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Electrode Nanocomposites for Supercapacitors Based on Carbonized Sapropelic Coal Filled with Silver Nanoparticles 基于炭化腐泥煤填充纳米银的超级电容器电极纳米复合材料
IF 0.5
Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600484
G. Yu. Simeniuk, N. S. Zakharov, V. M. Pugachev, A. N. Popova, R. S. Parshkov
{"title":"Electrode Nanocomposites for Supercapacitors Based on Carbonized Sapropelic Coal Filled with Silver Nanoparticles","authors":"G. Yu. Simeniuk,&nbsp;N. S. Zakharov,&nbsp;V. M. Pugachev,&nbsp;A. N. Popova,&nbsp;R. S. Parshkov","doi":"10.3103/S1068364X25600484","DOIUrl":"10.3103/S1068364X25600484","url":null,"abstract":"<div><p>Mutually complementary research methods indicate that an electrode material based on carbonized sapropelic coal filled with silver nanoparticles is very promising for use in supercapacitor electrodes. In identifying the optimal conditions for applying the silver nanoparticles to the surface of the carbon matrix, three options are considered: with no reducing agent; with sodium tetrahydroborate; and with hydrazine hydrate. The option with no reducing agent yields the optimal capacitance. Charge accumulation in the electrodes is mainly due to a double electrode layer. The mean capacitance of the composites (537 F/g) is 20% higher than that of the basic carbon material (435 F/g). Impedance spectroscopy indicates that the capacitance is higher for the composite on account of the overall decrease in the electrical resistance. The decrease in resistance of the nanocomposite is greatest when applying the silver nanoparticles to the surface of the carbon matrix with no reducing agent.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"341 - 347"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167991","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
Replacement of Heating Oil with Mechanically Activated Coal 用机械活化煤替代采暖油
IF 0.5
Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600514
M. F. Kerimzhanova, E. R. Guzueva, A. S. Chulenyov
{"title":"Replacement of Heating Oil with Mechanically Activated Coal","authors":"M. F. Kerimzhanova,&nbsp;E. R. Guzueva,&nbsp;A. S. Chulenyov","doi":"10.3103/S1068364X25600514","DOIUrl":"10.3103/S1068364X25600514","url":null,"abstract":"<div><p>Experiments are conducted on the ignition and combustion of low-grade coal and its processing waste after mechanical and chemical activation. A method is developed for studying the reactivity of coal. On a laboratory test bench, well-known methods for determining the combustion conditions of coal (including lignite, Kuznetsk Basin coal, and Ekibastuz coal) are employed. Calibration of Kuznetsk Basin coal is completed. The axial and tangential combustion rates are determined for analysis and graphical interpretation. The ignition parameters of the coal samples are determined, and a system for monitoring the ignition is developed. The proposed method includes differential scanning calorimetry and mass spectrometric analysis of the gas. An example is given for thermal analysis of coal with differentiation of the stages in the process; curves for mass spectrometric analysis of the ionic currents are presented. The possibility of replacing fuel oil and gas with mechanically activated coal in the ignition and lighting systems of pulverized coal boilers is theoretically and experimentally established. The conclusion is that mechanically activated coal may be used as a universal fuel, with environmental and economic benefits. The proposed method may be used in modernizing and designing thermal power stations.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"359 - 365"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167992","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
Current World and Russian Markets for Coal: An Analysis 当前世界和俄罗斯煤炭市场分析
IF 0.5
Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600460
O. N. Didmanidze, N. V. Martyushev, R. V. Klyuev, M. A. Modina
{"title":"Current World and Russian Markets for Coal: An Analysis","authors":"O. N. Didmanidze,&nbsp;N. V. Martyushev,&nbsp;R. V. Klyuev,&nbsp;M. A. Modina","doi":"10.3103/S1068364X25600460","DOIUrl":"10.3103/S1068364X25600460","url":null,"abstract":"<div><p>The current state of the global and Russian coal industry is analyzed, and its prospects are assessed. Global trends in coal extraction and consumption are considered, with an emphasis on the major producing and consuming nations. Attention focuses on Russia’s global position, its contribution to coal extraction and exports, and the problems and prospects associated with the changing global energy balance. The analysis rests on information from open sources, including scientific articles, specialized reports, statistical data, and the predictions of international experts. The variation in the output, exports, and profits of the Russian coal industry between 2012 and 2023 is compared. The key factors affecting the competitiveness of coal are identified, and the basic trends in global prices and demands are noted. The influence of geopolitical factors and environmental requirements on the coal industry is analyzed, and the importance of new technologies and increased production efficiency in ensuring stable development is emphasized. The role of the coal industry in the energy security and economic development of nations is studied, and the need to develop strategies for adaptation to changing market conditions is stressed.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"327 - 336"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167989","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
Producing Granulated Carbon Adsorbent from Isotropic Petroleum Pitch 各向同性石油沥青制备颗粒状碳吸附剂
IF 0.5
Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600472
A. E. Eremenko, P. V. Kugatov, B. S. Zhirnov, S. R. Valeev, E. E. Minnikhanova
{"title":"Producing Granulated Carbon Adsorbent from Isotropic Petroleum Pitch","authors":"A. E. Eremenko,&nbsp;P. V. Kugatov,&nbsp;B. S. Zhirnov,&nbsp;S. R. Valeev,&nbsp;E. E. Minnikhanova","doi":"10.3103/S1068364X25600472","DOIUrl":"10.3103/S1068364X25600472","url":null,"abstract":"<div><p>A method is proposed for producing granulated carbon adsorbent from petroleum coke (activated by potassium hydroxide) and isotropic petroleum pitch. Granules with different proportions of filler and binder are prepared. According to the Brunauer–Emmett–Teller (BET) method, the specific surface is greatest for the sample with 90% activated coke and 10% binder (by mass): 1525 m<sup>2</sup>/g. With increase in binder content from 10% to 40%, the specific surface declines by a factor of two or three. It is established that isotropic petroleum pitch obtained as a byproduct in the production of mesophase petroleum pitch may be used as the binder. In terms of the BET specific surface and strength of the granules, the optimal binder content is 20–30%.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"337 - 340"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167990","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
Production and Analysis of Mesophase Pitch: A Review 中间相沥青的产生与分析综述
IF 0.5
Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600496
R. Yu. Kovalev, A. P. Nikitin
{"title":"Production and Analysis of Mesophase Pitch: A Review","authors":"R. Yu. Kovalev,&nbsp;A. P. Nikitin","doi":"10.3103/S1068364X25600496","DOIUrl":"10.3103/S1068364X25600496","url":null,"abstract":"<div><p>Applications of mesophase or anisotropic pitch include the production of anisotropic carbon fibers, needle coke, and construction materials. Research on the production of mesophase pitch is reviewed in the present work. Its production by heat treatment of coal tar pitch, synthetic pitch, and petroleum pitch is outlined. Physicochemical methods of identifying and investigating the mesophase structure of pitch are considered.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"348 - 355"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166966","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
Structural Characterization of Biotar and Biochar Products Obtained by Carbonization of Rhododendron ponticum L. 杜鹃花炭化制备生物焦油和生物炭的结构表征
IF 0.5
Coke and Chemistry Pub Date : 2025-07-04 DOI: 10.3103/S1068364X25600290
Hale Sütcü
{"title":"Structural Characterization of Biotar and Biochar Products Obtained by Carbonization of Rhododendron ponticum L.","authors":"Hale Sütcü","doi":"10.3103/S1068364X25600290","DOIUrl":"10.3103/S1068364X25600290","url":null,"abstract":"<p><i>Rhododendron ponticum</i> L. is a woody biomass commonly found in the Western Black Sea region of Turkey. This study aims to investigate the feasibility of <i>Rhododendron ponticum</i> L. in the energy field. For this purpose, <i>Rhododendron ponticum</i> L. was carbonized in a semi pilot Jenkner carbonization system at a heating rate of 3°C/min at temperatures of 350 and 550°C for 1 h. Structural characterization of the obtained liquid (biotar) and solid (biochar) products was investigated. The chemical characterization of biotar was carried out with elemental and proximate analyses, FTIR and <sup>1</sup>H NMR spectroscopies. The structural characterization of biochar was also investigated by elemental analysis, proximate analysis, FTIR spectroscopy and SEM images.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 3","pages":"321 - 326"},"PeriodicalIF":0.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161909","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 Thermal Reactions with α-Methylstyrene and Nitrobenzene on the Composition and Characteristics of the Anthracene Oil in Coal Tar α-甲基苯乙烯和硝基苯热反应对煤焦油中蒽油组成及特性的影响
IF 0.5
Coke and Chemistry Pub Date : 2025-07-04 DOI: 10.3103/S1068364X2560037X
A. P. Krasikova, E. I. Andreikov, D. O. Antonov, M. G. Pervova, E. F. Zhilina, K. A. Chistyakov
{"title":"Influence of Thermal Reactions with α-Methylstyrene and Nitrobenzene on the Composition and Characteristics of the Anthracene Oil in Coal Tar","authors":"A. P. Krasikova,&nbsp;E. I. Andreikov,&nbsp;D. O. Antonov,&nbsp;M. G. Pervova,&nbsp;E. F. Zhilina,&nbsp;K. A. Chistyakov","doi":"10.3103/S1068364X2560037X","DOIUrl":"10.3103/S1068364X2560037X","url":null,"abstract":"<p>The change in composition and characteristics of anthracene oil from coal tar on reacting with hydrogen acceptors (α-methylstyrene and nitrobenzene) at 360°C is studied. Besides the formation of cumene and aniline by the transfer of hydrogen from the anthracene oil, α-methylstyrene and nitrobenzene react with components in the anthracene oil to form products that cannot be determined by chromatography. In addition, polymerization of the components in the anthracene oil is observed. The anthracene oil is analyzed after reaction with α-methylstyrene and nitrobenzene by means of gas–liquid chromatography, elemental analysis, thermogravimetric analysis, gel permeation chromatography, NMR <sup>1</sup>H spectroscopy, IR spectroscopy, and UV fluorescent spectroscopy.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 3","pages":"212 - 220"},"PeriodicalIF":0.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161913","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
Determining the Optimal Coking Temperature on the Basis of Raman Spectroscopy 基于拉曼光谱的最佳焦化温度的确定
IF 0.5
Coke and Chemistry Pub Date : 2025-07-04 DOI: 10.3103/S1068364X25600368
M. V. Shishanov, M. S. Luchkin, A. A. Morozov, O. N. Volkova, M. I. Gilmkhanova
{"title":"Determining the Optimal Coking Temperature on the Basis of Raman Spectroscopy","authors":"M. V. Shishanov,&nbsp;M. S. Luchkin,&nbsp;A. A. Morozov,&nbsp;O. N. Volkova,&nbsp;M. I. Gilmkhanova","doi":"10.3103/S1068364X25600368","DOIUrl":"10.3103/S1068364X25600368","url":null,"abstract":"<p>Currently, Raman spectroscopy is the primary method of investigating carbon materials. In the present work, coke samples produced from the same batch but with different final temperatures are studied. On the basis of correlations between the spectral characteristics and the hot properties of the coke, the coking temperature corresponding to the best coke quality is determined. The potential of Raman spectroscopy for express tests of coke is demonstrated.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 3","pages":"206 - 211"},"PeriodicalIF":0.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161518","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
Plastic Parameters of Coal Batch 煤粉的塑性参数
IF 0.5
Coke and Chemistry Pub Date : 2025-07-04 DOI: 10.3103/S1068364X25600356
A. N. Smirnov, S. S. Zinchenko, S. A. Krylova
{"title":"Plastic Parameters of Coal Batch","authors":"A. N. Smirnov,&nbsp;S. S. Zinchenko,&nbsp;S. A. Krylova","doi":"10.3103/S1068364X25600356","DOIUrl":"10.3103/S1068364X25600356","url":null,"abstract":"<p>An additive model is used to calculate the main plastometric index: the plastic layer thickness <i>Y</i> for coal batch with 3–5 components. Calculated and experimental values of <i>Y</i> are compared. In the practical range of batch compositions, the additive approach permits determination of <i>Y</i> at a 95% confidence level. The results are verified for the batch components in the coke plant at Magnitorsk Iron and Steel Works (MMK).</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 3","pages":"202 - 205"},"PeriodicalIF":0.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161912","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
Electrode Nanocomposites of Supercapacitors Based on Functionalized Activated Charcoal Filled with Gold Nanoparticles 基于功能化活性炭填充金纳米粒子的超级电容器电极纳米复合材料
IF 0.5
Coke and Chemistry Pub Date : 2025-07-04 DOI: 10.3103/S1068364X25600381
G. Y. Simenyuk, N. S. Zakharov, A. N. Popova, V. M. Pugachev, V. G. Dodonov, V. I. Krasheninin
{"title":"Electrode Nanocomposites of Supercapacitors Based on Functionalized Activated Charcoal Filled with Gold Nanoparticles","authors":"G. Y. Simenyuk,&nbsp;N. S. Zakharov,&nbsp;A. N. Popova,&nbsp;V. M. Pugachev,&nbsp;V. G. Dodonov,&nbsp;V. I. Krasheninin","doi":"10.3103/S1068364X25600381","DOIUrl":"10.3103/S1068364X25600381","url":null,"abstract":"<p>The use of activated charcoal in electrodes for supercapacitors seems very promising. When activated charcoal is treated with aqueous hydrogen peroxide solution, oxygen-bearing functional groups are formed—primarily carbonyl groups. (This process is known as functionalization.) That results in approximately 40% increase in the electrical capacitance. If filler—2 wt % gold nanoparticles—is introduced in the resulting material, its pore structure is not blocked. By this means, the electrical capacitance may be increased by a further ~10%. The electrical capacitance of this nanostructured electrode material proves very stable (~86%) in repeated cycling of the potential (up to 500 cycles).</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 3","pages":"221 - 227"},"PeriodicalIF":0.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161519","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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