Journal of Coal Chemistry最新文献

{"title":"Evaluation of the polarity of coal tar emulsion stabilizers","authors":"Bannikov L.P.","doi":"10.31081/1681-309x-2022-0-5-15-25","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-5-15-25","url":null,"abstract":"Surface properties of emulsion stabilizers based on coal tar are determined by their polarity. Particles of coal matter and solid dispersed substances insoluble in quinoline are considered as stabilizers of emulsions of \"water in tar\" type. Polarity significantly affects the physicochemical properties of tars, to take into account the degree of hydrophobicity of coal tar, information about the dipole moment of the conditional molecules is necessary. In addition, the value of the dipole moment of coal particles that stabilize the emulsion \"water in tar\" is of interest. The existing methods for calculating the dipole moment of coal take into account the degree of carbonization of the substance, which does not allow to trace the contribution of the degree of metamorphism and the presence of heteroatoms separately. By regression processing of the data array of dipole moment values of individual aromatic compounds, the dependence on the elemental composition was obtained. The obtained dependence in character and absolute values well characterizes the correlation of the dipole moment of coal with the degree of carbonization. The obtained data make it possible to classify substances insoluble in quinoline as a dispersed component of coal tar with the highest polarity. The greatest surface activity is possessed by those substances that have polar and non-polar groups. Such substances have surface-active properties and act as stabilizers of emulsions \"water in tar\". Experimentally established a closer exponential relationship between the humidity of the tar and the content of substances insoluble in quinoline. An important role in the stabilization of water particles in the emulsion is played by the concentration of quinoline-insoluble substances in the tar. Its increase may be accompanied by aggregation of quinoline-insoluble particles. Together with the increased viscosity of the dispersion medium, coal tar with a high degree of pyrolysis is quite resistant to separation. Keywords: dipole moment, polarity, regression equation, quinoline insoluble substances, highly pyrolyzed tar. Corresponding author Bannikov Leonid P., e-mail: ukhinbannikov@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"33 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":"133381234","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":"Influence of the pyrolysis temperature and pressure on the properties of biochar.","authors":"Kovalchuk V.V., Malik I.K.","doi":"10.31081/1681-309x-2022-0-5-4-15","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-5-4-15","url":null,"abstract":"The aim of this work was to compare the yield, approximate composition, structure and surface morphology of biochar obtained from coniferous cones (SCP) at 400–700 ℃ at different pyrolysis pressures in the range of 0.1–2.0 MPa. The main product of pyrolysis, biochar, has a number of advantages, namely, high calorific value, good thermal efficiency, high biodegradability, a large number of surface functional groups, and the possibility of convenient transportation and storage compared to untreated biomass. However, changes in the composition and structure of biochar obtained from lignocellulosic biomass during pyrolysis under different conditions, as well as the relationship between these properties and the content of the three main components, have not been studied in detail yet. In particular, the ash content, high calorific value (Q), content of functional groups and the mechanism of adsorption of the obtained biochar need further study in order to develop the basis for predicting the possibility of various applications of this product produced from different raw materials. In this work, conifer cones were separately pyrolyzed in a fixed bed reactor under various conditions to further study the effect of biomass components and reaction conditions on biochar yield and properties. The combustion behavior and adsorptive capacity of biochar obtained from SHCP made at various temperatures and pressures was also investigated. The results obtained show that increasing the pyrolysis temperature improves the highest calorific value of the biochar, and increasing the pyrolysis pressure improves the yield of the biochar and increases the amount of surface functional groups and combustion characteristics. For experiments to determine the adsorption capacity of biochar, Pb2+ was chosen due to its inability to biodegrade and high toxicity. The kinetic data for Pb2+ adsorption best fit a pseudo second order model indicating a chemisorption-controlled process. The maximum adsorption capacity for Pb2+ is 235.9 mg/g. Keywords: biochar, interaction of components, pyrolysis conditions, combustion, adsorption of heavy metals. Corresponding author Valentin Valerievich Koval, e-mail: kovalen79@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"21 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":"123409435","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":"OPERATIONAL CONTROL OF THE PROCESS OF PRIMARY PROCESSING OF HYDROCARBONS","authors":"Nabil Abdel Sater, Grigorov A. B.","doi":"10.31081/1681-309x-2022-0-1-15-21","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-1-15-21","url":null,"abstract":"The article considers the ways to solve the problem that arises during the primary processing of hydrocarbon (oil, gas condensate, etc.) raw materials and in the technical literature is called: \"the fraction superposition effect\". This problem is related to the use of technological equipment, including distillation columns, and can be solved by operational control and regulation of technological parameters (temperature, pressure, amount of fusion, etc.) of the process of separation of hydrocarbons into fractions. Operational control of the raw material division into fractions should be based on a system that includes a unit of operational control of technological parameters (quality indicators of distillate fractions) and a correction unit that allows immediate adjustment of parameters to the required level to ensure a certain quality of products. Primary information on the qualitative characteristics of the obtained fractions, in particular the content of impurities (X, %) of lower-boiling components of another fraction, should come from sensors located on the pipelines of the main material flows coming from the distillation column. As controllable indicators for determining (X, %), it has been proposed to use the indicator of relative permittivity – a measure of electrical properties of both raw materials and obtained fractions, supplemented by values of physicochemical parameters such as density and kinematic viscosity. It has been experimentally established that the increasing of the content of impurities in the studied fractions of adjacent fractions with lower boiling points leads to a decrease in the values of all mentioned indicators. Based on these data, a multiple regression equations were obtained, which adequately (R2 = 0.9847 ÷ 0.9969) with an error of 0.5-1.3 % can determine the values of X in adjacent fractions. The obtained equations, in turn, allow to quickly determine the effect of the imposition of compatible fractions, which can be used in the implementation of the system of operational control of the rectification process at the hydrocarbons primary processing plants. Keywords: hydrocarbon raw materials, rectification, fractions, superposition, low-boiling impurities, operational control, dielectric constant. Corresponding author A. B. Grigorov, e-mail: grigorovandrey@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"27 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":"126925992","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":"ANALYSIS AND PROSPECTS OF SEPARATE ENVIRONMENTAL PROTECTION SYSTEMS AT COAL MINING AND COAL PROCESSING ENTERPRISES OF UKRAINE","authors":"O. Atamanyuk","doi":"10.31081/1681-309x-2021-0-5-15-25","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-5-15-25","url":null,"abstract":"The article describes the organizational regional structure of industrial waste management in modern Ukraine, which will improve the efficiency of industrial waste management systems and industrial energy facilities in Ukraine. The structure of industrial waste management at different system levels, from the national to the level of an industrial enterprise, is described. The data on the recommendations of the World Health Organization on the emissions of toxicants into the air and the data of the State Statistics Service of Ukraine on the content of the main pollutant gases in air emissions from stationary sources of Ukraine from 1990 to 2018 are presented. The scheme of the negative impact on the environment of emissions of pollutants from stationary sources – production facilities of coal mining and coal processing is characterized. Comparative data on the indicators of the volumes of toxic waste generation at the enterprises of European countries and the heavy industry of Ukraine are given. It is shown that the main sources of the impact of coal processing enterprises and coal processing industries on all spheres of the environment are organized and unorganized dust and gas emissions, discharges of process wastewater and effluents from the surface and from the volumes of dumps and sludge collectors of coal processing plants. As a result of comprehensive research by the authors, a number of coal dumps of concentrating factories in Eastern Ukraine have been studied, migration routes and concentration of rare and heavy metal compounds in the soil near coal dumps have been investigated. Rather stringent standards for the content of hazardous substances in industrial waste require special methods for neutralizing coal sludge before final disposal and / or disposal.of the raw materials used to obtain humic acids. The corresponding equations are given. Keywords: coal sludge, coal preparation plants, coal dumps, sludge collectors, surface runoff, environmental pollution, emissions into the atmosphere, gaseous, liquid and solid toxicants. Corresponding author O.М. Kasimov, e-mail: nto@ukhin.org.ua","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"13 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":"132489453","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":"Sorption properties of natural carbon materials in the separation of surfactants from water solutions","authors":"Yakupova I.V.","doi":"10.31081/1681-309x-2022-0-3-15-23","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-3-15-23","url":null,"abstract":"SORPTION PROPERTIES OF NATURAL CARBON MATERIALS IN THE SEPARATION OF SURFACTANTS FROM WATER SOLUTIONS © I.V. Yakupova, I.M. Kosygina, Phd, A.S. Makarov, Doctor Of Technical Sciences, I.M. Kryuchko (INSTITUTE OF COLOID AND WATER CHEMISTRY NAS OF UKRAINE, Akademika Vernadskogo Blvd., 42, Kyiv, 03142, Ukraine) More than 40 % of the world's electricity production comes from thermal power plants. The main (97.5 %) type of fuel for Ukrainian thermal power plants is coal, which is explained by the cheapness and availability of this raw material. Low efficiency and environmental problems in the use of coal determine the relevance of the search for alternative fuels in Ukraine, and one of the main ones is coal-water fuel – a highly concentrated dispersed system in which a dispersed fraction of coal of any calorific value and a liquid phase consisting of water with plasticizer additives are used as a combustible base and stabilizers. To give stability and the necessary fluidity, a small amount of a surfactant plasticizer is introduced into the suspension. The formation of surfactant adsorption layers on the surface of particles of the dispersed phase is a necessary condition for the formation of the structure of suspensions and its stabilization. The amount of surfactant adsorption, in addition to the physicochemical composition of coal, is largely affected by the nature of the surface and the cellular structure of materials. To study the sorption efficiency of carbon materials, rigid surfactants widely used in the construction industry were used: sodium salt of sulfonated naphthalene formaldehyde (NF), dophene (technical NF), sulfomelamin formaldehyde (SMF), sodium lignosulfonate (LSTNa). The processes of surfactant adsorption on coal of Ukraine with different degrees of metamorphism have been studied. Conclusions are drawn that allow a better understanding of the processes of interaction of surfactants with solid particles of sorbents. It has been established that the sorption properties of surfactants with the use of carbon sorbents decrease in the series LST → dophene → NF → SMF, which is explained by the structure of surfactants. Comparative characterization of the data obtained also allows us to state that the sorption properties with respect to surfactant compounds increase in a number of studied carbon sorbents: lean coal (P) → long-flame gas coal (DG) → anthracite. The similarity of adsorption processes on the surface of coal grade DG and anthracite gives grounds for the assumption that the mechanisms of stabilization of water-coal suspensions by surfactant compounds during the creation of water-coal fuel are similar. Keywords: natural coal, surfactant, adsorption, outer layer, micelles, aggregation. Corresponding author I.M. Kosygina, e-mail: kosygina@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"2 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":"128004983","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":"Joint activities Coke Production of PJSC «ArcelorMittal Kryvyi Rih» and the industry research institute in issues of the standardization.","authors":"V. V. Burdiyan, N. V. Mukina, N. Golik, A. Ablaeva","doi":"10.31081/1681-309x-2021-0-3-44-48","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-3-44-48","url":null,"abstract":"JOINT ACTIVITIES OF COKE PRODUCTION OF PJSC «ARCELORMITTAL KRYVYI RIH» AND THE INDUSTRY RESEARCH INSTITUTE IN ISSUES OF THE STANDARDIZATION © V.V. Burdiyan, N.V. Mukina (Coke Production of PJSC «ArcelorMittal Kryvyi Rih», 50095, Dnipropetrovsk region, Kryvyi Rih, Kryvorizhstal str., 1, Ukraine), N.М. Golik, A.E. Ablaeva (State Enterprise \"Ukrainian State Research Coal Chemical Institute (UHIN)\", 61023, Kharkov, Vesnina st., 7, Ukraine) The article provides the scientific and methodological foundations for the development of regulatory documents for the production of products of a given quality on the example of cooperation between the relevant structural units of the State Enterprise \"UKHIN\" and the Сoke production of PJSC \"ArcelorMittal Kryvyi Rih\" in accordance with the current requirements of the legislative framework of Ukraine. The definition and goals of standardization of by-product coke production has been formulated. The definition of the types of regulatory documents for coke-chemical products, which are being developed and applied in Ukraine at the present time, has been given. A list of technical standards has been presented, developed over the last two years at the request of PJSC \"ArcelorMittal Kryvyi Rih\" to expand the range of products, taking into account the raw material base, features of production facilities and the production process. After carrying out the necessary examinations and approvals, the draft technical standards and changes in them are tested in the regional state enterprise, which forms and ensures the implementation of state policy in the field of technical regulation. After verification, they are transferred to the Main Fund (the holder of which is the State Enterprise \"Ukrmetrteststandard\") for entering into the database \"Technical conditions of Ukraine\". The advantages of being included in this database has been shown, which, although it is voluntary, allows consumers and all interested organizations to make sure that regulatory documents are checked and taken into account that they comply with legal requirements. The article also shows the relevance of the issue of transportation and labeling of dangerous goods for each type of goods produced by the company. The procedure has been described for the classification of goods, which covers the assignment of a product to a specific hazard class, category and packing group. Keywords: standardization, regulatory document, technical committee for standardization, technical conditions, transportation, dangerous goods, safety data sheet, toxicological and hygienic passport.. Corresponding author V.V. Burdiyan, е-mail: Viktoriya.Burdiyan@arcelormittal.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"38 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":"116113301","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":"Alternative fuels based on coke chemistry products.","authors":"O. Borysenko, M.I. Blyznyukova, F.А. Clasin, T.M. Kedun","doi":"10.31081/1681-309x-2023-0-2-14-20","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-2-14-20","url":null,"abstract":"ALTERNATIVE FUELS BASED ON COKE CHEMISTRY PRODUCTS © O.L. Borysenko, PhD in Technіcal Sciences, M.I. Blyznyukova (State Enterprise \"Ukrainian State Scientific Research Institute of Coal Chemistry (UKHIN), 7 Vesnina str., Kharkiv, 61023, Ukraine), F. Clasin (LLC \"A-POWER\", st. Nikopolske Shosse, 2, s.m.t. Radushne, Kryvorizky district, Dnipropetrovsk region, 53081, Ukraine.), T.M. Kedun (National Technical University «Kharkiv Polytechnic Institute», 2 Kyrpychova Str., Kharkiv, 61002, Ukraine) The article examines the types of liquid alternative motor and furnace fuels that are manufactured using products and waste from the coke-chemical, chemical, and petrochemical industries. It is shown that the interest in alternative (renewable) types of fuels in world practice is explained, first of all, by the solution of a number of environmental problems, since these types of fuels make it possible to reduce greenhouse gas emissions, the consumption of petroleum products, and the use of combustible fossils. Mixtures containing 5-15 % alcohol and 85-95% gasoline, as well as oxygenated fuels containing various oxygen-containing substances (alcohols, ethers, aldehydes, etc.) have become widespread as alternative automotive fuels. The most common additive is bioethanol, which is obtained from vegetable raw materials by fermentation. Liquid alternative furnace and boiler fuel is used for burning in power plants, boilers, etc. Such fuels can be made from many secondary petroleum products, waste oils, diesel fuel and non-liquid fuel oil, as well as using combustible liquid non-target by-products, non-liquid products and tarry waste from the coke and chemical industry. The article provides a list of boiler and furnace fuels with an indication of the technical conditions currently in force in Ukraine, and raw materials for their preparation. The principle technological diagram of the method of obtaining a mixed alternative boiler fuel developed by SE \"UKHIN\" is provided. The process includes the following main stages: reception and preparation of raw materials; production of boiler (stove) fuel; quality control; paperwork; packaging and labeling; shipment of the finished product. Key words: motor fuel, furnace fuel, secondary products, waste, mixed fuel, technical conditions, alternative mixed boiler fuel, technological scheme. Corresponding author: Oleksandr Ludvikovich Borysenko, e-mail: zd@ukhin.org.ua","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"46 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":"126757545","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 HUMIDITY OF COALS (REVIEW)","authors":"Meshchanin V. I., Lysenko L. A., M. D. V.","doi":"10.31081/1681-309x-2022-0-1-4-15","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-1-4-15","url":null,"abstract":"The article is devoted to the actual problem of the presence of excessive moisture in coal, which leads to a decrease in its operational properties. The types and properties of moisture in coal have been considered. Mathematical equations and a statistical evaluation of the effect of the maximum moisture content on the quality indicators of coals are given. The relationship between the pore volume and the maximum moisture content in coals of a various degrees of metamorphism has been analyzed. It is shown that safe humidity depends on the grade of coal and on the size class for most coal marks. The effect of moisture on the bulk density of coal concentrates and coal charges has been determined, the changes in moisture during the coal defrosting and preparation for coking have been analyzed, and the effect of moisture on the flowability of coal charges was confirmed. The moisture content in the coal charge significantly affects on the thermal regime of the coke oven battery and on the heat consumption for coking. Moisture also changes the thermal properties of the coal charge during loading: for wet material, the thermal conductivity coefficient is much higher than for the dry material and the water separately. It has been shown that the maximum moisture content depends apon the nature of coal and the degree of its metamorphism, expressed by such indicators as the yield of volatile substances, the reflection of vitrinite, the content of carbon and hydrogen, as well as the calorific capacity. With the transforming of coal from a coarse size class to a fine one, the maximum moisture capacity increases due to an increasing of the specific surface area of coal. The maximum moisture capacity practically does not depend on the coal degree of oxidation and the chemical composition of coal ash. It has been established that the bulk density reaches a maximum for dry coal and decreases to a minimum depending on the size of the pieces at a moisture content of 6-10 %. The classification of coal charges according to moisture index has been developed. An increase of the moisture content in coal leads to a decrease of its grindability and reduces the coal fluidity. An increase of the moisture content of the coal charge leads to an increase of the calorific value of coke oven gas, to the formation of coke of uneven size, to an increase of its porosity and a decrease of mechanical strength, and also leads to a decrease of the service life of coke ovens. Keywords: moisture, coal, coking, preparation scheme, coke oven gas, mathematical equations. Corresponding author D. V. Miroshnichenko, e-mail: dvmir79@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"89 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":"121898019","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":"Determination of the calorific value of plant material and charcoal.","authors":"D. Miroshnichenko, Inshah Malik","doi":"10.31081/1681-309x-2023-0-2-31-48","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-2-31-48","url":null,"abstract":"DETERMINATION OF THE CALORIFIC VALUE OF PLANT MATERIAL AND CHARCOAL © D.V. Miroshnichenko, Doctor of Technical Sciences, I.K. Malik (National Technical University \"Kharkiv Polytechnic Institute\", 61002, Kharkov, Kirpichev str., 2, Ukraine) It has been shown that the calorific value of plant material is related to its elemental composition, in particular the content of carbon, hydrogen and oxygen. Different types of plant material are characterized by different elemental compositions and, therefore, have different calorific values. The purpose of the work presented in this article was to establish the relationship between the data of rapid analysis (moisture, ash content, volatile matter yield, non-volatile carbon content) and elemental (carbon, hydrogen, nitrogen, sulfur, oxygen) composition of various types of plant material and charcoal with the value of their higher heating value, as well as the impact of changes in the indicators of technical and elemental analysis on the value of the higher heating value of the studied samples. For the analysis, we used a unique database containing information on the composition and properties of plant material that can be used for the production of biogas, charcoal and torrefied biomass. A total of 362 samples were analyzed. Mathematical dependencies for predicting the higher calorific value of vegetable raw materials and charcoal based on the carbon and oxygen content and the atomic ratios between carbon and oxygen were developed. A statistical analysis of the relationship between the indicators of technical and elemental analyses, as well as the calorific value of 73 charcoal samples was carried out. The analysis of the studied dependencies has shown that they are generally characterized by satisfactory accuracy, as evidenced by the high values of the correlation and determination coefficients. Based on the data obtained, it can be concluded that the calorific value can be predicted with satisfactory accuracy based on the data on the yield of volatile substances or non-volatile carbon. The coefficient of determination in this case is 0,8002. Key words: vegetable raw materials, biomass, charcoal, elemental composition, quality indicators, calorific value, mathematical dependencies. Corresponding author: Denis Viktorovych Miroshnychenko, e-mail: dvmir79@gmail.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":"131277688","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":"PERSPECTIVES OF THE WORLD STEEL AND COKE MARKETS (on the materials of the international conference \"EuroCoke Summit\", Amsterdam, 2021)","authors":"E. T. Kovalev","doi":"10.31081/1681-309x-2021-0-5-4-12","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-5-4-12","url":null,"abstract":"The article is devoted to the review of the main materials of the international conference Eurocoke-2021, which took place on October 5-6 in Amsterdam, the Netherlands. Despite the fact that the conference is named as European, the representatives of the world's leading firms and research centers from the EU, England, Australia, India, USA, China, Ukraine and other countries took part in its work. The article summarizes the main results and conclusions of the reports and discussions. As the most of speakers noted, that despite the impact of the global recession and the logistical difficulties caused by the COVID-19 pandemic, as well as the China's ban to use Australian coal, a significant change in the global coal market is not expected in the near future. China's trade policy has led mainly to a redistribution of markets for Australian, American, Canadian and Russian coal. Technologies and researches to replace some of the components of the coking coal charge with a cheaper coal grades or carbonaceous materials of plant origin in order to reduce the cost of coke and steel are still relevant. The strict requirements for limiting greenhouse gas emissions are forcing coke and steel producers to modernize the existing traditional production facilities (including using integrated technologies) to reduce emissions and improve the efficiency of the CO2 capturing and utilization. In the world steel production in the next decade, a significant increase in the share of technologies focused on abandoning coke and blast furnace production is hardly possible due to the high cost and duration of the corresponding projects. Keywords: coke production, steel industry, world coking coal market, steel market, trends, recession, logistics, COVID-19, greenhouse gas emissions, decarbonization, direct iron reduction, integrated technologies, stamped charge coking, biomass, catalysis. Corresponding author E.T. Kovalev, e-mail: post@ukhin.org.ua","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"57 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":"125590421","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}