Research of Liquid Phase Oxidation of Aliphatic Alcohols in Plasma Chemical Water Treatment

Plasma chemistry is part of the development of high technology that meets the modern requirements of greening and resource conservation. The study of physic-chemical laws and processes occurring in the zone of action of electric discharge plasma near the surface of a liquid is of high scientific and applied interest. In the study, developed and patented by a team of authors, plasma-chemical reactors were used, which implement the treatment of a liquid with both barrier and glow discharges near the surface of the liquid phase in a flow-through mode. Solutions of primary and secondary aliphatic alcohols were used as a model object of plasma-chemical treatment. As a result of the study, the mechanisms of liquid-phase oxidation of primary and secondary aliphatic alcohols during plasma-chemical treatment of water were proposed. The emission spectra of electric discharges at the gas-liquid interface in the presence of dissolved organic substances were obtained and analyzed. Spectral studies of electrodischarge plasma in the liquid-liquid zone confirmed the differing composition of the inorganic oxidation products of primary and secondary aliphatic alcohols. When deciphering the spectra of barrier and glow discharges, the characteristic emission bands of nitrogen N₂, OH-radicals and nitric oxide, as well as lines of atomic hydrogen H and oxygen O were shown. In addition, the effect of the nature of the organic substances contained in the treated water on the characteristics of the electric discharge plasma was shown

The work was supported by the Ministry of Science and Higher Education of the Russian Federation as a part of a state assignment (project FSSM-2020-0004)

References

[1] Mahyar A., Miessner H., Mueller S., et al. Development and application of different non-thermal plasma reactors for the removal of perfluorosurfactants in water: a comparative study. Plasma Chem. Plasma Process., 2019, vol. 39, no. 3, pp. 531--544. DOI: https://doi.org/10.1007/s11090-019-09977-6

[2] Kolb V.M. Green organic chemistry and its interdisciplinary applications. CRC Press, 2016.

[3] Bekeschus S., Favia P., Robert E., et al. White paper on plasma for medicine and hygiene: future in plasma health sciences. Plasma Process. Polym., 2019, vol. 16, iss. 1, special issue: The Future of Plasma Science, art. 1800033. DOI: https://doi.org/10.1002/ppap.201800033

[4] Zhang W., Cue B.W., eds. Green techniques for organic synthesis and medicinal chemistry. Wiley, 2012.

[5] Lu X., Reuter S., Laroussi M., et al. Nonequilibrium atmospheric pressure plasma jets. CRC Press, 2019.

[6] Shutov D.A., Sungurova A.V., Choukourov A., et al. Kinetics and mechanism of Cr(VI) reduction in a water cathode induced by atmospheric pressure DC discharge in air. Plasma Chem. Plasma Process., 2016, vol. 36, no. 5, pp. 1253--1269. DOI: https://doi.org/10.1007/s11090-016-9725-2

[7] Gushchin A.A., Grinevich V.I., Izvekova T.V., et al. The destruction of carbon tetrachloride dissolved in water in a dielectric barrier discharge in oxygen. Plasma Chem. Plasma Process., 2019, vol. 39, no. 2, pp. 461--473. DOI: https://doi.org/10.1007/s11090-019-09958-9

[8] Shutov D.A., Sungurova A.V., Smirnova K.V., et al. Kinetic features of chromium(VI) reduction and phenol degradation in aqueous solution by treatment in atmospheric-pressure air direct-current discharge. High Energy Chem., 2018, vol. 52, no. 1, pp. 95--98. https://doi.org/10.1134/S0018143918010125

[9] Shutov D.A., Sungurova A.V., Manukyan A.S., et al. Reduction--oxidation of chromium ions in aqueous solution by treatment with atmospheric-pressure direct-current discharge in argon. High Energy Chem., 2018, vol. 52, no. 5, pp. 429--432. DOI: https://doi.org/10.1134/S0018143918050144

[10] Ivanov A.N., Shutov D.A., Manukyan A.S., et al. Influence of non-uniformity of generation of active particles on deposition processes and redox reactions in a glow discharge in contact with water. Plasma Chem. Plasma Process., 2019, vol. 39, no. 1, pp. 63--73. DOI: https://doi.org/10.1007/s11090-018-9936-9

[11] Yakushin R.V., Kolesnikov V.A., Brodskii V.A., et al. Degradation of organic substances in aqueous solutions under the action of pulsed high-voltage discharges. Russ. J. Appl. Chem., 2015, vol. 88, no. 8, pp. 1338--1342. DOI: https://doi.org/10.1134/S1070427215080182

[12] Kandelaki G.I., Kolesnikov V.A., Brodskiy V.A., et al. Study of the influence of nonequilibrium dielectric-barrier discharge plasma on the valence state of transition metals in aqueous solutions. High Energy Chem., 2018, vol. 52, no. 2, pp. 183--188. DOI: https://doi.org/10.1134/S0018143918020157

[13] Yakushin R.V., Chistolinov A.V., Kolesnikov V.A., et al. Plazmokhimicheskiy reaktor obrabotki zhidkosti bar’yernym razryadom [Barrier discharge plasma chemical reactor for liquids]. Patent RU 173849. Appl. 18.04.2016, publ. 14.09.2017 (in Russ.).

[14] Yakushin R.V., Chistolinov A.V., Kolesnikov V.A., et al. Ustroystvo obrabotki zhidkostey bar’yernym razryadom [Barrier discharge device for treatment of liquids]. Patent RU 161968. Appl. 22.09.2015, publ. 20.05.2016 (in Russ.).

[15] Yakushin R.V., Chistolinov A.V., Kolesnikov V.A., et al. Plazmogazokataliticheskiy reaktor obrabotki zhidkosti [Plasma-gas-catalytic reactor for treatment of liquids]. Patent RU 189390. Appl. 30.01.2019, publ. 21.05.2019 (in Russ.).

[16] Reisz E., Tekle-Rottering A., Naumov S., et al. Reaction of 1-propanol with ozone in aqueous media. Int. J. Mol. Sci., 2019, vol. 20, iss. 17, special issue: The Structure and Function of the Second Phase of Liquid Water, pp. 4165--4185. DOI: https://doi.org/10.3390/ijms20174165

[17] Wittcoff H.A., Reuben B.G., Plotkin J.S. Industrial organic chemicals. Wiley, 2012.