Solid Fuel Chemistry最新文献_第4页

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

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, S. A. Epshtein, N. N. Kondratev, V. G. Nesterova, N. N. Dobryakova","doi":"10.3103/S036152192570020X","DOIUrl":"10.3103/S036152192570020X","url":null,"abstract":"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.","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

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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

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Transformation of the Resins of High-Sulfur Tar in the Cracking Process 高硫焦油树脂在裂化过程中的转化

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700090

A. V. Goncharov, E. B. Krivtsov

{"title":"Transformation of the Resins of High-Sulfur Tar in the Cracking Process","authors":"A. V. Goncharov, E. B. Krivtsov","doi":"10.3103/S0361521925700090","DOIUrl":"10.3103/S0361521925700090","url":null,"abstract":"The article presents the results of studying resins isolated from the liquid cracking products of sulfur tar from the Omsk Oil Refinery. Thermal treatment was carried out at 500°C for 15, 30, 45, and 60 min. It was found that the yield of coke increased with the duration of tar cracking due to the condensation of resins into asphaltenes and then into coke. Changes in the structural-group parameters of resins in the course of cracking process were established using 1H NMR spectroscopic data, elemental composition, and the results of molecular weight measurements. Averaged resin molecules became more condensed, and they were characterized by an increased concentration of aromatic fragments and a decrease in the numbers of naphthenic fragments and aliphatic substituents. The set of data on changes in the composition of cracking products together with an analysis of sulfur distribution in the products indicated a significant contribution of sulfur-containing structural fragments of resins to the accumulation processes of thiophene derivatives. It was shown that the cracking of resins was accompanied by the formation of a wide range of low-molecular-weight sulfur-containing compounds in the composition of oils.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 3","pages":"234 - 239"},"PeriodicalIF":0.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164927","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 Modification of Humic Acids in a Barrier Discharge Plasma 阻挡放电等离子体中腐植酸的结构修饰

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700144

N. V. Yudina, A. Ryabov, S. V. Kudryashov, S. I. Zherebtsov, K. S. Votolin, K. M. Shpakodraev, N. V. Malyshenko

引用次数: 0

Assessment of Structural Changes in Resins and Asphaltenes Depending on the Duration of Cracking Using Structural Group Analysis 利用结构群分析方法评估树脂和沥青质的结构变化取决于开裂持续时间

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700119

G. S. Pevneva, N. G. Voronetskaya, A. V. Goncharov

{"title":"Assessment of Structural Changes in Resins and Asphaltenes Depending on the Duration of Cracking Using Structural Group Analysis","authors":"G. S. Pevneva, N. G. Voronetskaya, A. V. Goncharov","doi":"10.3103/S0361521925700119","DOIUrl":"10.3103/S0361521925700119","url":null,"abstract":"Changes in the structural parameters of secondary resins and asphaltenes formed upon the cracking of asphaltenes, resins, and their mixture were assessed at different process durations. Resins and asphaltenes isolated from heavy methane oil of the Zyuzeevskoye oil field (Tatarstan) and their mixture were cracked in a batch reactor at 450°C for 60, 90, and 120 min. With increasing the duration of resin and asphaltene cracking, condensation reactions leading to an increase in the yield of coke and the formation of low-molecular-weight highly aromatic secondary resin and asphaltene molecules accelerated. It was found that the directions of thermal transformations of resin and asphaltene molecules were similar. The joint presence of resins and asphaltenes in the mixture changed the direction of their thermal transformations in the course of cracking, which was reflected in the quantitative data on the mass balance and structural parameters of secondary resins and asphaltenes formed upon the cracking of a mixture of resins with asphaltenes. Differences in the structural characteristics of resins and asphaltenes formed upon the cracking of single-component samples and their mixture were revealed.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 3","pages":"240 - 246"},"PeriodicalIF":0.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164914","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

Microstructure of Asphaltenes of Bituminous Oils 沥青质的微观结构

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700065

E. Yu. Kovalenko, T. V. Cheshkova, K. A. Cherednichenko, T. A. Sagachenko, R. S. Min

{"title":"Microstructure of Asphaltenes of Bituminous Oils","authors":"E. Yu. Kovalenko, T. V. Cheshkova, K. A. Cherednichenko, T. A. Sagachenko, R. S. Min","doi":"10.3103/S0361521925700065","DOIUrl":"10.3103/S0361521925700065","url":null,"abstract":"The microstructure and functional compositions of the asphaltenes of bituminous oils from the Ashalchinskoye (Permian), Usinskoye (Permo-Carboniferous), and Nurlatskoye (Devonian) oil fields and their high- and low-molecular-weight components were studied using infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. It was shown that asphaltenes from the Ashalchinskoye oil were characterized by a smooth surface, while asphaltenes from the Usinskoye and Nurlatskoye oils had rough and porous surfaces. The sizes of asphaltene nanoaggregates from the Usinskoye and Nurlatskoye oils were smaller than those of the Ashalchinskoye oil. At the same time, asphaltene nanoaggregates from the Ashalchinskoye and Nurlatskoye fields formed a disordered tangled structure. A distinctive feature of asphaltenes from the Usinskoye oil was the presence of more ordered layers characteristic of crystal-like formations. Asphaltenes of Ashalchinskoye and Nurlatskoye oils were characterized by increased degrees of aromaticity and branching of aliphatic substituents in their macromolecules and a high relative concentration of fragments with a sulfoxide group. Their high-molecular-weight asphaltenes were less aromatic than low-molecular-weight ones, and their composition had a lower tentative concentration of carbonyl and sulfoxide groups. In the structure of asphaltenes form the Usinskoye oil, the fraction of aliphatic fragments and fragments containing a carbonyl group was increased. High-molecular-weight asphaltenes of this oil also contained fewer sulfoxide and carbonyl groups but more aromatic fragments than their low-molecular-weight asphaltenes.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 3","pages":"204 - 211"},"PeriodicalIF":0.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164921","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

Hydrocarbon Composition of the Products of Thermal and Catalytic Cracking of Asphaltenes Obtained in Supercritical Water 超临界水中沥青质热裂化及催化裂化产物的碳氢化合物组成

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700107

Kh. V. Nal’gieva, G. S. Pevneva, N. G. Voronetskaya, M. A. Kopytov

{"title":"Hydrocarbon Composition of the Products of Thermal and Catalytic Cracking of Asphaltenes Obtained in Supercritical Water","authors":"Kh. V. Nal’gieva, G. S. Pevneva, N. G. Voronetskaya, M. A. Kopytov","doi":"10.3103/S0361521925700107","DOIUrl":"10.3103/S0361521925700107","url":null,"abstract":"The hydrocarbon composition of oils from asphaltene cracking products was studied. The experiments were carried out in three different modes: without additives (a control experiment without water and catalyst), in supercritical water without catalyst, and in supercritical water with an iron oxide–based catalyst. Cracking was carried out in a reactor at 450°C; the experiment duration was 60 min, and the catalyst was obtained in situ from iron(III) tris(acetylacetonate). Individual hydrocarbon composition of oils isolated from cracking products was determined by gas chromatography–mass spectrometry (GC–MS) analysis using a Shimadzu GCMS-QP5050A quadrupole system. The hydrocarbon composition of asphaltene cracking products obtained in supercritical water differed in qualitative and quantitative characteristics from the products obtained without water. Upon asphaltene cracking in water, the composition changed significantly compared to that in the control experiment, and an increase in the fraction of saturated hydrocarbons was noted. In cracking products obtained in an aqueous medium with the addition of a catalyst, saturated hydrocarbons also predominated, while the concentration of phthalates, alkenes, and sulfur-containing compounds increased significantly.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 3","pages":"227 - 233"},"PeriodicalIF":0.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164913","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

Comparative Evaluation of Oil-Displacing Capability of a New Chemical Composition Based on DES and Surfactants and That of the IPC-PRO Composition 基于DES和表面活性剂的新型化学组合物与IPC-PRO组合物驱油性能的比较评价

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S036152192570003X

M. R. Sholidodov, V. V. Kozlov, L. K. Altunina, A. R. Saidentsal

引用次数: 0