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Pyrolytic Carbon Production in Russia 俄罗斯的热解碳生产
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600854
V. M. Zaichenko, G. A. Sytchev, A. L. Shevchenko
{"title":"Pyrolytic Carbon Production in Russia","authors":"V. M. Zaichenko,&nbsp;G. A. Sytchev,&nbsp;A. L. Shevchenko","doi":"10.3103/S1068364X24600854","DOIUrl":"10.3103/S1068364X24600854","url":null,"abstract":"<p>Pyrolytic carbon (pyrocarbon) is a high-purity type of carbon resulting from the decomposition of gases, whether natural or formed as byproducts, within the porous carbon material generated by the thermal destruction of biomass. Hydrogen is formed in the thermal decomposition of hydrocarbon gases during semicoking. A cost–benefit analysis is presented for the construction of industrial systems to produce pyrocarbon. Systems for semicoke production based on the technology proposed by the Joint Institute for High Temperatures (in collaboration with Kurchatov Institute and Tatneft) are considered.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"472 - 475"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107867","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
A New Approach to Determining the Gas-Kinetic and Energy Properties of Coking Coal 测定焦煤气体动力学和能量性质的新方法
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600799
M. S. Plaksin, R. I. Rodin
{"title":"A New Approach to Determining the Gas-Kinetic and Energy Properties of Coking Coal","authors":"M. S. Plaksin,&nbsp;R. I. Rodin","doi":"10.3103/S1068364X24600799","DOIUrl":"10.3103/S1068364X24600799","url":null,"abstract":"<p>The gas-kinetic and energy properties of coking coal are studied. Samples collected by a fundamentally new approach proposed better reflect the properties of the undisturbed coal. The algorithm developed for laboratory research permits the collection of more information regarding the gas-kinetic and energy properties of the coal and provides the basis for new methods of assessing the explosion risk in the bed and the potential for gas releases.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"429 - 433"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108044","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
Final Cooling of Coke Oven Gas 焦炉煤气的最终冷却
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600829
K. V. Pokryshkin, E. O. Tyufyakova, N. V. Dementeva, V. I. Ekgauz
{"title":"Final Cooling of Coke Oven Gas","authors":"K. V. Pokryshkin,&nbsp;E. O. Tyufyakova,&nbsp;N. V. Dementeva,&nbsp;V. I. Ekgauz","doi":"10.3103/S1068364X24600829","DOIUrl":"10.3103/S1068364X24600829","url":null,"abstract":"<p>The latest systems for the final cooling of coke oven gas used in the byproduct capture shops of coke plants are reviewed. Treatment conditions for coke oven gas that meet current environmental and workplace safety requirements for coke plants are considered.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"446 - 453"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108287","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
The Evolution of Medium Sulfur Petroleum Coke during Heat Treatment and Coking Property 中硫石油焦在热处理过程中的演变及焦化性能
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600714
Xin Zhang, Hongyan Piao, Jingbao Lian, Jiao He, Hua Qin, Nianchu Wu, Xue Zhang
{"title":"The Evolution of Medium Sulfur Petroleum Coke during Heat Treatment and Coking Property","authors":"Xin Zhang,&nbsp;Hongyan Piao,&nbsp;Jingbao Lian,&nbsp;Jiao He,&nbsp;Hua Qin,&nbsp;Nianchu Wu,&nbsp;Xue Zhang","doi":"10.3103/S1068364X24600714","DOIUrl":"10.3103/S1068364X24600714","url":null,"abstract":"<p>Calcined petroleum coke serves as the principal raw material for pre-baked aluminum anodes. This study explores the influence of different calcination temperatures on the performance of petroleum coke, and explores the factors affecting coking property of petroleum coke blended with different proportions of calcined coke. This study analyzes the basic properties of medium sulfur coke from three different origins and evaluates the performance of petroleum coke: moisture, volatile matter, ash content, sulfur content, true density, powder resistivity, and coke ratio. The Lc value, microstructure evolution, and coking property were analyzed through DTA-TG-DTG, FTIR, Raman, XRD, polarizing microscope, and other tests. The research results indicate that the pyrolysis of three petroleum coke exhibits three stages of weight loss. As the calcination temperature increases, the carbon crystal structure is transformed to orderization, the crystal structure becomes more complete, and the microstructure evolves from short fibers to long fibers. The sulfur content decreased, the powder resistivity and true density both change towards better performance. As the blending ratio of calcined coke increases, the coke ratio of petroleum coke decreases and overall transitions towards orderization. FTIR detection shows that the asphaltene in petroleum coke significantly impacts the coking property.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"476 - 491"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107859","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
Investigating the Effect of Silica to Alumina Ratios on the Chemical Structure of Metakaolin Based Geopolymers 二氧化硅与氧化铝配比对偏高岭土基地聚合物化学结构影响的研究
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600738
Krishnan Dhanalakshmi, Muniraj Dhanasekaran, Prakash Arul Jose
{"title":"Investigating the Effect of Silica to Alumina Ratios on the Chemical Structure of Metakaolin Based Geopolymers","authors":"Krishnan Dhanalakshmi,&nbsp;Muniraj Dhanasekaran,&nbsp;Prakash Arul Jose","doi":"10.3103/S1068364X24600738","DOIUrl":"10.3103/S1068364X24600738","url":null,"abstract":"<p>This experimental study investigates the impact of different silica-to-alumina (Si/Al) ratios on geopolymers synthesized from metakaolin. Various ratios of Si/Al (1 : 1, 1.5 : 1, 2 : 1, 3 : 1, 4 : 1, and 5 : 1) were employed, nano-silica was the source material to alter the Si ratio. Microstructure and strength were analysed using SEM, XRD, NMR, and compressive strength testing Geopolymerization, a sustainable material synthesis process, was investigated using FTIR spectroscopy and computational modeling. The dissolution rates of aluminum and silicon molecules, as well as the formation of N-A-S-H gel, were studied. Results revealed that a Si/Al ratio of 2 : 1 significantly enhanced the dissolution of silicon and aluminum, leading to the formation of Si–O–T bonds and superior compressive strength. Computational analysis confirmed that the mechanical performance was primarily attributed to the formation of N-A-S-H gel, rather than zeolitic nuclei or silicate derivatives. These findings provide valuable insights for the application of geopolymerization in valorizing mine tailings, which often exhibit high Si/Al ratios.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"501 - 512"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107864","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
Extraction of Silver Ions from Aqueous Solution by Sorbents Based on Carbonized Lignite 炭化褐煤吸附剂萃取水溶液中的银离子
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600805
I. Yu. Zykov, N. I. Fedorova
{"title":"Extraction of Silver Ions from Aqueous Solution by Sorbents Based on Carbonized Lignite","authors":"I. Yu. Zykov,&nbsp;N. I. Fedorova","doi":"10.3103/S1068364X24600805","DOIUrl":"10.3103/S1068364X24600805","url":null,"abstract":"<p>If porous carbon materials derived from lignite are modified by means of nitric acid, how does that affect the sorption of silver ions from aqueous solution? To answer that question, we study carbonized lignite produced by box coking at 800 and 1000°C. Oxidative modification by nitric acid is found to reduce the ash content of carbonized lignite. The O/C atomic ratio is increased, and the content of various oxygen-bearing functional groups rises. In addition, the specific surface and the total pore volume of the carbonized lignite increase. Experiments on the sorption of silver ions from aqueous solution by the initial and modified samples show that oxidation of the carbonized lignite does not improve their sorption.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"434 - 438"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108042","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
Morphology and Mineral Composition of Humic Materials from Oxidized and Unoxidized Lignite 氧化和未氧化褐煤腐殖质的形态和矿物组成
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600830
S. A. Sozinov, S. I. Zherebtsov, K. S. Votolin, A. N. Popova, A. S. Nazimov
{"title":"Morphology and Mineral Composition of Humic Materials from Oxidized and Unoxidized Lignite","authors":"S. A. Sozinov,&nbsp;S. I. Zherebtsov,&nbsp;K. S. Votolin,&nbsp;A. N. Popova,&nbsp;A. S. Nazimov","doi":"10.3103/S1068364X24600830","DOIUrl":"10.3103/S1068364X24600830","url":null,"abstract":"<p>Oxidized and unoxidized samples of 2B lignite from the Tisul deposit of the Kansk-Achinsk coal basin are investigated. By means of a scanning electron microscope, the oxidized and unoxidized samples are shown to differ considerably in chemical and granulometric composition and also in particulate morphology of the humic and fulvic acids extracted from the lignite samples. These differences may be attributed to the chemical composition of the samples’ organic mass and mineral component. Oxidized lignite has a higher concentration of calcium (Ca), which binds predominantly with the organic mass; and iron (Fe), present as hematite. These elements pass mainly to the humic and fulvic acids, leading to the formation of particles that are denser and more amorphous. In contrast, the humic and fulvic acids from the unoxidized samples take the form of aggregates constituting a porous structure or sheet-like aggregates forming a laminar structure. Understanding the differences in chemical composition and morphology of the particles of humic and fulvic acids extracted from different forms of lignite is of great benefit for their practical application in fields such as ecology, agriculture, and the power industry.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"454 - 463"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108286","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
Study on Microstructure of Raw Coal Pyrolysis Coke 原煤热解焦的微观结构研究
IF 0.4
Coke and Chemistry Pub Date : 2025-02-03 DOI: 10.3103/S1068364X24600751
Huining Wei, Likai Qu, Hongming Fang, Feiping Huang, Lan Yi, Qin Qin
{"title":"Study on Microstructure of Raw Coal Pyrolysis Coke","authors":"Huining Wei,&nbsp;Likai Qu,&nbsp;Hongming Fang,&nbsp;Feiping Huang,&nbsp;Lan Yi,&nbsp;Qin Qin","doi":"10.3103/S1068364X24600751","DOIUrl":"10.3103/S1068364X24600751","url":null,"abstract":"<p>The objective of this study is to examine the alterations in the micro-optical properties of blast furnace fuel following combustion, and to establish a theoretical framework for the selection of injection fuel in industrial blast furnaces. This research examines the average reflectivity and optical structure of different types of coal (lignite 1#, bituminous coal 2# and 3#, and anthracite 4#) at various coking temperatures (ranging from 500 to 1000°C) using a digital coal and rock analyzer. The findings indicated that the optical microstructure of samples 1# and 4# consistently exhibited a predominant component, whereas samples 2# and 3# displayed a significant presence of anisotropic microstructure throughout the pyrolysis process. As the pyrolysis temperature rises, the anisotropic structure of coke derived from 2# and 3# coals also increases. Additionally, the mean reflectivity of coke derived from the four types of coals increases as the coalification degree increases at the same temperature.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 8","pages":"513 - 521"},"PeriodicalIF":0.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107865","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
Improvement in Heat Transfer at Coke Battery Chamber Walls 改善焦炭蓄电池室壁的传热性能
IF 0.4
Coke and Chemistry Pub Date : 2024-10-23 DOI: 10.3103/S1068364X24600659
V. V. Zinov’eva, M. S. Luchkin, M. V. Shishanov, A. Yu. Naletov
{"title":"Improvement in Heat Transfer at Coke Battery Chamber Walls","authors":"V. V. Zinov’eva,&nbsp;M. S. Luchkin,&nbsp;M. V. Shishanov,&nbsp;A. Yu. Naletov","doi":"10.3103/S1068364X24600659","DOIUrl":"10.3103/S1068364X24600659","url":null,"abstract":"<div><p>The radiant capacity of triatomic gases such as H<sub>2</sub>O and CO<sub>2</sub> is investigated as a function of the density and thickness of the gas layer (the radiant path length). It is established that, when the path length is short, the radiant capacity of carbon dioxide predominates; when it is long, the radiant capacity of water vapor predominates. Assessment of the radiant heat-transfer coefficients in heating ducts, for the example of coke battery chambers at Moskoks, indicates that the heat-transfer of water vapor makes the greatest contribution. It increases with increase in content of water vapor in the combustion products of coke oven gas. Computer experiments confirm that supplying superheated steam (around 5 vol % of the air flux) to the combustion zone increases the radiant heat-transfer coefficients from 91.2 to 106.0 W/m<sup>2</sup> K. That intensifies coking, with simultaneous decrease in the generation of nitrogen oxides. (This technique is sometimes known as green steam injection.)</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 7","pages":"378 - 382"},"PeriodicalIF":0.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518510","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
Using Anthracene Oil from Coal Tar in the Thermal Solvolysis of Polymers 利用煤焦油中的蒽油热溶解聚合物
IF 0.4
Coke and Chemistry Pub Date : 2024-10-23 DOI: 10.3103/S1068364X24600635
A. P. Krasikova, E. I. Andreikov, D. O. Antonov, M. G. Pervova
{"title":"Using Anthracene Oil from Coal Tar in the Thermal Solvolysis of Polymers","authors":"A. P. Krasikova,&nbsp;E. I. Andreikov,&nbsp;D. O. Antonov,&nbsp;M. G. Pervova","doi":"10.3103/S1068364X24600635","DOIUrl":"10.3103/S1068364X24600635","url":null,"abstract":"<div><p>At 360–420°C in a metal reactor, the thermal solvolysis of polystyrene, phenol–formaldehyde resin, polycarbonate, and epoxy resin by means of the anthracene fraction from coal tar is studied. The composition of the polymers’ thermal destruction products is determined by gas chromatography. The anthracene fraction and coal tar pitch are compared as hydrogen-donor solvents in polymer processing by thermal solvolysis.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 7","pages":"393 - 397"},"PeriodicalIF":0.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518508","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
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