Journal of Coal Chemistry最新文献

{"title":"INVESTIGATION OF SUSPENDED SOLIDS IN WATER FOR COKE EXTINCTION","authors":"O. Borisenko, О.S. Malysh, M. I. Bliznyukova, Ye.N. Popov","doi":"10.31081/1681-309x-2021-0-6-17-22","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-6-17-22","url":null,"abstract":"The article is devoted to the results of work for the study of the composition and quantitative content of suspended solids (SS) in the wastewater of coke plants before and after biochemical purification plants (BPP), as well as in other waters involved in the process of coke extinction. The characteristic indicators have been investigated of waters before and after BPP of five coke-chemical enterprises of Ukraine, as well as the chemical composition of suspended solids in water after BPP, etc. It is shown that SS in water after BPP is represented mainly by activated sludge, which is partially oxidized to CO2 when water is supplied to hot coke. The rest activated sludge is returned with water condensate to the settling tank of the extinction tower and, thus, is not emitted into the atmosphere in the form of SS. In addition to sludge, the particles of coke, coal and products of the equipment corrosion are present in the purified water after the BPP and in the water of the extinction tower settling tank. The possibility of the presence of concrete particles is also not excluded. To establish the nature of solid particles, their elemental composition and ash composition has been determined. In particular, it was found that the ash composition of suspended solids from water after BPP quantitatively differs from the both of ash composition of coal concentrates and the composition of concrete. For example, the mass fraction of silicon dioxide in the suspended solids of water after BTH is much lower than in concrete and in ash of coal concentrates. The detected predominance of iron (III) oxide in the composition of SS ash after BPP is explained by the presence in the selected samples of products of the equipment corrosion. Based on our research, it is proposed to make changes in the normative document \"Technological standards of permissible emissions of pollutants from coke ovens\", namely in chapter IV \"Operating conditions of coke ovens\" par. 8: to exclude such a normative value as the content of suspended solids in water after BPP, which is submitted for coke extinction. Keywords: water for coke extinction, water after biochemical purification, suspended solids (SS), content, chemical composition, elemental composition, ash composition. Corresponding author A.L. Borisenko, e-mail: zd@ukhin.org.ua","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130805629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE OBTAINING AND STUDYING OF THE COMPOSITION OF CAR TIRE BASED LIQUID PYROLYSIS PRODUCTS","authors":"Pyshiev S. V., Lipko Yu. V., Shlyakhova A. O., Korchak B. A.","doi":"10.31081/1681-309x-2022-0-1-21-28","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-1-21-28","url":null,"abstract":"The actual problem of the accumulation of used car tires in the environment has been considered and rational ways of its solving have been proposed. The \"traditional\" (thermal) method has been considered, the essence of which lies in the following technological operations: theextraction of metal parts from the tires, the grinding of the obtaining rubber material and its heating to high temperatures without air access. The result products of the pyrolysis of used car tires are gas, liquid fraction and carbon black. To carry out the process of pyrolysis of used car tires, a basic technological scheme of the process has been proposed, which was implemented on a pilot scale. The main product is liquid pyrolysis products of used car tires, the mass yield of which is about 35 %. In order to search a further rational use of liquid pyrolysis products of used car tires, a number of their physicochemical properties and fractional composition have been analysed, and their hydrocarbon composition has been determined. Comparison of the characteristics of liquid pyrolysis products of used car tires with the requirements of regulatory documents for commercial fuels allowed to assert that these materials cannot be used as a component of boiler fuel. The main reason for this conclusion is the low flash point in the open crucible. After the removing of gasoline fractions from the liquid products of pyrolysis of used car tires (boiling temperature 200 °C), the resulting residue (boiling temperature > 200 °C) met the requirements of DSTU 4058-2001 for fuel oils of grades \"40\" and \"100\". This fact allows to use such a material as a component of boiler fuel. The possibility of using gasoline fractions as components of commercial gasoline is analyzed. The revealed high content of aromatic compounds and a relatively high content of unsaturated hydrocarbons in the composition of the fractions (fr. with a boiling interval of 140–200 °C and fr. with initial boiling point of 140 °C) are unacceptable for gasoline fractions. Establishing effective and simple methods for reducing the content of aromatic and unsaturated compounds without significant reconstruction of the installation will be the goal of further research. Key words: used car tires, pyrolysis, liquid pyrolysis products, chromatography, boiler fuel, gasoline fractions. Corresponding author S. V. Pyshiev, e-mail: gajva@polynet.lviv.ua","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129612285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of rational technological parameters for heating of a coke battery with a stamped charging of coals.","authors":"V. Goncharov, I. I. Sikan, Ya.I. Dyachuk, N. V. Mukina, I. Shulga","doi":"10.31081/1681-309x-2021-0-3-20-29","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-3-20-29","url":null,"abstract":"DEVELOPMENT OF RATIONAL TECHNOLOGICAL PARAMETERS FOR HEATING OF A COKE BATTERY WITH A STAMPED CHARGING OF COALS © V.I. Goncharov, I.I. Sikan, Ya.I. Dyachuk, N.V. Mukina (Coke production of PJSC «ArcelorMittal Kryvyi Rih», 50095, Dnipropetrovsk region, Kryvyi Rih, Kryvorizhstal str., 1, Ukraine), I.V. Shulga, PhD in technical sciences (State Enterprise \"Ukrainian State Research Coal Chemical Institute (UHIN)\", 61023, Kharkov, Vesnina st., 7, Ukraine) The article is devoted to the introduction at the PJSC «ArcelorMittal Kryvyi Rih» coke plant of a promising technology for compaction of a coal charge, which allows obtaining blast furnace coke of high mechanical and \"hot\" strength from charges characterized by an increased content of lean components of various stages of metamorphism. Under the present circumstances, this is of great importance for increasing the economic indicators of the production of blast furnace coke and the operation of blast furnaces. The start-up of coke oven battery No. 6, designed for the application of this technology, necessitated the determination of rational technological parameters of heating: the temperature level in the control verticals and the location of the burners for supplying coke oven gas in the vertical along the heating wall. The article presents the calculations, the results of which confirm the expediency of rationalizing the actual starting (design) distribution of burners on coke oven battery No. 6. First of all, attention is drawn to the insufficient diameters of the holes in the burners for the extreme and pre-extreme verticals. This, according to the authors, caused underheating of the head zones and resin spills, which were observed during start-up operations on the battery. The replacement of burners at the edges of the walls by large diameters, carried out by the personnel of the coke shop of the coke plant PJSC “ArcelorMittal Kryvyi Rih” and LLC “Koksokhimstanciya”, combined with the full opening of the recirculation windows in these zones, improved the heating of the charge and significantly reduced the intensity of spills. The experience gained was taken into account when locating the control devices at coke oven battery No. 5, which was put into operation later. The article also formulates recommendations for adjusting the temperature regime of coking, depending on the grade and component composition, as well as the technological properties of coal charges. Keywords: coke oven battery, stumping of coal charge, temperature in control verticals, location of burners along the length of the heating wall. Corresponding author Ya.I. Dyachuk, е-mail: Yaroslav.Dyachuk@arcelormittal.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116834406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The analysis of the production volume and coke quality of Ukrainian coke-chemical enterprises in 2020.","authors":"Kravchenko S.A., Starovoit A.G., Turkina O.V., Chaplianko S.V.","doi":"10.31081/1681-309x-2022-0-4-16-21","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-4-16-21","url":null,"abstract":"THE ANALYSIS OF THE PRODUCTION VOLUME AND COKE QUALITY OF UKRAINIAN COKECHEMICAL ENTERPRISES IN 2020 © S.A. Kravchenko, PhD in Technical Sciences (STATE ENTERPRISE \"STATE INSTITUTE FOR DESIGNING ENTERPRISES OF COKE OVEN AND BY-PRODUCT PLANTS'' (SE \"GIPROKOKS'')\", 60 Sumska str., Kharkiv, 61002, Ukraine), A.G. Starovoit, Doctor of Technical Sciences (UKRAINIAN SCIENTIFIC AND INDUSTRIAL ASSOCIATION “UKRKOKS”), 1 Geroev Maidana sq., Dnipro, 49000, Ukraine), O.V. Turkina, S.V. Chaplianko, PhD in Technical Sciences (SE \"GIPROKOKS\") The analysis of the production volume and coke quality in 2020 of 8 Ukrainian coke-chemical enterprises as well as industries located in the controlled territory of Ukraine has been carried out. It is shown that the amount of imported coal for the needs of coking industries amounted to 73.5 %, and the share of domestic coal in the raw material base increased by 3.1 % compared to 2019. The quality of the coal charge at these enterprises was inferior to the quality of the charge of the world's leading coke producers in terms of the yield of volatile substances by 12 % (relative percentages) and compared to 2019 by 1.3 %. The production of 6 % moisture gross coke amounted to 9707.0 thousand tons, which is 3.2 % less than in 2019. Due to a decrease in the production of the main type of product and a change in the composition of the charge, the volume of production of by-products was changed (the volume of coke oven gas was reduced by 2.0 %, by 0.6 % - coal tar, by 11.2 % - benzene, by 16.4 % - sulfuric acid and increased by 0.6 % the volume of production of ammonium sulfate and by 0.7 % - industrial gas sulfur). The overall quality of Ukrainian-made coke fully meets the requirements of the relevant technical specifications and the best world analogues. A study to determine the share of coke of domestic producers in the total volume of coke supplied to Ukrainian metallurgical enterprises found that in the period 2017-2021, the difference between manufactured (including exports) and supplied (including imports) coke was 14.7 - 16.7 %, and the share of imports corresponded to 2.4 - 9.7 %. Due to the armed aggression of the Russian Federation against Ukraine that broke out on February 24, 2022, it is necessary to conduct a survey of all coke-chemical facilities in the country. The relevance and practical significance of such surveys also lies in the need to assess the damage suffered by Ukraine due to the armed aggression. Considering the destruction of PJSC \"MK\" AZOVSTAL \"and PJSC \"AKHZ\" as a result of shelling, the issue of the ability of domestic enterprises to manufacture products becomes very relevant. Keywords: analysis, coke production, coal charge, coke quality. Corresponding author S.V. Chaplyanka, e-mail: chaplianko_sv@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133807273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of 1,3-diphenyltriazene as an anti-detonation additive to motor gasoline’s.","authors":"Trotsenko A. V., Grigorov A. B.","doi":"10.31081/1681-309x-2022-0-2-21-28","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-2-21-28","url":null,"abstract":"The article presents an overview of the chemical principle of anti-detonation additives, which are now widely used in gasolines. The most probable reactions that occur with hydrocarbons in the fuel-air mixture when it enters the combustion chamber of an internal combustion engine are considered. These reactions are mainly represented by cracking with the formation of active radicals, which in turn enter into the oxidation reaction with oxygen. Formed in this way, hydroperoxides take part in chain oxidation reactions, which contributes to the effect of detonation combustion of the fuel-air mixture. In view of this reaction, it is proposed to use 1,3-diphenyltriazene, which belongs to the class of diazocompounds, as an anti-detonation additive for motor gasolines. The principle of anti-detonation effect of this substance is, first of all, the possibility of its thermal decomposition in the temperature range 130-160 °C. In this case, nitrogen, phenyl and aniline radicals will be formed. The phenyl radical, which is one of the most unstable particles, due to its increased reactivity reacts instantly with the most active fuel radicals: atomic hydrogen; methyl and hydroxyl radicals. At the same time, there is a high probability of formation of molecular hydrogen, toluene and phenol among the products of such interactions. These are stable compounds that are not able to continue and maintain the chain oxidation reactions that occur during the combustion of the fuel-air mixture in the combustion chamber of the engine. Thus, in the reaction zone with the direct participation of phenyl radicals there is a decrease in the concentration of radicals initiating chain oxidative reactions, which leads to chain breakage. Also, a very positive aspect of the use of 1,3-diphenyltriazene is that it can be used in compositions with alcohols or with methyl tert-butyl ether in straight-run gasoline fractions of oil, their mixtures with the fractions of the catalytic cracking and of the riforming. The using of the proposed additive in the composition of gasoline fully meets the requirements of the environmental safety standard Euro-5. Key words: gasoline, detonation resistance, additives, 1,3-diphenyltriazene, cracking, oxidation, radicals, internal combustion engine Corresponding author A. B. Grigorov, e-mail:grigorovandrey@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116239107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MEASUREMENT OF THE CONTENT OF MONOETHANOLAMINE DURING THE CONTROL OF THE TECHNOLOGICAL PROCESS OF DESULFURIZATION AND IN THE ENVIRONMENTAL OBJECTS","authors":"A. Martynova, A. Larina, V. A. Saraeva","doi":"10.31081/1681-309X-2021-0-1-28-36","DOIUrl":"https://doi.org/10.31081/1681-309X-2021-0-1-28-36","url":null,"abstract":"The problem of cleaning coke oven gas from sulfur compounds, despite their recent decrease in the raw material base of coking, remains relevant in connection with the requirements to reduce sulfur dioxide emissions into the atmosphere. When using monoethanolamine for the purification of coke oven gas from sulfur compounds, production workers are faced with the problems of determining the exact concentration both in solutions and in coke oven gas and in environmental objects. The article provides an overview of the currently existing methods for the quantitative determination of the content of monoethanolamine in liquid and gaseous media. The results of studies of the possibility of their use in the conditions of by-product coke production are presented, directions of improvement of the known methods are determined in order to eliminate the influence of accompanying components inherent in by-product coke production (in particular, ammonia, amines, phenols, etc.), which distort the analysis results. The authors describe the methods of increasing the selectivity of analytical methods for determining the content of monoethanolamine in: – coke oven gas - based on the absorption of the test substance from coke oven gas by a solution of orthoboric acid, followed by its determination in a solution with pnitrophenyldiazonium; – the air of the working area under the conditions of by-product coke production - it was proposed to eliminate the negative effect of hydrogen sulfide and phenol using an absorber containing a sodium hydroxide solution located in front of the absorber with a hydrochloric acid solution for monoethanolamine (a revised measurement procedure with additions set out in accordance with the requirements of the current legislation in the field of metrology and established metrological characteristics, agreed by the Chief Sanitary Doctor of Ukraine). The directions of research necessary for the development of a method for determining the content of monoethanolamine in process waters of coke-chemical production are outlined. Keywords: desulfurization, monoethanolamine, content determination, selectivity, ammonia, p-nitrophenyldiazonium, coke oven gas, complex compound, color intensity, photometry, measurements. Corresponding author A.Yu. Martynova, e-mail: alla_martynova_aisim@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126080820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of \"water in coal tar\" emulsions stabilized with pulverized coal matter.","authors":"L. Bannikov","doi":"10.31081/1681-309x-2023-0-1-11-17","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-1-11-17","url":null,"abstract":"CHARACTERIZATION OF \"WATER IN COAL TAR\" EMULSIONS STABILIZED WITH PULVERIZED COAL MATTER © L.P. Bannikov, PhD in Technjcal Sciences (State Enterprise \"Ukrainian State Scientific Research Institute of Coal Chemistry (UKHIN), 7 Vesnina str., Kharkiv, 61023, Ukraine) Difficulties in dehydrating coal tar, especially those with a high degree of pyrolysis, are associated with the complex nature of numerous intermolecular interactions that provide high viscosity of the dispersion medium. On the other hand, emulsions are stabilized by dispersed particles insoluble in toluene and quinoline. However, the most distinctive feature is the stabilization of water droplets by the particles of the coke oven carry–over. First of all, the carry–over is related to the chamber loading process as well as the steam and hydro injection used. This leads to the absorption of the smallest dust particles by the condensing tar. The presence of functional groups in the coal substance gives hydrophilicity to the generally hydrophobic conventional coal molecule. In addition, the mineral part of coal also contributes to the diffusivity of the substance, which makes it surface active and capable of stabilizing emulsions. It has been shown that such particles are capable of forming stable multiple emulsions, which, as is known from the experience of oil dehydration, are very stable. The formation of emulsions was carried out on a mechanical stirrer, samples of crushed coking coal were used as emulsifiers, clay and sand were taken as a hydrophilic standard, and industrial soot was used as a hydrophobic standard. The maximum volume of the emulsion was obtained when \"Zh\" coal and \"OS\" coal were used as a powder emulsifier. The minimum volume of the emulsion was formed when hydrophilic components, such as sand and clay, were introduced into the system. The formation of multiple emulsions of the \"tar in water/water in tar\" type was noted. With an increase in the degree of hydrophobicity of powdered emulsifiers, the droplet size decreases, the interfacial surface increases, and the emulsion becomes more stable. The emulsifying ability of powders is explained by the formation of a structural and mechanical barrier. Keywords: coal tar, quinoline-insoluble substances, coal substance, stabilizers, hydrophilicity, hydrophobicity, multiple emulsions. Corresponding author: Bannikov Leonid P., e-mail: ukhinbannikov@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128463430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduction of corrosive activity of operating oil in the benzene department Coke Production of PJSC «ArcelorMittal Kryvyi Rih».","authors":"I. I. Sikan, R. Karenov, N. V. Mukina, S. N. Solonko, L. Bannikov","doi":"10.31081/1681-309x-2021-0-3-29-37","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-3-29-37","url":null,"abstract":"REDUCTION OF CORROSIVE ACTIVITY OF OPERATING OIL IN THE BENZENE DEPARTMENT OF COKE PRODUCTION OF PJSC «ARCELORMITTAL KRYVYI RIH» © I.I. Sikan, R.V. Karenov, N.V. Mukina, S.N. Solonko (Coke production of PJSC «ArcelorMittal Kryvyi Rih», 50095, Dnipropetrovsk region, Kryvyi Rih, Kryvorizhstal str., 1, Ukraine), L.P. Bannikov, PhD in technical sciences (State Enterprise \"Ukrainian State Research Coal Chemical Institute (UHIN)\", 61023, Kharkov, Vesnina st., 7, Ukraine) This paper analyzes and formulates the optimal technological solutions to reduce the corrosiveness of the absorption oil. The problem of reducing the corrosiveness and the ability of the absorbing oil to form the precipitates becomes especially actual in view of the introduction in the technological scheme of a new tube furnace ThyssenKrupp (Germany) for heating the absorption oil in the benzene section. All major work has now been completed at this facility, and soon the new furnace will be commissioned, which should significantly improve the regeneration of the absorption oil. Research of quality indicators of fresh oil and potentiodynamic testing of its water extracts has been fulfilled. To verify that the tube furnace tube material meets the requirements, a spectral analysis of a sample of the damaged tube was performed. The suspended solids of the circulating oil were observed under a microscope at a magnification of ×250. It was revealed that recycled absorption oil can lose quality as a result of tube furnace wear, frequent stoppages for repairs and watering of oil with coke oven gas condensate in scrubbers. Exit from the state of watering occurs during the operation of the distillation department due to \"steaming\" in the column. As a result, the concentration of salts in the oil occurs and, as a result, its corrosiveness increases. Oil watering in the distillation column occurs when the heating temperature drops. Before starting a new tube furnace, it is advisable to renew the entire working volume with fresh oil with preliminary flushing of the equipment. This will make it possible not to water it in the future during the smooth operation of the distillation and to maintain the proper quality of the absorption oil. Keywords: capture of benzene hydrocarbons, absorbing oil, distillation column, regeneration, tubular furnace, corrosiveness, survey, watering, suspended particles, aggregation. Corresponding author I.I. Sikan, е-mail: Ivan.Sikan@arcelormittal.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130657443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"POLIFUNCTIONAL ADDITIVES TO FUEL AND LUBRICANTS","authors":"O. Trotsenko, A. Grigorov, V. Nazarov, O. Zharova","doi":"10.31081/1681-309x-2021-0-6-38-44","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-6-38-44","url":null,"abstract":"The article considers the possibility of increasing the level of operation properties of fuels and lubricants through the use of multifunctional additives. Taking into account the cost of additives, the conditions of their use and the wide range of properties they provide to fuels and lubricants, this path can be considered the most promising in comparison with the purchase of quality crude oil and total re-equipment of existing production. It is proposed to classify polyfunctional additives for fuels and lubricants according to the properties they exhibit and the degree of these properties. Such classification allows to select of a balanced package of additives for fuels and lubricants, to increase their production (on average, the package of additives is about 10 % wt.) and to reduce the cost of the product. In order to control and optimize the circulation of fuels and lubricants and to prevent their falsification (especially in the production of branded grades of the premium class fuels and lubricants), it is proposed to use colorants, which due to their properties can be considered as multifunctional additives / components. Among all the substances on the basis of which industrial colorants of general purpose are produced now, azodyes are the most promising. This is primarily due to the wide range of properties of these substances: antioxidant, biocidal, detergentdispersant, protective, anti-wear. Based on the analysis of information about the use of colorants in fuels and lubricants, to expand the existing range of such additives is possible through the diazocompounds. These substances have a stable color, which, depending on the structure of the compound, ranges from yellow to purple-red. It is shown in the article, that diue to the properties of the class of azocompounds, some of these substances can be considered as promising multifunctional additives in the production of fuels and lubricants. Keywords: fuels and lubricants, additives, multifunctional properties, classification, colorants, azodyes. Corresponding author O.V. Trotsenko, e-mail: trocenko.alexandr@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116873668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE USE OF HUMIC ACIDS FOR MODIFICATION OF BIODEGRADABLE FILMS MANUFACTURED ON THE BASIS OF POLYVINYL ALCOHOL AND HYDROXYPROPYLMETHYL CELLULOSE","authors":"Zhang Siaobin, V. Lebedev, D. Miroshnichenko","doi":"10.31081/1681-309x-2021-0-6-22-37","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-6-22-37","url":null,"abstract":"The article is devoted to the problem of obtaining packaging materials that combine a high level of gas and / or moisture resistance and strength with the ability to quickly decompose without harmful effects on the environment. The purpose of the research described in the article is to study the possibility of making such a material, which, during the period of use, will not only be resistant to the effects of various bacteria, but even prevent their appearance, and upon burial it will be biodegradable. The initial components, namely polyvinyl alcohol, hydroxypropyl methylcellulose, and humic acids of coal origin (as antibacterial additives) were reasonably selected. The modifying effect of humic substances obtained from three different samples of low-grade Ukrainian coal has been studied. In the course of the studies performed, it was found that humic acids of different origins and with different characteristics have a specific effect on the processes of structure formation in solutions of polyvinyl alcohol and hydroxypropyl methylcellulose. In particular, it was shown that in polyvinyl alcohol and methylcellulose solutions with the addition of humic acids that do not contain particles of carbon residues of various degrees of dispersion, an increase in the formation of an ordered structure is observed. Micrographs of solutions of polyvinyl alcohol and hydroxypropyl methylcellulose with humic acids are presented. The peculiarities of the influence of humic substances on the processes of structure formation of solutions of polyvinyl alcohol and hydroxypropyl methylcellulose have been investigated in order to obtain hybrid environmentally friendly biodegradable polymer films. The corresponding experimental-statistical mathematical models have been developed, they describe the dependence of the conditional viscosity and conductivity of polyvinyl alcohol and hydroxypropyl methylcellulose on the content of humic acids, the duration of preparation and one of the characteristics of the raw materials used to obtain humic acids. The corresponding equations are given. Keywords: biodegradable polymer films, coal, humic acids, polyvinyl alcohol, hydroxypropyl methylcellulose, experimental statistical mathematical models Corresponding author Zhang Siaobin, e-mail: shefuqinke1992@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114353827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}