Solid Fuel Chemistry最新文献

{"title":"Simulation Research on Optimization and Renovation of Ventilation System of Menkeqing Mine based on TF1M3D","authors":"Shuoran Huang,&nbsp;Zongxiang Li,&nbsp;Ji Wu","doi":"10.3103/S0361521924601244","DOIUrl":"10.3103/S0361521924601244","url":null,"abstract":"<p>In order to meet the air volume demand of the south wing of Menkeqing mine during the successive mining period and ensure the safe and efficient production of the mine. On the basis of air volume survey, analysis of main ventilator performance parameters and measurement of mine ventilation resistance in the whole mine, the mine ventilation system was simulated and analyzed by using TF1M3D, a mine ventilation physical simulation platform, and the mine ventilation system was simulated and predicted in the difficult mining period of panel working in the south wing, and the ventilation system optimization and transformation schemes were proposed to meet the mining period of panel working in the south wing. The results showed that the air supply capacity of the main ventilator of the mine had reached the limit at this stage, and the zoned ventilation of the south wing air shaft and 1# air shaft can meet the air supply demand of each working face in the boundary area of the south wing of Menkeqing mine.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"526 - 533"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808764","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}

{"title":"Biochar from Slow Pyrolysis of Palm Kernel Seeds: Preparation, Characterization, and Solid Fuel Properties","authors":"Sunday E. Elaigwu,&nbsp;Vincent O. Adimula,&nbsp;Anthony U. Awode","doi":"10.3103/S0361521925600051","DOIUrl":"10.3103/S0361521925600051","url":null,"abstract":"<p>In this study, biochar was prepared by slow pyrolysis of palm kernel seeds at 350°C for 2 h. Characterization of the raw material (palm kernel seeds) and biochar was carried out by elemental analysis, FTIR, BET and SEM analyses. The results showed that the pyrolysis process transformed the palm kernel seeds, resulting in an increase in the carbon content and decrease in the hydrogen and oxygen contents of the biochar. The transformation was also obvious in the FTIR spectra, with the biochar showing peaks with less intensity than the raw material. The SEM images further confirmed the changes as the oily morphology of the raw material was not observed in the biochar, while the BET analysis showed an increase in the surface area from 3.03 m²/g in the raw material to 45.15 m²/g in the biochar. The results of the solid fuel properties showed that the higher heating value (HHV) increased from 24.04 MJ/kg in the raw material to 27.15 MJ/kg in the biochar, while the energy densification ratio was 1.13 in the biochar. The energy properties of the prepared biochar are consistent with previous studies, indicating that the biochar has the potential for development as solid fuel. Consequently, pyrolysis could be an attractive technique for converting this waste material into high value-added product.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"472 - 479"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808769","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}

{"title":"Study on Heat Transfer Behavior and Horizontal Seepage Expansion Mechanism of Liquid Nitrogen in Loose Media within Enclosed Spaces","authors":"Yang Li,&nbsp;Bing Wu,&nbsp;Laisheng Huang,&nbsp;Chao Li,&nbsp;Yang Zhang","doi":"10.3103/S0361521924601360","DOIUrl":"10.3103/S0361521924601360","url":null,"abstract":"<p>Liquid nitrogen, characterized by its extremely low temperature and high vaporization expansion ratio, plays a crucial role in fire prevention and suppression in mining goafs. However, the seepage characteristics of liquid nitrogen in loose media have not been sufficiently studied. To improve the fire prevention and extinguishing efficiency of liquid nitrogen, it is essential to gain a deeper understanding of its seepage behavior in loose media. To this end, an experimental setup for liquid nitrogen seepage was designed to quantitatively study its horizontal seepage behavior in loose media. By analyzing the changes in the temperature and pressure fields during the seepage process, the effects of angle of inclination and particle size on the seepage process were explored. Based on the Forchheimer equation, a mathematical model for the horizontal seepage of liquid nitrogen in loose media was established. The results showed that when the particle size increased from 1–2 to 3–4 cm, the permeability increased by 4.2 to 4.5 times, and the non-Darcy factor decreased by 2.8 to 4.3 times. Under the same particle size conditions, as the angle of inclination increased from 0° to 13°, the permeability increased by 1.97 to 2.06 times, and the non-Darcy factor decreased by 1.37 to 2.11 times. This study provides a theoretical basis for the application of liquid nitrogen in fire prevention and extinguishing in mine goafs.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"561 - 574"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808768","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}

{"title":"Study of the Pyrolysis Process of Spent Coffee Grounds Using Thermogravimetric Analysis","authors":"Ya. D. Pudova,&nbsp;K. O. Krysanova","doi":"10.3103/S0361521925700326","DOIUrl":"10.3103/S0361521925700326","url":null,"abstract":"<p>This paper presents the results of a comprehensive study of four types of spent coffee grounds (SCG) obtained using different coffee brewing methods. Thermogravimetric analysis (TGA) was performed to study the thermal behavior of the samples, and elemental and technical analysis was performed to assess their calorific value. The main gaseous components released during the pyrolysis of the samples were identified using Fourier transform infrared (FTIR) spectrometry. The data obtained allowed us to characterize the composition and properties of SCG as a potential raw material for energy processing.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"455 - 463"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808611","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}

{"title":"Mechanism and Effect of Surfactants on the Wettability of Anthracite Coal","authors":"Minbo Zhang,&nbsp;Ke Zhang,&nbsp;Ruiming Liu","doi":"10.3103/S036152192460127X","DOIUrl":"10.3103/S036152192460127X","url":null,"abstract":"<p>The wettability of anthracite is crucial for effective dust control in industrial dust removal processes. This study investigates the key effects of surfactants on the wettability of anthracite by compounding anionic surfactants, specifically fatty acid methyl ester ethoxylate sulfonate (FMES), with nonionic surfactants, such as coconut oil fatty acid diethanolamide (CDEA). The research analyzes the surface chemical properties and agglomeration behavior of the treated anthracite. The processed coal samples were characterized using various techniques, including infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The experimental results indicate that the anionic-nonionic composite surfactant exhibits a significant synergistic effect in enhancing the wettability of anthracite coal. SEM and EDS analyses revealed that the coal samples treated with surfactants formed liquid bridges through hydrogen bonding, which facilitated the rapid agglomeration of fine particles. The agglomeration effect of the composite surfactant system was found to be superior to that of a single surfactant. XPS testing demonstrated a reduction in carbon content, which decreased to 79.43%, while oxygen content increased to 18.15% due to the treatment with the compound surfactant. Furthermore, FTIR analysis indicated that the complex surfactant system significantly increased the hydroxyl content of the coal samples, thereby enhancing the surface adsorption effect. In summary, the synergistic effect generated by the anionic-nonionic complex surfactants can markedly improve the hydrophilicity of anthracite, providing an effective approach for optimizing its wettability.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"534 - 545"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808752","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}

{"title":"Characterization of the Pyrolysis Products of Hydrolytic Lignin and Sewage Sludge Using Pyrolytic Gas Chromatography","authors":"A. A. Gromov,&nbsp;P. D. Alekseev,&nbsp;A. P. Terekhin,&nbsp;P. A. Maryandyshev","doi":"10.3103/S0361521925600348","DOIUrl":"10.3103/S0361521925600348","url":null,"abstract":"<p>This paper presents the results of a study of the energy potential of nondesign fuels using pyrolytic gas chromatography with mass spectrometric detection (GC–MS). The test materials were samples of sewage sludge (SWS) and hydrolytic lignin (HL) collected in the Arkhangelsk oblast. The initial samples were characterized by their key physicochemical parameters. Attention was paid to an analysis of the chromatograms of pyrolysis products obtained under various temperature conditions. Key temperature ranges of maximum heat release were determined for each type of feedstock. For sewage sludge, the highest yield of high-calorific components determining peak heat release was observed in a range of 400–500°C. For hydrolytic lignin, a similar peak energy release was recorded at a significantly lower temperature of approximately 300°C due to its specific composition. A detailed identification and qualitative assessment of the main components in the pyrolysis products of both fuels was performed using GC–MS and HPLC analysis. The results of this work allowed us to evaluate the suitability of SWS and HL as feedstock for the subsequent energy utilization.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"444 - 454"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808766","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}

{"title":"Research on Prediction and Prevention of Coal Spontaneous Combustion in Goaf Based on Optimized Random Forest","authors":"Chun Zhang,&nbsp;Rongrong Wang,&nbsp;Mingming Shang","doi":"10.3103/S0361521925600580","DOIUrl":"10.3103/S0361521925600580","url":null,"abstract":"<p>This paper takes the working face of Heiyanquan Mine as the research subject. Based on the mechanism of coal self-ignition and the gas generation pattern, combined with coal oxidation and temperature rise experiments and machine learning algorithms, a prediction and early warning model for spontaneous combustion risk in goaf areas is constructed. The results show that the double-layer random forest model optimized by grid search and cross-validation has a mean absolute error (MAE) of 6.47 and a determination coefficient (R²) of 0.9845, with a prediction relative error between 0 and 5%. When the working face was advancing slowly through a fault, the model projected that the peak temperature at a depth of 72 meters in the goaf area reached 49.2°C and surpassed 40°C for five consecutive instances, indicating a spontaneous combustion risk. After calculation and numerical simulation, a prevention and control plan was determined with a nitrogen injection flow rate of 9 m³/min and a nitrogen injection port 65 meters away from the working face. During the nitrogen injection process, the system continuously predicted and warned. When the measurement point No. 4 was located at a depth of 105 meters in the goaf area, it was determined that there was no risk of spontaneous combustion, and nitrogen injection was stopped. The findings offer a scientific, accurate, and efficient method for controlling spontaneous combustion in coal mine gob areas, which helps enhance the effectiveness of fire prevention and extinguishment.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"498 - 511"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808612","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}

{"title":"Study on the Influence of Mineral Proportion in Bituminous Coal on the Evolution of Thermodynamic Parameters of CO2 Adsorption","authors":"Xiaochen Yang,&nbsp;Nan Jia","doi":"10.3103/S0361521925600385","DOIUrl":"10.3103/S0361521925600385","url":null,"abstract":"<p>Coal is a complex mixture consisting of organic macerals and minerals. The presence of minerals can give rise to variations in the macromolecular structure of coal, modify its pore structure, and subsequently influence the coal’s adsorption capacity. Taking bituminous coal and kaolinite minerals as the research subjects, this study quantitatively investigated the impact of kaolinite and its content on the adsorption properties of bituminous coal using the molecular dynamics method. Moreover, the pore characteristics and adsorption energy of bituminous coal under different mineral contents were analyzed to uncover the underlying microscopic mechanism.The results demonstrate that as the mass fraction of kaolinite increases, the total volume, free volume, and porosity of the coal macromolecules composed of bituminous coal and kaolinite all increase. Additionally, with an increase in the kaolinite mass fraction, the adsorption capacity of CO₂ also rises. The adsorption heat ranges from 24.57 to 32.97 kJ/mol under different mass ratios, and it increases in tandem with the growth of the adsorption capacity. As the mass fraction of the minerals increases, the peak value of the radial distribution function between bituminous coal and kaolinite goes up, indicating that the probability and interaction intensity of CO₂ molecules surrounding bituminous coal molecules increase with the rise in mineral content. Kaolinite molecules exhibit a strong interaction with CO₂, and CO₂ molecules are more densely packed within the kaolinite-containing structures compared to those in bituminous coal. Under the same time conditions, the self-diffusion coefficient of CO₂ molecules in the kaolinite-containing structure is higher than that in the bituminous coal structure, suggesting that the adsorbed gas in the kaolinite-containing structure is more stable. Furthermore, as the quantity of kaolinite increases, the porosity grows, and the self-diffusion coefficient of CO₂ molecules also increases.This research offers a theoretical reference for coalbed methane (CBM) exploitation and carbon sequestration.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"480 - 486"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808770","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}

{"title":"Study on the Influence of Intrinsic and Associated Pyrite on Spontaneous Combustion of Anthracite","authors":"Xueming Li,&nbsp;Ying Zhao,&nbsp;Gang Bai,&nbsp;Jun Zhao,&nbsp;Juan Ran","doi":"10.3103/S0361521925700338","DOIUrl":"10.3103/S0361521925700338","url":null,"abstract":"<p>The anthracite in Yangquan mining area contains intrinsic pyrite, and there is a considerable content of associated pyrite in the coal seam, which are easy to cause coal spontaneous combustion and seriously restricts the mine safety. In order to study the influence of intrinsic pyrite and associated pyrite on coal spontaneous combustion, the different contents of intrinsic pyrite in coal were removed by physical flotation and the associated pyrite was added to desulfurized coal. The synchronous thermal analysis and temperature-programmed chromatography were used to determine the difference of two kinds of pyrite on coal spontaneous combustion. The results suggested that with the increase of intrinsic pyrite content in coal, the characteristic temperature of coal decreases, the weight gain, the heat release increases and the release of SO₂ increase, and the index gas production and activation energy also show an increasing trend. When the associated pyrite is added to the coal with the lowest intrinsic pyrite content (WK15-4), the weight, heat release and index gas release intensity also show an increasing trend, while the characteristic temperature decreases. The comparison shows that both AP and intrinsic pyrite of coal can promote coal spontaneous combustion, but the ability of AP to promote coal spontaneous combustion is stronger than that of intrinsic pyrite.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"546 - 560"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808767","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}

{"title":"Evolution of Technological Processes for the Production of Higher Fatty Alcohols from Natural and Petrochemical Raw Materials: History and Prospects (A Review)","authors":"N. V. Ivanov,&nbsp;P. A. Konkin,&nbsp;M. A. Kozlov,&nbsp;E. O. Pentsak","doi":"10.3103/S0361521925600890","DOIUrl":"10.3103/S0361521925600890","url":null,"abstract":"<p>Beginning in the 1930s, a number of technological processes were developed to saturate the market with affordable detergents; these processes are still used today, almost a century later. While various fractions of hydrogenated vegetable oils and spermaceti from cetaceans were initially used as raw materials for soap production, the use of petrochemical raw materials began in the mid-20th century largely due to the efforts of the scientific community and the development of chemical technologies and organic synthesis. To date, a number of methods have been introduced or are close to being introduced into industry: hydrogenation, the Bouveault–Blanc method, the Bashkirov method, the SHOP process, and the Ziegler process, and technologies for the biosynthesis of higher fatty alcohols from gas-chemical feedstocks. This paper aimed to summarize the accumulated experience of science and industry, observe currently available methodological approaches to the synthesis of higher fatty alcohols from various raw materials, demonstrate the advantages and disadvantages of these approaches, and outline the prospects for the use of higher fatty alcohols and by-products of their synthesis in the Russian Federation.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 6","pages":"427 - 443"},"PeriodicalIF":0.9,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808609","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}