Journal of Coal Chemistry最新文献

{"title":"EFFECT OF BULK DENSITY OF COAL BLEND ON THE CALORIFIC VALUE OF COKE","authors":"I. Miroshnichenko, D. Miroshnichenko, I. Shulga, Yu. V. Nikolaychuk","doi":"10.31081/1681-309X-2020-0-6-4-12","DOIUrl":"https://doi.org/10.31081/1681-309X-2020-0-6-4-12","url":null,"abstract":"The article is devoted to laboratory studies to determine the influence of the bulk density of a coal blend (in particular, tamped) on the value of the gross calorific value of the coke obtained from it. To making up a model coal blends, coal concentrates has been selected and analyzed from the raw material base of Ukrainian coke enterprises. From the studied coals four variants of coal blends has been formed, characterized by different grades. Experimental coking of coal charges has been carried out in a 5-kg laboratory oven designed by the State Enterprise \"UKHIN\". The bulk coking blend has been moistened to 8 %. The blend for tamping has been moistened to 12 %, tamped into a special matrix to a density of 1.15 t/m3 , and then the tamped coal cake has been placed in a retort for coking. It has been established that the maximum value of the gross calorific value of blast-furnace coke is achieved during coking of coal blends, which are characterized by the following set of quality indicators: R0=0,91–0,94 %; Vdaf = 30,9-31,0 %; C daf = 83,80-83,83 %; Hdaf = 5,01-5,02 %; Od daf = 8,42-8,45 %. It has been shown that an increase in the bulk density of coal blends, characterized by the same set of quality indicators, from 800 to 1150 kg/m3 leads to an increase in the gross calorific value of blastfurnace coke by 0,05-0,12 MJ/kg. Hydrogen bonds are a factor that contributes to the denser packaging of coal grains in the load. For this, the number of water molecules must correspond to the number of polar bonds in carbon macromolecules. With a lack of water, not all polar functional groups present in macromolecules will participate in the formation of new bonds, which will not allow to the coal grains to be packed more tightly. On the contrary, at higher humidity, excess water molecules will take up space in the feed, not participating in the formation of bonds with carbon macromolecules, which will lead to a decrease in the bulk density in terms of dry weight.","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"45 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":"114976551","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 oven fund state analysis of the coke-chemical productions in Ukraine as on the date 01.01.2021.","authors":"Kravchenko S.A., Starovoit A.G., Turkina O.V., Chaplianko S.V.","doi":"10.31081/1681-309x-2022-0-3-23-28","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-3-23-28","url":null,"abstract":"THE OVEN FUND STATE ANALYSIS OF THE COKE-CHEMICAL PRODUCTIONS IN UKRAINE AS ON THE DATE 01.01.2021 © 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 oven fund state analysis has been carried out for coke batteries of eight coke-chemical enterprises and industries located in the controlled territory of Ukraine. As on the date 01.01.2021, the operating coke oven batteries number was about 83,3 % of the total. The average service life of operating batteries was 30 years, and only 33,3 % of operating batteries corresponded to standard service life by project - 20 years. Over the past 10 years, the operating batteries number has decreased by 5 units, and their average service life has increased by 4,4 years, which indicates a deterioration in the oven fund condition. Obtained data on batteries average service life indicate a significant risk of industrial accidents, as well as the need to inspect and assess technical condition of coke oven batteries with a service life more than 20 years with followed reconstruction or a new construction. The ratio of total capacity of operating coke oven batteries (16891 thousand tons/year) to capacity of batteries with a service life of up to 20 years (5100 thousand tons/year) indicates issue relevance of domestic cokechemical enterprises further ability to fully meet the demand of the Ukrainian market for coke. Taking into account the consequences of Russian Federation armed aggression against Ukraine which broke out on 24.02.2022, at present all coke-chemical plants in the country need a thorough inspection. The relevance and practical significance of such surveys also lies in the need to assess the losses caused to Ukrainian industry by armed aggression of the Russian Federation. However, such inspection can only be performed after appropriate access to the concrete industrial objects. The resumption of the coke production is the only way to refuse the import of coke. Key words: analysis, oven fund, coke battery, average service life, total capacity. Corresponding author: S.V. Chaplianko e-mail: chaplianko_sv@ukr.net","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":"128866926","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":"Raw material base for coking of the Coke Production of PJSC \"ARCELORMITTAL KRYVYI RIH\" in the period from 2017 to 2021.","authors":"N. V. Mukina, D. Miroshnichenko","doi":"10.31081/1681-309x-2021-0-4-4-9","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-4-4-9","url":null,"abstract":"RAW MATERIAL BASE FOR COKING OF THE COKING PRODUCTION OF PJSC \"ARCELORMITTAL KRYVYI RIH\" IN THE PERIOD FROM 2017 TO 2021 © N.V. Mukina (Coke-chemical production of PJSC \"ArcelorMittal Kryvyi Rih\", 50095, Dnepropetrovsk region, Kryvyi Rih, Krivorozhstal st., 1, Ukraine), D.V. Miroshnichenko, Doctor of Technical Sciences (NTU \"Kharkiv Polytechnic Institute\", 61002, Kharkiv, st. Kirpicheva, 2, Ukraine) The article presents the data on coal components that were used in the charge for coking coke oven batteries №№1-4 (bulk coal charge) and №№ 5, 6 (tamped coal charge) of the coke-chemical production of PJSC \"ArcelorMittal Kryvyi Rih\" in the period from 2017 to 2021, as well as averaged information on some quality indicators of the produced coke. In general, the coal raw material base of the enterprise for the last five years has been of a stable inter-basin nature with a predominance of coals from the USA, Kazakhstan, and the Russian Federation. It is shown that, as the tamping technology suggests, moisture content, bulk density and content of classes less than 0.16 and less than 3.0 mm in coal charges supplied to the coal waste plant. №№ 5, 6 are significantly higher than the values of similar indicators of coal charges supplied to the numbers 1-4. Along with this, due to the use of coals of a certain quality, ash content, total sulfur content and the thickness of the plastic layer in coal charges supplied to the coal bunker №№ 1-4, is slightly higher than similar indicators of coal charges supplied to the boiler №№ 5, 6. In total, during 2017-2021, the composition and quality indicators of the coal charge for the production of coke at the boiler plant №№ 1-4 practically did not change, while in the coal charge for the production of coke on coke oven batteries №№ 5, 6 there is a decrease in the share of highly volatile coals with a simultaneous increase in the content of medium-volatile and low-volatile components. The given values of the quality indicators of the obtained blast-furnace coke indicate that the use of tamping technology makes it possible to obtain blast-furnace coke of a higher quality than by using a traditional technology. In particular, the coke obtained at the oven batteries №№ 5, 6 are characterized by lower values of ash content, total sulfur content and abrasion (M10) with higher values of mechanical strength in terms of M25 and post-reaction strength (CSR). Keywords: coal, inter-basin raw material base, coking, charge tamping, coke quality. Corresponding author N.V. Mukina, е-mail: Natalia.Mukina@arcelormittal.com","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":"128183516","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":"Coking of rammed coal charges. Gas coal content ≤ 40%.","authors":"Mukina N.V., M. D. V.","doi":"10.31081/1681-309x-2022-0-3-4-15","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-3-4-15","url":null,"abstract":"COKING OF RAMMED COAL CHARGES. GAS COAL CONTENT ≤ 40% © N.V. Mukina (Coke-chemical production of PJSC “ArcelorMittal Kryvyi Rih\", 50095, Kryvyi Rih, Krivorozhstal st., 1, Ukraine), D.V. Miroshnichenko, Doctor of Technical Sciences (National Technical University \"Kharkiv Polytechnic Institute\", 61002, Kharkov, Kirpichev str., 2, Ukraine) The article presents the results of studies of coking coal charges, characterized by the content of coals of the gas group up to 40%. The coal concentrates included in the composition of the coal charge for tamping the coke production of PJSC ``ArcelorMittal Kryvyi Rih\" were studied. The initial samples were studied using a set of standardized methods with the determination of data from technical, petrographic and granulometric analysis, as well as the chemical composition of the ash. In addition, burst pressure values and Hardgrove grindability coefficients were determined in the samples taken. Based on the data obtained, the following indicators were calculated: sintering and coking properties of the charge, the average size of a piece of coal, the ash basicity index, and the basic-acid ratio. The presence of coals in the raw material base of KHP \"ArcelorMittal Kryvyi Rih\" was established, differing both in terms of sieve, technical, petrographic and plastometric analyzes, and in terms of grinding capacity, bursting pressure and chemical composition of the mineral part. It is shown that an increase in the sintering capacity, determined by both plastometric and petrographic methods, and the coking capacity of the charge leads to an improvement in the mechanical strength of blast-furnace coke. Graphic dependencies are built and mathematical equations are developed, they allow predicting the value of the mechanical strength of the coke obtained from them, according to the data of laboratory studies of coal charges. A linear relationship has been established between the CRI and CSR indices of the obtained experimental coke. Mathematical dependencies have been developed and it makes it possible to predict with sufficient accuracy the values of CRI and CSR of laboratory coke according to the data of the basic-acid ratio and basicity index of the ash of the initial coal charge. Keywords: coal, charge, rammer, laboratory tests, coke quality.. Corresponding author D. V. Miroshnichenko, e-mail: dvmir79@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"9 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":"131917837","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 of global metallurgical coke production and forecasts review.","authors":"S. Kravchenko, S. Chaplianko, A.A. Kogtin","doi":"10.31081/1681-309x-2023-0-1-3-7","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-1-3-7","url":null,"abstract":"ANALYSIS OF GLOBAL METALLURGICAL COKE PRODUCTION AND FORECASTS REVIEW © S.A. Kravchenko, PhD in Technical Sciences, S.V. Chaplianko, PhD in Technical Sciences, A.A. Kogtin (STATE ENTERPRISE \"STATE INSTITUTE FOR DESIGNING ENTERPRISES OF COKE OVEN AND BY-PRODUCT PLANTS'' (SE \"GIPROKOKS'')\", 60 Sumska str., Kharkiv, 61002, Ukraine) Taking into account, that met coke production volume is determined by blast furnace production need, and blast furnace production is determined by steelmaking production need, the analysis of the world pig iron and steel production in 2019 - 2021 and for 6 months of 2022 has been done. It has been shown, that in the specified period, the world metallurgical production had fluctuating trends: ±29 million tons (±2,0 %) for iron and ±53 million tons (±2,7%) for steel. Domestic metallurgical production in 2019 – 2021 was characterized by an increase in volume by 1,1 million tons (5,2 %) for iron and a fluctuation of ±0,4 million tons (±1,9 %) for steel, in January - September 2022 took place the impetuous decrease by 6,2 million tons (57,9%) for iron and by 6,3 million tons (58,2 %) for steel, compared to the same period in 2021, which due to the consequences of the armed aggression of the Russian Federation against Ukraine. The world met coke production in 2019 - 2021 had fluctuating trends: approximately ±27 million tons (±3,9 %). Domestic met coke production in 2019 - 2021 was characterized by a decrease in volume by 0,44 million tons (5,2 %), and in January - November 2022 took place the impetuous decrease by 4,3 million tons (58,1 %), compared to the same period in 2021, which one also is related to the consequences of armed aggression. Some the world met coke production forecasts for 2023 – 2030 have been considered. It has been shown, that there is no consensus on the world coke production development. The most negative, among those considered, is the scenario of a decrease the world coke production to 87,7 billion USD at the end of 2028, the most positive – an increase to 264,6 billion USD in 2030. Considering the global steel production forecast from Worldsteel Association, the most probability is a restrained forecast with fluctuating trends in 2023 – 2024 and increase in the future due to urbanization in the Asia-Pacific region. Keywords: pig iron, steel, metallurgical coke, coke-chemical production, analysis, forecast Corresponding author S.V. Chaplianko e-mail: chaplianko_sv@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"111 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":"132928069","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":"Marine fuel with low sulfur content, production prospects in Ukraine.","authors":"Сhernyavsky А.V., Grigorov A.B.","doi":"10.31081/1681-309x-2022-0-6-23-28","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-6-23-28","url":null,"abstract":"The article considers the main global trends in the use of fuel for shipping. The necessity of replacing marine fuel oils of the F-5 and F-12 grades, which are currently widely used by the merchant fleet of Ukraine, with new fuels with a low sulfur content, such as marine gas oil (MGO) or low sulfur marine gas oil (LS-MGO), is substantiated. The main problems are characterized, and in turn, they may arise during the transition of shipping to new types of fuel taking into account the role of cargo transportation by sea. Directions for solving these problems without a significant impact on the cost of cargo transportation are proposed, consisting of the selection of raw materials, their preliminary processing, the use of the latest processing technologies and compounding of finished commercial products. The selection of raw materials consists of determining the types and grades of raw materials that are provided with sufficient industrial reserves for the implementation of the selected technology and are characterized by a certain level of quality, for example, low (<0.5 %) sulfur content. The use of the latest technologies consists of thermal (cracking, pyrolysis) and thermocatalytic (catalytic cracking and pyrolysis, hydrotreating and hydrocracking) processes for obtaining fuel with a low sulfur content from hydrocarbon raw materials. Fuel compounding occurs with components with a significantly lower sulfur content. For this, various petroleum distillates, commercial fuels, some liquid products of coal gasification, as well as products of thermal degradation of polymer raw materials can be used. In practice, in the production of marine fuel with a low sulfur content, the most effective combination of several directions in a single technological chain: \"selection of raw materials - the latest technologies\" or \"selection of raw materials - the latest technologies - compounding\". Considering the above, it is shown that at present one of the most promising technological processes for the production of motor fuels, in particular marine ones, in Ukraine catalytic pyrolysis of secondary polymer raw materials on zeolites can be considered. Key words: marine fuel, sulfur, shipping, environmental requirements, polymers, pyrolysis, catalyst, petroleum distillates, coal gasification products. Corresponding author: A.B. Grigorov, e-mail: grigorovandrey@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"50 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":"128688766","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 central laboratory Coke Production of PJSC «ArcelorMittal Kryvyi Rih» in present-day condition.","authors":"O. P. Chernousova, N. V. Mukina, A. Martynova","doi":"10.31081/1681-309x-2021-0-3-38-44","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-3-38-44","url":null,"abstract":"THE CENTRAL LABORATORY OF COKE PRODUCTION AT PJSC «ARCELORMITTAL KRYVYI RIH» IN PRESENT-DAY CONDITIONS © O.P. Chernousova, N.V. Mukina (Coke Production of PJSC «ArcelorMittal Kryvyi Rih», 50095, Dnipropetrovsk region, Kryvyi Rih, Kryvorizhstal str., 1, Ukraine), A.Yu. Martynova, PhD in Technical Sciences (State Enterprise \"Ukrainian State Research Coal Chemical Institute (UHIN)\", 61023, Kharkov, Vesnina st., 7, Ukraine) The article discusses the scientific and methodological organization of analytical control at the coke production of PJSC \"ArcelorMittal Kryvyi Rih\" (CP AMKR), as well as the results of ongoing scientific and methodological measures to ensure confidence in the results of measurements carried out in the central laboratory (CL CP AMKR). Thus, the CL CP AMKR was one of the first in the industry to put into use the test installation \"KARBOTEST\", which allows without the involvement of third parties to carry out important laboratory research and enables the laboratory staff to quickly develop recommendations for optimizing the composition of coal charges and improving the quality of coke. The unit is designed to test the coking process of coal mixtures and certain grades of coal concentrates under temperature conditions similar to those in coke oven batteries. CL CP AMKR introduces express methods for the analysis of chemical coking products and was one of the first to introduce a refractometric method for determining the mass fraction of distillate up to 180 ° C in crude benzene. The use of this method can significantly reduce the measurement time, avoiding the cumbersome distillation procedure, and reduce the sample volume for analysis from 100 cm3 to a few drops. In order to ensure the uniformity, quality of measurements and tests, the CL on an ongoing basis takes part in interlaboratory comparative tests of almost all types of raw materials and products entering and produced by it. These are the products that are stable over time in terms of their quality indicators, for example, coal coke, as well as products whose individual indicators can change over time (crude benzene, coal tar, etc.). Keywords: measurement, quality control, coal concentrates, coke, chemical products, qualification confirmation, experimental coking, uncertainty, interlaboratory experiment, accreditation. Corresponding author A.P. Chernousova, е-mail: Elena.Chernousova@arcelormittal.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"41 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":"125669386","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":"Elucidation of the nature of the occurrence of calcium and iron compounds in sulfur dioxide after lump sulfur combustion furnaces.","authors":"Semiryazhko E.M., Deineka D.M., K. V.V., Wetzner Yu.I., Panasenko V.A., Fandeeva A.A","doi":"10.31081/1681-309x-2022-0-4-22-28","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-4-22-28","url":null,"abstract":"ELUCIDATION OF THE NATURE OF THE OCCURRENCE OF CALCIUM AND IRON COMPOUNDS IN SULFUR DIOXIDE AFTER LUMP SULFUR COMBUSTION FURNACES © E.M. Semiryazhko (LLC Scientific and Production Enterprise Zarya, 93000, Rubizhne, Lugansk region, Zavodskaya st., 1g/36, Ukraine), D.M. Deineka, PhD in Technical Sciences, V.V. Kazakov, Doctor of Technical Sciences, Yu.I. Wetzner, PhD in Technical Sciences (National Technical University \"Kharkiv Polytechnic Institute\", 61002, Kharkov, Kirpichev str., 2, Ukraine), V.A. Panasenko, Doctor of Technical Sciences (SE \"State Research and Design Institute of Basic Chemistry\", 61002, Mironositskaya St., 25, Kharkov, Ukraine), A.A. Fandeeva (NTU \"KhPI\") It is known that in the operation of the first layer of the vanadium catalyst for the oxidation of SO2 to SO3 in the production of sulfuric acid, the main problem is the rapid increase in the hydraulic resistance of the catalyst due to the ingress of solid impurities in the form of dust from the gas. It has been established that the main component of these impurities are calcium and iron compounds. Therefore, the determination of the main sources of the occurrence of these compounds in sulfuric gas would make it possible to solve the problem of their elimination and improve the performance properties of the catalyst. The chemical composition of the feedstock in the production of sulfuric acid – granulated sulfur – was studied by X-ray fluorescence analysis for the presence of calcium and iron compounds. It was found that the content of calcium and iron in sulfur was 0,015 wt. %, which is not significant for this production. The method of X-ray diffraction analysis was used to study the marl-chamotte, chromium-magnesium bricks of the Slavyansk plant and cement used at LLC NPP “Zarya” as, respectively, the lining of the sulfur combustion furnace and for the installation of the lining. As a result of the research, the presence of calcium carbonate was established, and it can be a source of calcium compounds under the operating conditions of a sulfur combustion furnace. X-ray diffraction studies of spent vanadium catalysts were carried out and it was found that iron precipitates on the catalyst surface in the form of oxide Fe2O3 and forms iron-potassium alum in the form of KFe(SO4) and [K(Fe,Al)SO4]2 salts both on the surface and in depth of the granules. As a result of the research, it was shown that iron oxide Fe2O3 is a corrosion product of the metal part of the combustion furnace equipment and the waste heat boiler. Based on the studies carried out, recommendations are given in the work to reduce the effect of contamination of the layers of vanadium catalysts: storage and preparation of feedstock, process standards. Key words: sulfuric acid, sulfur dioxide oxidation, vanadium catalyst, sulfuric gas, sulfur combustion, sulfur combustion furnace, vanadium catalyst fouling. Corresponding author: Deyneka Dmitry Nikolaevich, e-mail: deynekadn@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"65 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":"125992752","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":"ORGANOSULFUR COMPOUNDS OF COKE OVEN GAS AND THEIR CONTRIBUTION TO EMISSIONS OF SULFUR DIOXIDE FROM THE SMOKESTACKS OF COKE BATTERIES","authors":"A. Martynova, O. S. Malysh, V. A. Saraeva, I. N. Palval","doi":"10.31081/1681-309X-2020-0-6-12-17","DOIUrl":"https://doi.org/10.31081/1681-309X-2020-0-6-12-17","url":null,"abstract":"The article touches upon the problem of cleaning of the coke oven gas from sulfur compounds, which is relevant in connection with the requirements for reducing of the sulfur dioxide emissions into the atmosphere and ensuring of the environmental safety of production in general. At present, the sulfur dioxide emissions from coke-chemical plants account for about 20 % of the total emissions of pollutants from coke ovens and are calculated from the concentration of hydrogen sulfide in coke oven gas after its purification before feeding to coke oven batteries heating systems. However, in addition to hydrogen sulfide, coke oven gas also contains organosulfur compounds such as carbon disulfide (CS2), carbon oxysulfide (COS), thiophene (C4H4S), mercaptans, etc. The authors of the article carried out a study to determine the content of organic sulfur compounds in the original and purified coke oven gas, as well as the contribution of these substances to sulfur dioxide emissions from the smokestacs of coke oven batteries. The calculation has been performed of the additional volume of sulfur dioxide, which is formed due to the combustion of organosulfur compounds of coke oven gas during its combustion in the heating system of coke ovens. It has been found that under the condition of complete conversion of organic sulfur compounds into sulfur dioxide during the combustion of coke oven gas in the heating system of coke ovens, the concentration of sulfur dioxide in flue gases can be approximately 25.0-35.0 mg/m3 (in recount on 5 % oxygen content in flue gases). It has been also shown that the share of emissions of the sulfur dioxide formed as a result of the combustion of hydrogen sulfide in coke oven gas is 90-95 %, and that formed as a result of combustion of the organic sulfur compounds is 5-10 %, even if they are completely transformed into the sulfur dioxide. It has been concluded that it is legitimate to calculate the volume of sulfur dioxide emissions based on the concentration of hydrogen sulfide in purified coke oven gas, supplied as an energy carrier to the heating system of coke ovens.","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"17 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":"117336486","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":"Study of chemical and physical features of lignite derivatives for evaluation of their hybrid functionality potential.","authors":"V. Lebedev, D. Miroshnichenko, D. Savchenko, E.I. Lytvynenko","doi":"10.31081/1681-309x-2023-0-1-7-11","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-1-7-11","url":null,"abstract":"STUDY OF CHEMICAL AND PHYSICAL FEATURES OF LIGNITE DERIVATIVES FOR EVALUATION OF THEIR HYBRID FUNCTIONALITY POTENTIAL © V.V. Lebedev, PhD in technical sciences, D.V. Miroshnichenko, Doctor of Technical Sciences, D.O. Savchenko, E.I. Lytvynenko, PhD in technical sciences (National Technical University «Kharkiv Polytechnic Institute», 2 Kyrpychova Str., Kharkiv, 61002, Ukraine)) The article shows that despite the existence of studies on the modification of various types of polymeric materials with lignite and its derivatives (in particular, it has been proven that the addition of lignite to polymers can affect their biodegradation), there is a further need to study the physicochemical features of the hybrid functionality of these materials in relation to a wide range of materials. The paper analyzes lignite and its derivatives in the form of humic acids in terms of their use for hybrid modification of multifunctional materials. The subject of the study is related to the non-energy and non-fuel use of fossil coal. This area is one of the most promising, as it allows to obtain marketable products of high demand, the cost of which is much higher than the cost of the raw materials. By performing qualitative, quantitative, and spectroscopic analyses of humic acids of different types of lignite, it has been proved that they have a significant hybrid functionality due to the presence of a large number of different functional groups in their composition. It has been shown that the most characteristic functional groups of lignite humic acids include phenolic hydroxyl -OH groups, carboxyl COO-, NH2 deformation groups, aliphatic CO groups, etc. This determines the ability of lignite humic acids to act as hybrid modifiers in relation to a wide range of substances through the following mechanisms: chemical interaction, dipole-dipole interaction in the form of hydrogen bond systems, and configuration changes in the structure of various materials and substances. It has also been found that the high hybrid functionality of lignite humic acids is determined by their polarity, which significantly increases the reactivity of active peripheral groups. Keywords: coal, humic acids, hybrid functionality, modification, properties. Corresponding author Denys V. Miroshnychenko, e-mail: dvmir79@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"220 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":"115064024","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}