Coke and Chemistry最新文献_第3页

Analysis of Carbon-Based Materials by Raman Spectroscopy

IF 0.4

Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X24600994

M. V. Shishanov, M. S. Luchkin, A. N. Ivanova, A. A. Morozov, A. A. Kachaturyan, E. A. Danilov, A. K. Golubkov

引用次数: 0

Recycling of Coke Oven Gas in Gas Turbines at Ural Steel

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Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X24600970

A. N. Bushuev

引用次数: 0

Requirements on Carbon-Based Reducing Agents for Electrothermal Processes

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Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X24600982

G. A. Ulyeva

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Influence of the Sorption of Iron and Manganese Ions on the Surface Properties of Activated Carbon Derived from Coconuts 铁和锰离子的吸附对椰子活性炭表面特性的影响

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Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X24600957

E. S. Mikhaylova, I. V. Timoshchuk, A. K. Gorelkina, S. A. Semenova

{"title":"Influence of the Sorption of Iron and Manganese Ions on the Surface Properties of Activated Carbon Derived from Coconuts","authors":"E. S. Mikhaylova, I. V. Timoshchuk, A. K. Gorelkina, S. A. Semenova","doi":"10.3103/S1068364X24600957","DOIUrl":"10.3103/S1068364X24600957","url":null,"abstract":"Active carbon proves very efficient in extracting organic and mineral contaminants from aqueous solutions. Sorbents derived from coconut shells are investigated in the present work, both in their initial state and after the sorption of iron and manganese ions from single-component solutions in kinetic, static, and dynamic conditions. The methods employed are infrared (IR) spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, thermal analysis, and nitrogen porosimetry. The absorption of iron and manganese ions from single-component solutions is found to be a purely physical process and does not lead to a strong bond with the coconut-based active carbon. IR spectroscopic data regarding the change in the relative content of oxygen groups at the surface of the sorbents containing iron and manganese ions correlate with the results of X-ray photoelectron spectroscopy (the relative atomic concentration of elements in the surface layers) and the thermogravimetric data (thermal decomposition and mass loss in different temperature ranges). The oxidation rate of the active coal increases after sorption of iron and manganese ions, probably because sorbed ions in the form of organometal complexes within the sorbent structure have a catalytic effect. Analysis of surface images of the samples obtained by scanning electron microscopy and porosimetric data shows that the iron and manganese ions are sorbed in micropores and mesopores. In addition, the sorbed manganese ions probably have a catalytic effect on oxidation of the carbon’s aromatic structure, with surface etching. Results regarding the extraction of iron and manganese ions in kinetic conditions establishes the limiting stage: external mass transfer for 100 min (iron) or 30 min (manganese). In dynamic conditions, the total extraction of iron from single-component solutions is 70.3%, as against 62.7% for manganese.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 10","pages":"573 - 582"},"PeriodicalIF":0.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423477","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}

引用次数: 0

Adaptation of Imported Basic Engineering for Russian Coke Plants

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Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X2460101X

K. V. Pokryshkin, A. V. Uzhanova

引用次数: 0

Optimal Treatment of Coal Mine Wastewater Based on Settling Tanks

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Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X24601008

D. V. Valuev, G. Kh. Sharipzyanova, B. S. Malsagov

{"title":"Optimal Treatment of Coal Mine Wastewater Based on Settling Tanks","authors":"D. V. Valuev, G. Kh. Sharipzyanova, B. S. Malsagov","doi":"10.3103/S1068364X24601008","DOIUrl":"10.3103/S1068364X24601008","url":null,"abstract":"In the present work, processes for wastewater treatment at coal mining enterprises are considered in detail. Such processes are of global importance. The neutralization of soluble and insoluble pollutants in wastewater is investigated; conventional methods are based on the destruction of temporary structures formed by electrical bonds between polarized water molecules, which affect pollutant deposition. Treatment methods for mine wastewater are considered. Calculations of the deposition rate as a function of the combination of treatment parameters are outlined, with graphical interpretation. The deposition rates of coal and rock particles are determined separately, as a function of the relevant parameters. Quantitative relations are established for the reagents used in wastewater treatment. Effective treatment of mine wastewater and other polluted water in settling tanks entails correction of the deposition rates, the size and density of the particles, the static viscosity, the length of the deposition section, the time for the water to pass through that section, and the temperature of the incoming and treated wastewater. The results may be used to optimize the treatment of wastewater in coal mining and other extractive industries.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 10","pages":"615 - 620"},"PeriodicalIF":0.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423218","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}

引用次数: 0

Use of Artificial Intelligence in Improving Coal Processing

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Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X24601021

V. I. Kotelnikov, E. A. Ryazanova

{"title":"Use of Artificial Intelligence in Improving Coal Processing","authors":"V. I. Kotelnikov, E. A. Ryazanova","doi":"10.3103/S1068364X24601021","DOIUrl":"10.3103/S1068364X24601021","url":null,"abstract":"The environmental impact of coal processing is considered. Means of reducing the environmental impact of coal combustion are discussed. Attention focuses on supercritical pyrolysis, whose modification could significantly decrease harmful emissions. An interesting possibility is the use of data augmentation by means of artificial intelligence (AI) to improve a model developed for supercritical pyrolysis on the basis of the Monte Carlo method. That permits modeling and the generation of similar model data. The use of neural networks to control and optimize supercritical pyrolysis is analyzed, especially when the available information is limited. The results of augmentation to expand and improve the initial data set are noted. It must be stressed that the use of neural networks for this purpose requires the selection of the correct approach and adjustment of the models in accordance with the specifics of the problem and the characteristics of the data. It is concluded that, despite significant limitations, neural networks may be an effective tool for optimizing industrial processes. The proposed approaches offer new means of decreasing the environmental impact of coal processing and improving its profitability and may be used in various industrial sectors.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 10","pages":"625 - 628"},"PeriodicalIF":0.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423217","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}

引用次数: 0

Review of Research on Coke Gasification in the Blast Furnace with Elevated Hydrogen Content and Determination of Coke’s Postreactive Strength. 4. Evolution of Coke’s Microstructure on Gasification in the Presence of H2 and H2O

IF 0.4

Coke and Chemistry Pub Date : 2025-02-14 DOI: 10.3103/S1068364X24600969

O. V. Golybev, P. I. Chernousov, S. V. Myasoyedov, A. V. Kramar

{"title":"Review of Research on Coke Gasification in the Blast Furnace with Elevated Hydrogen Content and Determination of Coke’s Postreactive Strength. 4. Evolution of Coke’s Microstructure on Gasification in the Presence of H2 and H2O","authors":"O. V. Golybev, P. I. Chernousov, S. V. Myasoyedov, A. V. Kramar","doi":"10.3103/S1068364X24600969","DOIUrl":"10.3103/S1068364X24600969","url":null,"abstract":"In recent decades, hydrogen-bearing blast additives have been widely used to improve blast furnace smelting. Universities and steelmakers have conducted experiments to study the behavior of metallurgical coke in blast furnaces with an elevated hydrogen content. Although research on the high-temperature reaction of coke with atmospheres containing H2O at different enterprises has employed different experiment designs, some basic conclusions may be drawn. The presence of atmospheric moisture significantly intensifies the gasification of coke, especially in the surface layers. The influence of H2O on gasification becomes pronounced above 1000°C (1273 K). If the porosity of coke after reaction with the atmosphere is studied separately in the external and internal regions, the influence of H2O on the internal region is found to be significantly lower. Higher moisture content of the atmosphere is associated with greater conversion of the coke to graphite in the final sample. Evidently H2O reacts more actively than CO2 with disordered carbon structures. One study demonstrated that the initial coke contains matrices of two types: with lower and higher elastic modulus. The matrix with the higher elastic modulus is mainly consumed on reaction with H2O.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 10","pages":"583 - 590"},"PeriodicalIF":0.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423478","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}

引用次数: 0

Review of Research on Coke Gasification in the Blast Furnace with Elevated Hydrogen Content and Determination of Coke’s Postreactive Strength. 3. Laboratory Research on Reduction and Gasification in the Presence of H2 and H2O

IF 0.4

Coke and Chemistry Pub Date : 2025-02-04 DOI: 10.3103/S1068364X2460088X

O. V. Golybev, P. I. Chernousov, S. V. Myasoyedov, L. I. Lopachevskaya

{"title":"Review of Research on Coke Gasification in the Blast Furnace with Elevated Hydrogen Content and Determination of Coke’s Postreactive Strength. 3. Laboratory Research on Reduction and Gasification in the Presence of H2 and H2O","authors":"O. V. Golybev, P. I. Chernousov, S. V. Myasoyedov, L. I. Lopachevskaya","doi":"10.3103/S1068364X2460088X","DOIUrl":"10.3103/S1068364X2460088X","url":null,"abstract":"The use of hydrogen-bearing blast additives significantly decreases coke consumption in the blast furnace. That entails better understanding of the chemical processes in the furnace. Research on the reaction of coke with atmospheres containing H2 and H2O has developed in the last few decades. Researchers at various universities and steelmakers have studied experimentally the behavior of metallurgical coke in the blast furnace with elevated hydrogen levels. In terms of the experimental conditions, two types of research may be distinguished: study of coke gasification in a specified atmosphere; and study of coke gasification along with the reduction of iron ore when the gaseous reduction products participate in gasification (the coupling reaction). For better understanding of how H2O reacts with the carbon in coke and assessment of how this process affects coke strength, the evolution of coke’s microstructure and physical properties must be investigated. The results of these studies will be presented in full in a future article.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 9","pages":"533 - 539"},"PeriodicalIF":0.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107969","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}

引用次数: 0

X-ray Phase Analysis of Carbonized Kaa-Khem Coal

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Coke and Chemistry Pub Date : 2025-02-04 DOI: 10.3103/S1068364X24600866

G. R. Mongush, K. K. Chuldum, A. N. Popova, Yu. F. Patrakov

引用次数: 0