

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Decomposition of сarbon tetrachloride under the action of a dielectric barrier discharge of atmospheric pressure in an oxygen atmosphere

Cited by 5 publications

References 39 publications

Destruction of 2,4-dichlorophenol vapor in a process involving the combined action of DBD in oxygen and a catalyst

Destruction of 2,4-dichlorophenol vapor in a process involving the combined action of DBD in oxygen and a catalyst

Gas Discharges as a Tool for Cleaning Gas and Solution Mediums and Synthesis of Inorganic Materials

Photodissociation of the trichloromethyl radical: photofragment imaging and femtosecond photoelectron spectroscopy

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