Lignite oxidative desulphurization: notice 3—process technological aspects and application of products

Gunka, Volodymyr; Shved, Mariia; Prysiazhnyi, Yuriy; Pyshyev, Serhiy; Мірошниченко, Д. В.

doi:10.1007/s40789-018-0228-z

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…Currently, in Ukraine, most coking coals have high sulfur content and produce coke with CRI and CSR values averaging 40% according to Larionov et al 8 In addition, many of the coals used for coking are oxidized, which also worsens the CRI and CSR of the blast furnace coke produced. Similar conclusions can be found in Shmeltser et al, 9 Gunka et al, 10 Shved et al 11 and Zelenskii. 12 Therefore, there is a growing interest in modifying coal, which is in a plastic state during coking, in order to improve the coke quality and expand the resource base of coke production in the current shortage of coking coal.…”

Section: Introductionsupporting

confidence: 87%

The Influence of Organic and Inorganic Additives on the Specific Electrical Resistance of Coke

Miroshnichenko,

Borisenko,

Koval

et al. 2024

ChChT

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This study aimed to evaluate the effect of both inorganic (boron carbide nanopowders and silicon carbide (carborundum) and organic lean (petroleum coke) additives on the quality of coke produced in a laboratory furnace, as well as on its electrical properties. Analyzing the results of the quality assessment of the obtained coke, it can be argued that the addition of a fixed amount (0.25-0.5 wt.%) of non-caking nanoadditives allows to regulate the process in the plastic state in order to increase the coke strength. This modification affects the coke quality and has a significant dependence on the grade composition of the coal charge. The use of nanoadditives is especially important for coal charges with poor coking properties. Adding 5% of petroleum coke to the coal charge leads to an increase in the gross coke yield by 1.2-1.3%; a decrease in coke ash content by 0.2-0.3%; an increase in the total sulfur content in coke by 0.15-0.23%; deterioration in both mechanical (P25 − by 0. 1-0.6%; I10 − by 0.1-0.2%) and coke strength after the reaction (CSR - by 0.6-1.0%), coke reactivity (CRI - by 0.2-0.3%), as well as structural strength (SS by 0.3-0.4%), abrasive hardness (AH by 0.7-1.0 mg) and specific electrical resistance (ρ by 0.002-0.007 Om×cm). The obtained data may indicate an increase in the order degree of the coke structure and the appearance of a larger number of nanostructures. In addition, it should be noted that a sharper deterioration in blast furnace coke quality is observed when using a coal charge characterized by a lower coal content of the Concentrating Factory Svyato-Varvarynska LLC.

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Section: Introductionsupporting

confidence: 87%

The Influence of Organic and Inorganic Additives on the Specific Electrical Resistance of Coke

Miroshnichenko,

Borisenko,

Koval

et al. 2024

ChChT

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“…We are studying the possibility of noncatalytic processes of oxidative desulfurization of straight-run kerosene and diesel fractions with a high sulfur content, as well as hydrogenates due to their air treatment without the use of expensive catalysts and strong oxidizers. This study is based on processes that proved the possibility of relatively selective oxidation of sulfur of organic combustible minerals (coal) without the use of catalysts and in the presence of H 2 O. − Previously, there were studies on the main process conditions, , prospects for JF industrial production, and DF components with good lubricating properties . The proposed technology can also be used for refining oil fuels or regeneration of spent mineral motor oils produced on a small scale, especially when hydrotreating is uneconomical or technologically impossible.…”

Section: Introductionmentioning

confidence: 99%

Influence of Water on Noncatalytic Oxidative Desulfurization of High-Sulfur Straight-Run Oil Fractions

et al. 2022

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The noncatalytic oxidative desulfurization process of straight-run kerosene and diesel fractions with high sulfur contents due to their treatment with air without using expensive catalysts and strong oxidants is considered. The research was carried out in a periodic mode in a bubble-type reactor with a volume of 1 × 10 –3 m 3 under the following conditions: 180–200 °C; 2.5–3.0 MPa; the process lasted for 20–30 min; the air/raw material ratio was 1.6–2.2 m 3 /min per 1 m 3 of raw material. The process can be used to obtain industrial jet fuels and diesel fuel components with good lubricating properties. The possibility and expediency of carrying out the process in the presence of water have been studied. The ratio of water/raw materials (vol.) varied from 0:1 to 2:1. It was proven that the water presence in the reaction medium has a positive effect on the studied process and decreases the oxidation intensity of hydrocarbon medium by 2–4 times. This is due to both the slowing of oxidation reactions by water during peroxide decomposition and chain growth and branching and the partial change in chemical oxidation with the formation of phenols and/or tertiary alcohols, which are inhibitors of oxidation reactions. On the other hand, water has almost no effect on the removal degree of sulfur compounds.

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“…The study [2] considered the process of oxidative desulfurization of high-sulfur Ukrainian brown coal, which was performed by treating brown coal with air or air-steam mixture. Fuel without sulfur and resin coal was obtained during the process of decomposition of organic matter brown coal.…”

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confidence: 99%

The use of brown coal in Ukraine to obtain water-soluble sorbents

Sinitsyna¹,

Karnozhitskiy²,

Мірошниченко³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To develop a method of using salts of humic acids obtained from brown coal of Ukraine for sorption of heavy metal ions and their extraction using ultrafiltration membranes. Methodology. Unique laboratory equipment has been developed to determine the sorption capacity of humic substances with a concentration of 0 to 20 mg/l in relation to heavy metal ions (Cu2+, Pb2+, Cd2+, Hg2+, Zn2+, Co2+) with a concentration of 5 mg/l. The results of proximate and ultimate analyzes, as well as infrared and optical emission spectroscopy were used to assess the quality of brown coal, humic substances and the solution of humic substances with heavy metal ions. Findings. Ukrainian brown coal of Oleksandriia geological-industrial district contains a large amount (about 80%) of humic acid, which is the basis for obtaining effective water-soluble sorbents. It is proved that humic substances obtained from brown coal of Ukraine allow binding up to 99% of heavy metal ions in complexes. The most optimal concentration of humic substances in terms of their concentration and selectivity of heavy metal ions extraction is 5 mg/l. Originality. The possibility of practical using of humic substances obtained from brown coal of Ukraine for sorption of heavy metal ions has been proved. As ultrafiltration membranes, UF-20-PAN membranes are used, which are porous polymer films based on polyacrylonitrile with a pore size of 20 m, the working surface area of the membrane is 28.26 10-4 m2. Practical value. The introduction of the developed technology will allow, firstly, restoring the practical use of large deposits of brown coal in Ukraine, and secondly, introducing deep treatment of industrial and wastewater.

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Lignite oxidative desulphurization: notice 3—process technological aspects and application of products

Cited by 6 publications

References 12 publications

The Influence of Organic and Inorganic Additives on the Specific Electrical Resistance of Coke

The Influence of Organic and Inorganic Additives on the Specific Electrical Resistance of Coke

Influence of Water on Noncatalytic Oxidative Desulfurization of High-Sulfur Straight-Run Oil Fractions

The use of brown coal in Ukraine to obtain water-soluble sorbents

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