The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
Yu. F. Patrakov - One of the best experts on this subject based on the ideXlab platform.
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Disperse Composition of a Coal Flotation Reagent (Spent-Oil Emulsion)
Coke and Chemistry, 2020Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. Klein, T. E. VakhoninaAbstract:The dispersity of an emulsion of treated mineral oil used as a coal-flotation reagent is studied by laser diffraction. A finely disperse oil emulsion in water is produced by selecting optimal duration and intensity of dispersion. Ozonization is used to improve the reagent’s flotational activity. The influence of Ozonization on the size distribution of the oil droplets in emulsification is assessed.
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Flotational Enrichment of Low-Quality and Oxidized Coal Using Spent Motor Oil
Coke and Chemistry, 2018Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. Klein, B. AvidAbstract:The flotation of low-quality Russian and Mongolian coal by means of spent motor oil is investigated. Ozonization is used to improve the flotational properties of the spent oil. The optimal Ozonization depth of oil used to enrich coal of poor metamorphic development is 5–6 g/kg. Ozonization increases the oil’s content of oxygen-bearing heteropolar compounds, which determine its flotation properties. In addition, the viscosity declines. The use of ozonized spent oil improves the flotation of gas coal by 24%. Flotation of naturally oxidized gas coal by spent oil, before and after Ozonization, is poor and requires large quantities of reagents.
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Benefits of Ozonized Petroleum Products in Coal Flotation
Coke and Chemistry, 2018Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. KleinAbstract:The influence of Ozonization on the composition and flotation properties of petroleum and petroleum distillate fractions is considered. Preliminary Ozonization is found to promote the formation of apolar hydrocarbon collectors of various oxygen-bearing compounds. That permits more effective flotation of coal slurry.
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Effect of Reaction Medium on the Yield and Composition of the Products of the Liquid-Phase Ozonization of Brown Coal
Solid Fuel Chemistry, 2018Co-Authors: S A Semenova, Yu. F. PatrakovAbstract:The effect of solvent polarity on the yield and composition of the Ozonization products of brown coal from the Balakhtinskoe deposit was studied. The greatest yield of soluble oxygen-containing products was obtained upon Ozonization in polar solvents—glacial acetic acid and acetone. The application of chlorinated solvents and lower alcohols, including their aqueous solutions, was less effective.
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flotational enrichment of coking coal by means of spent motor oil
Coke and Chemistry, 2017Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. KleinAbstract:The flotation of coking coal (metamorphic stages II–IV) by means of ozonized spent motor oil is considered. The ozonized oil exhibits high flotational activity with respect to coal of poor and moderate metamorphic development: Ro < 1.2%. Ozonization improves the selectivity of the motor oil in flotation by a factor of 2–3.
S A Semenova - One of the best experts on this subject based on the ideXlab platform.
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Disperse Composition of a Coal Flotation Reagent (Spent-Oil Emulsion)
Coke and Chemistry, 2020Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. Klein, T. E. VakhoninaAbstract:The dispersity of an emulsion of treated mineral oil used as a coal-flotation reagent is studied by laser diffraction. A finely disperse oil emulsion in water is produced by selecting optimal duration and intensity of dispersion. Ozonization is used to improve the reagent’s flotational activity. The influence of Ozonization on the size distribution of the oil droplets in emulsification is assessed.
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Flotational Enrichment of Low-Quality and Oxidized Coal Using Spent Motor Oil
Coke and Chemistry, 2018Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. Klein, B. AvidAbstract:The flotation of low-quality Russian and Mongolian coal by means of spent motor oil is investigated. Ozonization is used to improve the flotational properties of the spent oil. The optimal Ozonization depth of oil used to enrich coal of poor metamorphic development is 5–6 g/kg. Ozonization increases the oil’s content of oxygen-bearing heteropolar compounds, which determine its flotation properties. In addition, the viscosity declines. The use of ozonized spent oil improves the flotation of gas coal by 24%. Flotation of naturally oxidized gas coal by spent oil, before and after Ozonization, is poor and requires large quantities of reagents.
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Benefits of Ozonized Petroleum Products in Coal Flotation
Coke and Chemistry, 2018Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. KleinAbstract:The influence of Ozonization on the composition and flotation properties of petroleum and petroleum distillate fractions is considered. Preliminary Ozonization is found to promote the formation of apolar hydrocarbon collectors of various oxygen-bearing compounds. That permits more effective flotation of coal slurry.
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Effect of Reaction Medium on the Yield and Composition of the Products of the Liquid-Phase Ozonization of Brown Coal
Solid Fuel Chemistry, 2018Co-Authors: S A Semenova, Yu. F. PatrakovAbstract:The effect of solvent polarity on the yield and composition of the Ozonization products of brown coal from the Balakhtinskoe deposit was studied. The greatest yield of soluble oxygen-containing products was obtained upon Ozonization in polar solvents—glacial acetic acid and acetone. The application of chlorinated solvents and lower alcohols, including their aqueous solutions, was less effective.
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flotational enrichment of coking coal by means of spent motor oil
Coke and Chemistry, 2017Co-Authors: Yu. F. Patrakov, S A Semenova, M.s. KleinAbstract:The flotation of coking coal (metamorphic stages II–IV) by means of ozonized spent motor oil is considered. The ozonized oil exhibits high flotational activity with respect to coal of poor and moderate metamorphic development: Ro < 1.2%. Ozonization improves the selectivity of the motor oil in flotation by a factor of 2–3.
V. V. Goncharuk - One of the best experts on this subject based on the ideXlab platform.
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Photocatalytic destruction of anionic SAS by ozone and oxygen
Journal of Water Chemistry and Technology, 2013Co-Authors: Yu. O. Shvadchina, A. N. Sova, V.f. Vakulenko, V. V. GoncharukAbstract:The article has investigated photocatalytic destruction of anionic SAS—sodium alkylbenzene sulfate (ABS) in the aqueous medium by ozone on TiO_2 Degussa P-25 at UV radiation by a DB-15 low-pressure mercury-quartz lamp. The paper has determined the parameters of photocatalytic Ozonization securing complete ABS destruction (100% in terms of organic carbon). We have assessed advantages of photocatalytic Ozonization of ABS solutions compared with photocatalytic oxidation by oxygen and O_3/UV treatment.
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Photocatalytic destruction of fulvic acids by ozone and oxygen
Journal of Water Chemistry and Technology, 2013Co-Authors: V. V. Goncharuk, V.f. Vakulenko, T. N. Sitnichenko, Yu. O. Shvadchina, A. N. SovaAbstract:We have studied destruction of river fulvic acids in water environment with ozone and oxygen. We have also determined advantages of catalytic and photocatalytic Ozonization of their solutions compared with Ozonization and O_3/UV treatment. Photocatalytic Ozonization secures the highest degree of destruction of fulvic acids (93% in terms of total organic carbon) at a shorter time and specific consumption of ozone compare with other methods of oxidation.
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Impact of hydrogen peroxide on the destruction degree of fulvic acids and organic impurities of river water by ozone, UV radiation, and O3/UV treatment
Journal of Water Chemistry and Technology, 2009Co-Authors: V. V. Goncharuk, A. N. Sova, V.f. Vakulenko, Yu. O. Shvadchina, T. N. SitnichenkoAbstract:We have investigated the impact of hydrogen peroxide on the change of the generalized indicators of water quality of the Dnieper River and model solutions of fulvic acids in UV radiation, Ozonization, and O3/UV treatment. We confirmed its involvement in the oxidation process of organic impurities by all studied methods at the pH of the medium more than 7. However, the additions of 1–5 mg/dm3 of hydrogen peroxide inhibited the destruction of fulvic acid in a weakly acidic medium (pH 6.3) and reduced the mineralization degree of water impurities of the Dnieper River during O3/UV treatment and do note accelerate discoloration of the samples under investigation at the studied parameters of Ozonization and O3/UV treatment.
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Formation and decomposition of hydrogen peroxide during UV-radiation, Ozonization, and O_3/UV treatment of river water
Journal of Water Chemistry and Technology, 2008Co-Authors: V. V. Goncharuk, A. N. Sova, V.f. Vakulenko, T. N. Sitnichenko, Yu. O. Shvadchina, I. E. KalinichenkoAbstract:We have studied the kinetics of the formation of hydrogen peroxide during UV-radiation, Ozonization, and O_3/UV treatment of water of the Dnieper River and model solutions of fulvic acids. We have also investigated decomposition of added hydrogen peroxide at the indicated methods of treating river and model waters and the impact of H_2O_2 on the concentration of dissolved ozone.
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formation and decomposition of hydrogen peroxide during uv radiation Ozonization and o3 uv treatment of river water
Journal of Water Chemistry and Technology, 2008Co-Authors: V. V. Goncharuk, A. N. Sova, V.f. Vakulenko, T. N. Sitnichenko, Yu. O. Shvadchina, I. E. KalinichenkoAbstract:We have studied the kinetics of the formation of hydrogen peroxide during UV-radiation, Ozonization, and O3/UV treatment of water of the Dnieper River and model solutions of fulvic acids. We have also investigated decomposition of added hydrogen peroxide at the indicated methods of treating river and model waters and the impact of H2O2 on the concentration of dissolved ozone.
A. N. Sova - One of the best experts on this subject based on the ideXlab platform.
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Photocatalytic destruction of anionic SAS by ozone and oxygen
Journal of Water Chemistry and Technology, 2013Co-Authors: Yu. O. Shvadchina, A. N. Sova, V.f. Vakulenko, V. V. GoncharukAbstract:The article has investigated photocatalytic destruction of anionic SAS—sodium alkylbenzene sulfate (ABS) in the aqueous medium by ozone on TiO_2 Degussa P-25 at UV radiation by a DB-15 low-pressure mercury-quartz lamp. The paper has determined the parameters of photocatalytic Ozonization securing complete ABS destruction (100% in terms of organic carbon). We have assessed advantages of photocatalytic Ozonization of ABS solutions compared with photocatalytic oxidation by oxygen and O_3/UV treatment.
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Photocatalytic destruction of fulvic acids by ozone and oxygen
Journal of Water Chemistry and Technology, 2013Co-Authors: V. V. Goncharuk, V.f. Vakulenko, T. N. Sitnichenko, Yu. O. Shvadchina, A. N. SovaAbstract:We have studied destruction of river fulvic acids in water environment with ozone and oxygen. We have also determined advantages of catalytic and photocatalytic Ozonization of their solutions compared with Ozonization and O_3/UV treatment. Photocatalytic Ozonization secures the highest degree of destruction of fulvic acids (93% in terms of total organic carbon) at a shorter time and specific consumption of ozone compare with other methods of oxidation.
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Impact of hydrogen peroxide on the destruction degree of fulvic acids and organic impurities of river water by ozone, UV radiation, and O3/UV treatment
Journal of Water Chemistry and Technology, 2009Co-Authors: V. V. Goncharuk, A. N. Sova, V.f. Vakulenko, Yu. O. Shvadchina, T. N. SitnichenkoAbstract:We have investigated the impact of hydrogen peroxide on the change of the generalized indicators of water quality of the Dnieper River and model solutions of fulvic acids in UV radiation, Ozonization, and O3/UV treatment. We confirmed its involvement in the oxidation process of organic impurities by all studied methods at the pH of the medium more than 7. However, the additions of 1–5 mg/dm3 of hydrogen peroxide inhibited the destruction of fulvic acid in a weakly acidic medium (pH 6.3) and reduced the mineralization degree of water impurities of the Dnieper River during O3/UV treatment and do note accelerate discoloration of the samples under investigation at the studied parameters of Ozonization and O3/UV treatment.
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Formation and decomposition of hydrogen peroxide during UV-radiation, Ozonization, and O_3/UV treatment of river water
Journal of Water Chemistry and Technology, 2008Co-Authors: V. V. Goncharuk, A. N. Sova, V.f. Vakulenko, T. N. Sitnichenko, Yu. O. Shvadchina, I. E. KalinichenkoAbstract:We have studied the kinetics of the formation of hydrogen peroxide during UV-radiation, Ozonization, and O_3/UV treatment of water of the Dnieper River and model solutions of fulvic acids. We have also investigated decomposition of added hydrogen peroxide at the indicated methods of treating river and model waters and the impact of H_2O_2 on the concentration of dissolved ozone.
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formation and decomposition of hydrogen peroxide during uv radiation Ozonization and o3 uv treatment of river water
Journal of Water Chemistry and Technology, 2008Co-Authors: V. V. Goncharuk, A. N. Sova, V.f. Vakulenko, T. N. Sitnichenko, Yu. O. Shvadchina, I. E. KalinichenkoAbstract:We have studied the kinetics of the formation of hydrogen peroxide during UV-radiation, Ozonization, and O3/UV treatment of water of the Dnieper River and model solutions of fulvic acids. We have also investigated decomposition of added hydrogen peroxide at the indicated methods of treating river and model waters and the impact of H2O2 on the concentration of dissolved ozone.
Qianer Zhang - One of the best experts on this subject based on the ideXlab platform.
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Can the sidewalls of single-wall carbon nanotubes be ozonized?
The Journal of Physical Chemistry B, 2002Co-Authors: Liling Zhang, Nanqin Wang, Qianer ZhangAbstract:Ozonization of the sidewalls of single-wall carbon nanotubes (SWNT) has been investigated by means of 2-layered ONIOM(B3LYP/6-31G*:AM1) calculations. The theoretical calculations reveal that the 1,...
