Coke and Chemistry最新文献_第2页

Structural-Group Composition and Biological Activity of Humic, Hymatomelanic, Humous, and Fulvic Acids from Lignite 褐煤腐殖酸、膜黑酸、腐殖酸和黄腐酸的结构-基团组成和生物活性

IF 0.6

Coke and Chemistry Pub Date : 2026-08-28 DOI: 10.3103/S1068364X26600429

K. S. Votolin, S. I. Zherebtsov, K. M. Shpakodraev, N. V. Malyshenko

{"title":"Structural-Group Composition and Biological Activity of Humic, Hymatomelanic, Humous, and Fulvic Acids from Lignite","authors":"K. S. Votolin, S. I. Zherebtsov, K. M. Shpakodraev, N. V. Malyshenko","doi":"10.3103/S1068364X26600429","DOIUrl":"10.3103/S1068364X26600429","url":null,"abstract":"Fractions of humic materials, including humic, hymatomelanic, humous, and fulvic acids, are derived from Kansk-Achinsk and South Ural lignite. The yield of humic materials is greatest for naturally oxidized lignite from the Tisul field in the Kansk-Achinsk Basin: 60.9% humic acids (including 11.3% hymatomelanic acids and 49.6% humous acids) and 9.6% fulvic acids). The fractions are studied by means of 13С NMR (CPMAS) spectroscopy, technical analysis, and elemental analysis. Each fraction is found to have a specific elemental composition and also structural-group composition. The biological activity of the fractions is assessed for wheat seeds of the Aphrodite variety. For all the humic materials, the biological activity is relatively high; they may be recommended as growth stimulators for plants. The phytoactivity index of humic acids is found to depend on the structural-group parameters calculated from the 13C NMR (CPMAS) spectroscopic data: the aromatic content fa (R2 = 0.86–0.96) and the aromatic/aliphatic ratio fa/al (R2 = 0.88–0.98). The fulvic acids have the greatest biological activity with respect to the wheat seeds. Their phytoactivity index is relatively high in solutions whose concentration is an order of magnitude lower: the most effective concentration is 0.00025% for fulvic acids and 0.0050% for humic, hymatomelanic, and humous acids.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 5","pages":"261 - 270"},"PeriodicalIF":0.6,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823123","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

Influence of the Iron and Calcium Content of Coking Batch on the Hot Strength of Coke at Severstal 焦化料铁、钙含量对焦炭热强度的影响

IF 0.6

Coke and Chemistry Pub Date : 2026-08-28 DOI: 10.3103/S1068364X26600442

N. S. Cheglakova, E. E. Sokolovskaya, D. R. Izmaylov, E. V. Karunova, O. A. Kalko

引用次数: 0

Polyacrylates in the Coal Industry: Their Antifreeze Action and Potential Application 聚丙烯酸酯在煤炭工业中的防冻作用及其潜在应用

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Coke and Chemistry Pub Date : 2026-08-28 DOI: 10.3103/S1068364X26600454

A. A. Leifrid, A. V. Sidorov, D. A. Reznik, A. E. Reznik, A. V. Chertenkov, V. S. Frolov, A. A. Bobrovnikova

引用次数: 0

Production, Characterization and Application of Mesophase Pitches Based on Residual Hydrocarbon Fractions: A Review of Modern Concepts 基于残余烃馏分的中间相沥青的生产、表征及应用：现代概念综述

IF 0.6

Coke and Chemistry Pub Date : 2026-07-21 DOI: 10.3103/S1068364X26600314

R. R. Gabdulkhakov, P. V. Spasiuk, T. G. Utenkova

{"title":"Production, Characterization and Application of Mesophase Pitches Based on Residual Hydrocarbon Fractions: A Review of Modern Concepts","authors":"R. R. Gabdulkhakov, P. V. Spasiuk, T. G. Utenkova","doi":"10.3103/S1068364X26600314","DOIUrl":"10.3103/S1068364X26600314","url":null,"abstract":"Mesophase pitch is a complex hydrocarbon dispersion system dominated by a liquid-crystalline phase, which forms during the thermolysis of polycyclic aromatic compounds at temperatures above 380°C. The properties of the mesophase vary significantly depending on the composition of the feedstock, the parameters of the pitch production process, and other factors. The mesophase optical texture, its proportion in the pitch determine the performance characteristics of the material, which necessitates reliable differentiation between different types of mesophase. Mesophase pitch is widely used to produce high-tech carbon materials, whereby the requirements for it depends on resulting material. Systematic approaches to differentiating types of mesophase pitch based on their properties remain insufficiently developed. In this regard, this study proposes a comprehensive methodological approach aimed at identifying and differentiating various types of mesophase, establishing a relationship between feedstock composition, the mechanism of mesophase formation, and the properties of pitches. The role of different classes of compounds in the feedstock and their influence on the mesophase formation mechanism are evaluated, which in the long term enables the adaptation of various feedstock types for producing pitches with different intended uses. The optimal feedstock composition for producing mesophase pitch is determined, and quantitative and qualitative evaluation criteria are developed to enable the differentiation of mesophase pitches by their fields of practical application. Requirements for mesophase pitch depending on the target product are compiled and systematized. This form a scientific foundation for characterizing mesophase pitches as an intermediate stage in the production of carbon materials from hydrocarbon residues.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 4","pages":"229 - 260"},"PeriodicalIF":0.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148519520","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

Charge Storage in Activated Sapropelic Coal with KOH and H2SO4 Electrolytes KOH和H2SO4电解质活化腐泥煤的电荷储存

IF 0.6

Coke and Chemistry Pub Date : 2026-07-21 DOI: 10.3103/S1068364X2660034X

N. S. Zakharov, G. Yu. Simenyuk, T. S. Nechaeva, T. O. Sergina, V. I. Krasheninin

{"title":"Charge Storage in Activated Sapropelic Coal with KOH and H2SO4 Electrolytes","authors":"N. S. Zakharov, G. Yu. Simenyuk, T. S. Nechaeva, T. O. Sergina, V. I. Krasheninin","doi":"10.3103/S1068364X2660034X","DOIUrl":"10.3103/S1068364X2660034X","url":null,"abstract":"The electrochemical characteristics and charge storage mechanisms of activated sapropelic coal in alkaline (6 M KOH) and acidic (4 M H2SO4) electrolytes are compared. The type of electrolyte determines the dominant energy storage mechanism, as established by cyclic voltammetry, galvanostatic charging and discharging (at a current density of 35.7 mA/cm2), and electrochemical impedance spectroscopy. The maximum unit capacitance (164.8 F/g) and energy (5.72 W h/kg) are recorded in sulfuric acid; that may be attributed to synergy between the capacitance of the double electric layer and the contribution of the fast pseudocapacitance of surface functional groups. Analysis of the impedance spectra reveals no significant diffusional constraints for protons in the coal’s pore structure, whereas substantial Warburg impedance is observed in the alkaline medium on account of the hindered migration of hydrated potassium ions. Despite lower unit capacitance in KOH electrolyte (98.7 F/g), the power density obtained (250 kW/kg) is comparable with that in sulfuric acid. We conclude that, for the chosen current density, the surface of the material is characterized by high kinetic accessibility for ions of both types. It follows from the low internal resistance (1.2 Ω) and high electronic conductivity of the material in both media that activated sapropelic coal is promising as a versatile basis for highly efficient supercapacitors.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 4","pages":"194 - 198"},"PeriodicalIF":0.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148519521","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

Synchronous Thermal Analysis of Commercial Petroleum Coke Samples 商品石油焦样的同步热分析

IF 0.6

Coke and Chemistry Pub Date : 2026-07-21 DOI: 10.3103/S1068364X26600375

S. A. Sozinov, A. N. Prigorodova, N. S. Zakharov

{"title":"Synchronous Thermal Analysis of Commercial Petroleum Coke Samples","authors":"S. A. Sozinov, A. N. Prigorodova, N. S. Zakharov","doi":"10.3103/S1068364X26600375","DOIUrl":"10.3103/S1068364X26600375","url":null,"abstract":"The pyrolysis of two series of commercial petroleum coke samples that differ significantly in microstructure—isotropic coke and needle coke—is studied by synchronous thermal analysis in combination with mass spectrometry of the gases produced. The particle size (1–2 mm) has the key influence on the thermolysis in a thermogravimetric experiment; on that basis, the structure-dependent aspects of the process may be identified. Isotropic coke is characterized by intense decomposition at lower temperatures (beginning at ~521°C) and considerable total mass loss (14.9%), whereas the thermal stability of needle coke is higher, with maximum losses at ~767°C and total mass losses of around 5%. Mass spectroscopy shows that isotropic coke is less aromatic, as indicated by the more intense CH4 and H2 liberation at low temperatures. Clear differences in the temperature profiles of gas liberation (CO2, CH4, H2) in pyrolysis correlate with the chemical composition and morphology of the coke. Thus, by thermogravimetric analysis and mass spectrometry of the gases produced, a direct relationship may be established between the microstructure of the petroleum coke and the kinetics of thermal decomposition. That permits prediction of its behavior in subsequent heat treatment.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 4","pages":"209 - 216"},"PeriodicalIF":0.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148519517","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

Catalytic Processing of a Phenolic Concentrate of Recycled Coke Plant Water 焦炭厂再生水酚浓缩物的催化处理

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Coke and Chemistry Pub Date : 2026-07-21 DOI: 10.3103/S1068364X26600387

A. T. Ordabaeva, Z. M. Muldakhmetov, M. G. Meiramov, S. V. Kim, Ya. A. Visurkhanova

引用次数: 0

Semicoking of Lignite under Pressure 褐煤加压半焦化

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Coke and Chemistry Pub Date : 2026-07-21 DOI: 10.3103/S1068364X26600363

S. R. Islamov, D. A. Loginov, A. P. Chernykh

引用次数: 0

World Market for Metallurgical Coal: 2025 Data and 2026 Prospects 世界炼焦煤市场：2025年数据与2026年展望

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Coke and Chemistry Pub Date : 2026-07-21 DOI: 10.3103/S1068364X26600326

S. V. Nedelin, S. V. Myasoyedov, P. I. Chernousov

{"title":"World Market for Metallurgical Coal: 2025 Data and 2026 Prospects","authors":"S. V. Nedelin, S. V. Myasoyedov, P. I. Chernousov","doi":"10.3103/S1068364X26600326","DOIUrl":"10.3103/S1068364X26600326","url":null,"abstract":"According to 2025 data, world exports of metallurgical coal amounted to 325 million t. Australia was the largest exporter, although its share of the total was no more than 45%. Recently, exports from Mongolia have grown most rapidly, thanks to the development of rail lines in collaboration with China. According to estimates, the top five exporters—China, India, Japan, the European Community, and South Korea—account for about 85–90% of the world trade in metallurgical coal. Supplies in China may remain unchanged in 2026. The lack of a free trade agreement between Russia and China puts Russia at a competitive disadvantage to Australia and Indonesia in terms of coal supplies to China because of import duties. Crude steel production in India increased by 10% between 2024 and 2025, reaching 164 million t. Australia contributes 54% of India’s imports, although its share has fallen as imports from Russia and the United States have increased. In Russia, the cost of average coking batch (in rubles) fell by 25% on account of weak internal and export markets for steel and the drop in coke production. The strong ruble reduces the ruble netback of Russian exporters—that is, the portion of export revenue that remains in rubles after accounting for foreign exchange sales and export duties. Despite the growth in world prices for high-quality coking coal, the strong ruble and expanding logistics often reduce export parity below producers’ costs.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 4","pages":"183 - 187"},"PeriodicalIF":0.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148519518","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

Optimization of Coke Plant Heating System To Ensure More Intense Heat Transfer and Smaller Temperature Gradients in Coke Oven Walls 焦化厂加热系统优化以保证更强的传热和更小的焦炉壁温度梯度

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Coke and Chemistry Pub Date : 2026-07-21 DOI: 10.3103/S1068364X26600399

V. A. Naletov, M. B. Glebov, A. Yu. Naletov, N. N. Karzaeva, V. A. Vasilenko

引用次数: 0