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Features of Rhenium Distribution in Dictyonema Shales of the Baltic Basin (within the Leningrad Oblast) 波罗的海盆地（列宁格勒州内）Dictyonema页岩铼分布特征
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S036152192570017X
V. I. Vyalov, T. A. Dyu, E. P. Shishov, A. V. Nastavkin
{"title":"Features of Rhenium Distribution in Dictyonema Shales of the Baltic Basin (within the Leningrad Oblast)","authors":"V. I. Vyalov,&nbsp;T. A. Dyu,&nbsp;E. P. Shishov,&nbsp;A. V. Nastavkin","doi":"10.3103/S036152192570017X","DOIUrl":"10.3103/S036152192570017X","url":null,"abstract":"<p>The article presents the results of studies of the distribution of rhenium in black (dictyonema) shales of the Baltic basin in the Kaibolovo–Gostilitsy area located in the Leningrad oblast. Rhenium contents exceeding the levels of minimum industrial concentrations in known types of complex ores have been determined. The distribution of rhenium in the organic and mineral matter of black shales has been studied. The distribution of rhenium in the dictyonema shale formation over the area and in the section of the shale-bearing stratum and the conditions under which rhenium mineralization was formed are described. The rhenium resources in the dictyonema shales of the Russian part of the Baltic basin should be considered as a new unconventional source of this valuable strategic metal.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"282 - 289"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrogenation Kinetics of Coal and Its Heavy Liquefied Products 煤及其重质液化产物的加氢动力学
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S0361521925700235
Shigang Kang, Xinting Zhou, Songtao Liang, Hengfu Shui, Zhicai Wang, Zhiping Lei, Shibiao Ren, Jingchong Yan, Zhanku Li, Chunxiu Pan, Honglei Yan, Weidong Zhang
{"title":"Hydrogenation Kinetics of Coal and Its Heavy Liquefied Products","authors":"Shigang Kang,&nbsp;Xinting Zhou,&nbsp;Songtao Liang,&nbsp;Hengfu Shui,&nbsp;Zhicai Wang,&nbsp;Zhiping Lei,&nbsp;Shibiao Ren,&nbsp;Jingchong Yan,&nbsp;Zhanku Li,&nbsp;Chunxiu Pan,&nbsp;Honglei Yan,&nbsp;Weidong Zhang","doi":"10.3103/S0361521925700235","DOIUrl":"10.3103/S0361521925700235","url":null,"abstract":"<p>The distribution and kinetic analysis of catalytic hydrogenation products derived from preasphaltenes (PA) were examined. A kinetic model was developed using the lump kinetic method to simulate the hydrogenation of PA catalyzed by FeS and S. The study revealed that PA is directly converted into asphaltenes (AS) and oil, followed by the further hydrocracking of AS into oil and gas products. At higher temperatures, there is a noticeable regression of PA to char and AS back to PA. Increased temperature and longer reaction time were found to enhance the conversion of PA and the yield of oil and gas products. Under conditions of 400°C and 60 min, the hydrogenation of PA achieved a conversion rate of 75.92% with an oil and gas yield of 32.76%. The hydrogenation conversions from the model corresponded well with experimental data, and the activation energies ranged from 67 to 224 kJ · mol<sup>–1</sup>.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"328 - 335"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Isolation of Fulvic Acids by Extraction with n-Butanol 正丁醇萃取分离黄腐酸
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S0361521925700181
S. I. Zherebtsov, K. M. Shpakodraev, K. S. Votolin, N. V. Malyshenko
{"title":"Isolation of Fulvic Acids by Extraction with n-Butanol","authors":"S. I. Zherebtsov,&nbsp;K. M. Shpakodraev,&nbsp;K. S. Votolin,&nbsp;N. V. Malyshenko","doi":"10.3103/S0361521925700181","DOIUrl":"10.3103/S0361521925700181","url":null,"abstract":"<p>The article considers the methods of fulvic acid (FA) extraction from brown coals by the Tyurin–Forsyth method and by liquid-phase extraction with <i>n</i>-butyl alcohol. The data of technical and elemental analysis and IR and <sup>13</sup>C NMR spectroscopy of the obtained fulvic acid samples and their fractions are presented. A comparative characterization of the obtained fulvic acids is carried out. It was established that the fulvic acid fractions obtained by the Tyurin–Forsyth method had a higher aromaticity index ( <i>f</i><sub>ar</sub> = 32.79–61.54%) than the fulvic acids obtained by liquid-phase extraction with <i>n</i>-butyl alcohol ( <i>f</i><sub>ar</sub> = 20.64%). Conclusions were made on the possibility and efficiency of using the liquid-phase extraction method with <i>n</i>-butyl alcohol for extracting brown coal fulvic acids.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"290 - 296"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Moisture on the Characteristics of Co-Incineration of Pulp and Paper Sludge and Municipal Waste 水分对纸浆、造纸污泥和城市垃圾共烧特性的影响
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S0361521925700211
P. A. Maryandyshev, A. Brillard, A. P. Terekhin
{"title":"Effect of Moisture on the Characteristics of Co-Incineration of Pulp and Paper Sludge and Municipal Waste","authors":"P. A. Maryandyshev,&nbsp;A. Brillard,&nbsp;A. P. Terekhin","doi":"10.3103/S0361521925700211","DOIUrl":"10.3103/S0361521925700211","url":null,"abstract":"<p>The combustion behavior of a wet mixture of sludge from a pulp and paper plant and municipal waste was analyzed through complementary experiments. The collected mixed sludge was first naturally dried to decrease its initial moisture percentage to 5–9%. Pure water with mass proportions between 30 and 60% was added to the naturally dried samples to analyze their combustion behavior. Thermogravimetric experiments were carried out with the dried and humidified samples under air and at heating rates between 5 and 100 K/min. The thermogravimetric profiles and the heat flows of the dried and humidified samples were compared. The emissions of CO, CO<sub>2</sub>, and total hydrocarbons were measured during further combustion experiments carried out at isothermal temperatures of 600, 700, 800, and 900°C.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"311 - 318"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Mine Water on Coal Physicochemical Properties and Spontaneous Combustion Characteristics 矿井水对煤理化性质及自燃特性的影响
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S0361521925700223
Runzhi Li, Ensi Xue
{"title":"Effect of Mine Water on Coal Physicochemical Properties and Spontaneous Combustion Characteristics","authors":"Runzhi Li,&nbsp;Ensi Xue","doi":"10.3103/S0361521925700223","DOIUrl":"10.3103/S0361521925700223","url":null,"abstract":"<p>To explore the impact of mine water composition on the spontaneous combustion properties of coal samples, the physicochemical characteristics of untreated raw coal (RC) and coal samples soaked in mine water (SC) were comparatively analyzed. The findings indicate that the chemical components of mine water significantly influence the spontaneous combustion behavior of coal. Electron microscopy experiments demonstrated noticeable changes in the surface morphology and pore structures of SC, leading to an increased oxidation rate and a heightened risk of spontaneous combustion. Energy dispersive spectroscopy (EDS) analysis revealed a decrease in carbon content alongside an increase in oxygen and sulfur concentrations on the SC surface, further facilitating the spontaneous combustion process. Simultaneous thermal analysis experiments indicated that characteristic temperatures, such as pyrolysis and ignition points of SC, were generally lower than those of RC, suggesting a stronger propensity for spontaneous combustion. <sup>13</sup>C NMR results showed a higher content of oxygen-containing functional groups in SC compared to RC, although the aromatic carbon content remained similar. A comprehensive evaluation suggests that SC exhibits an enhanced tendency towards spontaneous combustion. Additionally, programmed temperature experiments revealed that temperatures at which SC generated spontaneous combustion indicator gases were consistently lower than those observed for RC, reinforcing the conclusion that SC possesses a higher spontaneous combustion tendency. In summary, soaking coal samples in mine water substantially increases their spontaneous combustion risk by modifying their physicochemical properties.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"319 - 327"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relationship of Structural-Group Composition and Biological Activity of Humic Substances from Unoxidized and Oxidized Coals at Different Stages of Coalficiation 不同炭化阶段未氧化和氧化煤腐殖质结构-基团组成与生物活性的关系
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S0361521925700168
K. S. Votolin, S. I. Zherebtsov, K. M. Shpakodraev
{"title":"Relationship of Structural-Group Composition and Biological Activity of Humic Substances from Unoxidized and Oxidized Coals at Different Stages of Coalficiation","authors":"K. S. Votolin,&nbsp;S. I. Zherebtsov,&nbsp;K. M. Shpakodraev","doi":"10.3103/S0361521925700168","DOIUrl":"10.3103/S0361521925700168","url":null,"abstract":"<p>The article presents the results of a study of unoxidized and naturally oxidized (weathered) brown and hard coals of early diagenesis and humic acids (HAs) and fulvic acids (FAs) obtained from them. Using <sup>13</sup>C NMR (CP/MAS) spectroscopy, it was found that the structural-group composition of the isolated HAs was determined by the composition of the original coals (<i>R</i><sup>2</sup> = 0.81), and it affected the magnitude of biological activity using wheat seeds as an example (<i>R</i><sup>2</sup> = 0.75). The structural-group composition of the isolated FAs was weakly related to the composition of the original coals, and it was more homogeneous. The high quantitative yield and biological activity of HAs and FAs from unoxidized and oxidized brown coals allowed us to recommend them for agriculture. The HAs and FAs from oxidized coals had low biological activity, and they can be considered as technical reagents.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"272 - 281"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dependence of Surface Wettability and Filtration Capacity of Coals on the Degree of Metamorphism 煤的表面润湿性和过滤能力与变质程度的关系
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S0361521925700156
Yu. F. Patrakov, S. A. Semenova, T. A. Papina, A. V. Yarkova
{"title":"Dependence of Surface Wettability and Filtration Capacity of Coals on the Degree of Metamorphism","authors":"Yu. F. Patrakov,&nbsp;S. A. Semenova,&nbsp;T. A. Papina,&nbsp;A. V. Yarkova","doi":"10.3103/S0361521925700156","DOIUrl":"10.3103/S0361521925700156","url":null,"abstract":"<p>The property of the coal surface to be wetted with various liquids is important for many technological processes of coal mining, sorting, processing, and transportation. In this work, we used the determination of the contact angle of the coal surface and the filtration of liquid through a layer of coal powder to characterize the wettability. The influence of changes in the chemical composition and porosity of coals in the series of their metamorphism on the wettability characteristics was estimated. It was shown that the wettability and filtration properties of coals exhibited an extreme dependence with a minimum at the middle stage of metamorphism.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"265 - 271"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural Features of Coals and Their Proneness to Spontaneous Combustion 煤的结构特征及其自燃倾向
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S036152192570020X
E. L. Kossovich, S. A. Epshtein, N. N. Kondratev, V. G. Nesterova, N. N. Dobryakova
{"title":"Structural Features of Coals and Their Proneness to Spontaneous Combustion","authors":"E. L. Kossovich,&nbsp;S. A. Epshtein,&nbsp;N. N. Kondratev,&nbsp;V. G. Nesterova,&nbsp;N. N. Dobryakova","doi":"10.3103/S036152192570020X","DOIUrl":"10.3103/S036152192570020X","url":null,"abstract":"<p>The paper presents the results of an assessment of the influence of coals’ structural features on their proneness to spontaneous combustion. Fifteen samples of hard coals and anthracite from different deposits of the Russian Federation were used as objects of study. Based on the deconvolution of coal vitrinite Raman spectra, a structural index characterizing the ratio between amorphous and crystallite forms of carbon compounds has been identified. It is noted that this index differs significantly for coals with a close stage of metamorphism. For the studied coals, the activity to ozone was determined for two types of sites that are differing in the rate of deactivation when interacting with it. It is shown that the activity of sites of the first type (with a higher deactivation rate when interacting with ozone) grows with an increase in the proportion of crystalline carbon in the coals’ vitrinite. Whereas, the activity of sites of the second type (with a low rate of deactivation) generally decreases. The kinetic parameters of coal combustion (ignition temperature and activation energy) were estimated according to their thermogravimetric analysis in the air environment. It is shown that with an increase in the proportion of amorphous carbon compounds in vitrinite of coals, both the ignition temperature and the activation energy of coal combustion decrease, which altogether leads to an increase of a risk of spontaneous combustion.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"301 - 310"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of Chlorine-Containing Organic Compounds in the Thermal Processing Resin of Oil Shale from the Perelyubskoye Deposit Perelyubskoye矿床油页岩热加工树脂中含氯有机物的测定
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-07-22 DOI: 10.3103/S0361521925700193
D. S. Khudyakov, A. M. Kozlov, F. G. Zhagfarov
{"title":"Determination of Chlorine-Containing Organic Compounds in the Thermal Processing Resin of Oil Shale from the Perelyubskoye Deposit","authors":"D. S. Khudyakov,&nbsp;A. M. Kozlov,&nbsp;F. G. Zhagfarov","doi":"10.3103/S0361521925700193","DOIUrl":"10.3103/S0361521925700193","url":null,"abstract":"<p>The distribution of organic chlorine in the fractions of semicoking resin of the oil shale from the Perelyubskoye deposit was studied. The highest concentrations of organochlorine compounds were determined in the resin fractions with boiling ranges of 100–120, 140–160, 240–260, and 280–320°C. Based on the experimental data, possible ways of further use of shale resin were proposed.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 4","pages":"297 - 300"},"PeriodicalIF":0.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 Resins and an Inhibiting Additive on the Process of Sedimentation in Paraffin Oils 树脂及抑制添加剂对石蜡油沉积过程的影响
IF 0.9 4区 工程技术
Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700053
A. N. Verner, I. V. Prozorova, N. V. Yudina
{"title":"Influence of Resins and an Inhibiting Additive on the Process of Sedimentation in Paraffin Oils","authors":"A. N. Verner,&nbsp;I. V. Prozorova,&nbsp;N. V. Yudina","doi":"10.3103/S0361521925700053","DOIUrl":"10.3103/S0361521925700053","url":null,"abstract":"<p>The sedimentation in high-paraffin oil with the addition of different resins and an inhibiting additive was studied. It was found that the amount of oil sediment decreased with an increase in the concentration of resins in oil with a lower surface tension and a large number of heteroatomic components. With an increase in the fraction of resins with a higher content of polysubstituted aromatic structures, an increase in the amount of oil sediment and a decrease in the efficiency of the inhibiting additive were observed. With an increase in the amount of oil resin additives, the fraction of low-molecular-weight <i>n</i>-alkanes in the composition of asphalt–resin–paraffin deposits (ARPD) decreased and the average sizes of paraffin hydrocarbon aggregates decreased.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 3","pages":"198 - 203"},"PeriodicalIF":0.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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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