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Production of Mesophase Binder Pitch from Thermally Cracked Decantoil and Its +250°C Fraction. 1. Physical and Chemical Properties of the Raw Materials
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601185
A. A. Mukhamedzyanova, A. N. Lobov, N. Yu. Beilina
{"title":"Production of Mesophase Binder Pitch from Thermally Cracked Decantoil and Its +250°C Fraction. 1. Physical and Chemical Properties of the Raw Materials","authors":"A. A. Mukhamedzyanova,&nbsp;A. N. Lobov,&nbsp;N. Yu. Beilina","doi":"10.3103/S1068364X24601185","DOIUrl":"10.3103/S1068364X24601185","url":null,"abstract":"<div><p>Petroleum pitch is a valuable raw material in many industries. It is in considerable demand: 10<sup>4</sup>–10<sup>5</sup> t/yr. In the present work, the physicochemical properties of thermally cracked decantoil (decanted heavy gas oil) and its 250°C fraction are investigated by standard methods used for petroleum derivatives. In terms of its group composition, content of condensed polyaromatic compounds, coking properties, and sulfur content, these materials are suitable for the production of binders used in the electrode industry and carbon–carbon construction materials.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"715 - 722"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622199","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
Kinetics of Reduction by Carbon from Special Coke Used in Electrothermal Silicon Production for the C–Fe–O System
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601215
G. A. Ulyeva
{"title":"Kinetics of Reduction by Carbon from Special Coke Used in Electrothermal Silicon Production for the C–Fe–O System","authors":"G. A. Ulyeva","doi":"10.3103/S1068364X24601215","DOIUrl":"10.3103/S1068364X24601215","url":null,"abstract":"<div><p>Kinetic features of the carbon in rexil special coke obtained from long-flame Shubarkol coal and used for electrothermal production of silicon are outlined. For the example of the C–Fe–O system, it is found that, in comparison with other reducing agents (graphite, blast furnace coke), rexil is characterized by high reaction rate and activation energy. Experimental and industrial tests regarding silicon production from ore in electric furnaces indicate that practically all of the charcoal in the batch may be replaced by rexil. For example, when the ratio of rexil and coal (in terms of fixed carbon C<sub>so</sub>) is 80 : 20, the furnace productivity is increased, the degree of silicon extraction (91%) is increased, and the mean silicon content (97.8%) is increased.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"735 - 741"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622201","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 Coking Parameters on Coke Quality: Analysis Based on Machine Learning
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601173
M. V. Shishanov, M. S. Luchkin, A. Yu. Naletov, I. S. Mezrin
{"title":"Influence of Coking Parameters on Coke Quality: Analysis Based on Machine Learning","authors":"M. V. Shishanov,&nbsp;M. S. Luchkin,&nbsp;A. Yu. Naletov,&nbsp;I. S. Mezrin","doi":"10.3103/S1068364X24601173","DOIUrl":"10.3103/S1068364X24601173","url":null,"abstract":"<div><p>The influence of coking parameters on coke quality is investigated by means of machine learning and data analysis. A model is developed for predicting the reactivity of coke on the basis of the coking parameters; it proves highly accurate. The potential of machine learning in optimizing the coking parameters that affect coke quality is clear.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"710 - 714"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622198","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
Comparison of Settling Equipment for Tar Removal from Water in the Condensation Department of Byproduct Capture Shops
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601227
V. I. Ekgauz, M. S. Vlasov
{"title":"Comparison of Settling Equipment for Tar Removal from Water in the Condensation Department of Byproduct Capture Shops","authors":"V. I. Ekgauz,&nbsp;M. S. Vlasov","doi":"10.3103/S1068364X24601227","DOIUrl":"10.3103/S1068364X24601227","url":null,"abstract":"<div><p>The structure of various systems for the separation of tar, water, and sludge in the condensation department is analyzed, along with the flow patterns in the equipment. The characteristics of mechanized clarifiers are presented. On the basis of the Reynolds number, the best system for removing ammoniacal water from tar by settling in the condensation department of byproduct capture shops is determined. Adjustments to the system dimensions to improve settling conditions are proposed.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"742 - 748"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622202","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
Laser Ignition of Lignite Microparticles with Different Ash Content
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X2460115X
B. P. Aduev, D. R. Nurmukhametov, N. V. Nelyubina, I. Yu. Liskov, V. D. Volkov
{"title":"Laser Ignition of Lignite Microparticles with Different Ash Content","authors":"B. P. Aduev,&nbsp;D. R. Nurmukhametov,&nbsp;N. V. Nelyubina,&nbsp;I. Yu. Liskov,&nbsp;V. D. Volkov","doi":"10.3103/S1068364X2460115X","DOIUrl":"10.3103/S1068364X2460115X","url":null,"abstract":"<div><p>The laser ignition of lignite microparticles (63 μm) in the form of samples with bulk density 0.5 g/cm<sup>2</sup> is investigated. The ash content is 10.1% for the initial samples and 0.5% for demineralized samples. Radiation from a pulsed neodymium laser (1064 nm, 120 μs) and a continuous diode laser (808 nm) is used for ignition. It is found that, in comparison with the initial samples, radiation of higher energy density is required for release and ignition of volatile compounds and ignition of the nonvolatile residue from demineralized samples. When using single laser doses, the mass remaining after combustion is greater for the initial samples than for the demineralized samples. That indicates catalytic action of the coal ash in sample combustion.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"695 - 703"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622128","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
Thermogravimetric Analysis of Coal Activated by Various Means
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601161
I. Yu. Matasova, M. Kh. Abduev, O. A. Khromova
{"title":"Thermogravimetric Analysis of Coal Activated by Various Means","authors":"I. Yu. Matasova,&nbsp;M. Kh. Abduev,&nbsp;O. A. Khromova","doi":"10.3103/S1068364X24601161","DOIUrl":"10.3103/S1068364X24601161","url":null,"abstract":"<div><p>The organization of thermal analysis using a differential scanning calorimeter to investigate the combustion of fuel mixtures based on coal prepared by different methods is considered. The results of thermogravimetric analysis are presented for coal prepared in a mill and a disintegrator. Stages in the combustion process are distinguished. The idea that thermal analysis is an objective means of assessing the properties of materials at different temperatures is briefly discussed. An organizing procedure is proposed for experiments on the ignition of lignite, coal, and anthracite using a test bench that simulates a vertical tubular furnace. According to the experiments, the peak of energy liberation in combustion is at 580°C; active mass loss begins at 520°C. For coal samples crushed in a hammer mill, this peak is at 480°C; for samples from a disintegrator, it is at 420°C. The ignition time of mechanically activated coal depends on the presence of chemical processes with the liberation of volatiles, which readily ignite. Deep crushing also shortens the ignition time. An alternative method of determining the ignition temperature is outlined; in this method, the temperature is decreased to the ignition temperature. Results obtained by this method are presented.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"704 - 709"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622197","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
Coal Derivatives and Coking Byproducts for Supercapacitor Electrodes
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601203
T. S. Nechaeva, G. Yu. Simenyuk, A. N. Popova, Yu. A. Zakharov
{"title":"Coal Derivatives and Coking Byproducts for Supercapacitor Electrodes","authors":"T. S. Nechaeva,&nbsp;G. Yu. Simenyuk,&nbsp;A. N. Popova,&nbsp;Yu. A. Zakharov","doi":"10.3103/S1068364X24601203","DOIUrl":"10.3103/S1068364X24601203","url":null,"abstract":"<div><p>This article provides an overview of coal derivatives and coking byproducts that are promising as electrodes in superconductors. Results obtained in the past decade are considered: methods of producing carbon materials, properties of the porous structure, and values of the electrodes’ unit electrochemical capacitance. Their prospects for practical application are assessed. It is found that coal of various ranks and coking byproducts are promising for the production of superconductor electrodes. For superconductor electrodes produced from carbonized coal, coal tar, and pitch, the unit electrochemical capacitance is high: ≤200 F/g.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"730 - 734"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622200","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
Biological Destruction of Pollutants in Coke Plant Wastewater: A Review
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601239
I. V. Nevolina, T. M. Sabirova
{"title":"Biological Destruction of Pollutants in Coke Plant Wastewater: A Review","authors":"I. V. Nevolina,&nbsp;T. M. Sabirova","doi":"10.3103/S1068364X24601239","DOIUrl":"10.3103/S1068364X24601239","url":null,"abstract":"<div><p>Literature data on the following topics is reviewed: formation of the wastewater stream at coke plants; the composition of the untreated and treated wastewater; and the physicochemical properties of the pollutants present. The high residual bichromate oxidizability (chemical oxygen demand) of biologically treated wastewater is found to be largely due to secondary pollutants formed in the endogenic respiration of active sludge (intermediate and final metabolites).</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"749 - 760"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622203","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 Iron and Manganese Ions from Aqueous Systems by Carbon-Based Absorbents
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601197
O. V. Belyaeva, N. V. Gora, N. S. Golubeva, E. S. Mikhaylova, I. V. Timoshchuk
{"title":"Extraction of Iron and Manganese Ions from Aqueous Systems by Carbon-Based Absorbents","authors":"O. V. Belyaeva,&nbsp;N. V. Gora,&nbsp;N. S. Golubeva,&nbsp;E. S. Mikhaylova,&nbsp;I. V. Timoshchuk","doi":"10.3103/S1068364X24601197","DOIUrl":"10.3103/S1068364X24601197","url":null,"abstract":"<div><p>The mutual influence of heavy metal ions when they are adsorbed by SKD-515 granulated carbon is investigated; attention centers on ions typical of mine and quarry runoff at mining enterprises. The change in sorbent texture after absorption of pollutant ions is assessed by various physical and chemical methods. In studying the equilibrium and kinetics of heavy metal absorption by SKD-515 granulated carbon, it is found that the presence of a second ion markedly decreases the equilibrium adsorption of Fe<sup>2+</sup> ions; for Mg<sup>2+</sup> ions, the second ion reduces the rate at which equilibrium is attained. The Langmuir and Dubinin–Radushkevich models are used to calculate the basic parameters of adsorption equilibrium. The kinetic model describing adsorption is determined, and the contribution of diffusion in the film during the limiting stage of extraction is estimated.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"723 - 729"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622195","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
Sorbent for Industrial Wastewater Treatment
IF 0.4
Coke and Chemistry Pub Date : 2025-03-14 DOI: 10.3103/S1068364X24601240
A. K. Gorelkina, E. S. Mikhaylova, I. V. Timoshchuk
{"title":"Sorbent for Industrial Wastewater Treatment","authors":"A. K. Gorelkina,&nbsp;E. S. Mikhaylova,&nbsp;I. V. Timoshchuk","doi":"10.3103/S1068364X24601240","DOIUrl":"10.3103/S1068364X24601240","url":null,"abstract":"<div><p>Sorption is generally used to reduce water pollution. Many sorbents with different characteristics are commercially available. In pollutant extraction, the selectivity of the sorbent is important. The development of a sorptional extraction process must be based on experimental data. The present article provides isotherms; thermodynamic characteristics of the material obtained using various models; the pH of the zero charge point (pH<sub>zcp</sub>); and the minimum sorbent dose required for decontamination in accordance with the standards for lakes and rivers used for fishing.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 12","pages":"761 - 764"},"PeriodicalIF":0.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622204","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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