Solid Fuel Chemistry最新文献_第5页

Effect of Ultrasonic Treatment Conditions on the Properties of Water-in-Oil Emulsions 超声处理条件对油包水乳剂性能的影响

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700077

G. I. Volkova, E. Yu. Smirnova

{"title":"Effect of Ultrasonic Treatment Conditions on the Properties of Water-in-Oil Emulsions","authors":"G. I. Volkova, E. Yu. Smirnova","doi":"10.3103/S0361521925700077","DOIUrl":"10.3103/S0361521925700077","url":null,"abstract":"The effect of ultrasonic treatment modes on the microstructure and structural and rheological properties of oil emulsions with distilled water and formation water was studied. The emulsions were treated in an ultrasonic field (frequency, 22 kHz; intensity, 2, 6, and 18 W/cm2). The microstructure of the emulsions was analyzed using an AXIO LAB.A1 optical microscope (Carl Zeiss, Germany). The analysis of variances of the micrographs of the emulsions was performed to reveal the effect of the treatment conditions and the type of dispersed phase on the mean droplet diameter, dispersion, and position of the peak of water droplet size distribution in the emulsion. The rheological parameters of the emulsions before and after ultrasonic treatment were measured using a HAAKE Viscotester iQ rheometer (Thermo Scientific, the United States). For highly viscous oil with a high content of resin–asphaltene components, the degree of dispersion of water droplets decreased after pulsed ultrasonic treatment at a field intensity 6 W/cm2 in two modes (5 cycles with 10 s of operation and 10 s of rest; 10 cycles with 5 s of operation and 5 s of rest).","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 3","pages":"212 - 219"},"PeriodicalIF":0.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164922","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

Thermotropic Plugging Material for Strengthening Rocks and Preventing Liquid and Steam Breakthroughs in Oil Mines 石油矿山固岩防液、防汽突破的热致性封堵材料

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700016

L. K. Altunina, I. V. Kuvshinov, V. A. Kuvshinov, L. A. Stasyeva, V. V. Kozlov

引用次数: 0

Preparation of Cryogels from Aqueous Solutions of Polyvinyl Alcohol and Their Physicochemical and Rheological Properties 聚乙烯醇水溶液制备低温冰箱及其理化和流变性能

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700028

V. N. Manzhai

引用次数: 0

Changes in the Composition of Polyaromatic Hydrocarbons of Siberian Oil Shales in the Modeling of Thermal Processes 热过程模拟中西伯利亚油页岩多芳烃组成的变化

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700120

I. S. Korol’, N. A. Mukhortina, D. I. Chuikina, N. A. Krasnoyarova

引用次数: 0

Characteristics of Diesel Fuel Infiltration into Arctic Peat Soil 北极泥炭土柴油入渗特性研究

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700132

D. V. Fedorov, O. V. Serebrennikova, N. A. Krasnoyarova, E. A. Elchaninova

引用次数: 0

Colloidal Dispersion Properties of Oil Emulsions in an Electromagnetic Field 油乳剂在电磁场中的胶体分散特性

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700041

Yu. V. Loskutova, N. V. Yudina

引用次数: 0

Changes in the Molecular Structure of Asphaltenes in the Process of Tar Cracking in the Presence of Calcium Acetate 醋酸钙存在下沥青裂解过程中沥青质分子结构的变化

IF 0.9 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-06-14 DOI: 10.3103/S0361521925700089

A. V. Goncharov, E. B. Krivtsov

引用次数: 0

Microstructure Characteristics of Soft and Hard Coal and Its Influence on Gas Adsorption Capacity 软硬煤的微观结构特征及其对气体吸附能力的影响

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-03-31 DOI: 10.3103/S0361521924700605

Xianfeng Liu, Chuang Li, Baisheng Nie, Xueqi Jia, Yankun Ma

{"title":"Microstructure Characteristics of Soft and Hard Coal and Its Influence on Gas Adsorption Capacity","authors":"Xianfeng Liu, Chuang Li, Baisheng Nie, Xueqi Jia, Yankun Ma","doi":"10.3103/S0361521924700605","DOIUrl":"10.3103/S0361521924700605","url":null,"abstract":"In order to better understand the microstructure characteristics of soft and hard coal and its influence on gas adsorption capacity, three groups of soft and hard coal samples with different maturities were collected for measurements from Ordos Basin. CH4 isothermal adsorption experiments were performed to analyze the gas adsorption characteristics. Pore distribution and oxygen-containing groups of these soft and hard coals were detected by low-pressure N2 adsorption and Fourier Transform Infrared Spectroscopy (FTIR), respectively. For the collected FTIR spectrum, the peak-fitting method is used to semi-quantitatively study the distribution of oxygen-containing groups. Comparison of microstructure characteristics and methane adsorption capacity has also been made between soft and hard coal samples. The results showed that soft coals has smaller pore diameter and the micropore and mesopore surface area is 43.2–75.1 and 12.2–41.1% greater than that of corresponding hard coal, respectively, but the macropore surface area is 18.9–66.7% less than that of hard coals. The aromaticity of hard bituminous coals is smaller than that of the corresponding soft coals, while the peak areas of carbonyl and hydroxyl groups are obviously larger than that of the corresponding soft bituminous coals. However, the distribution of oxygen-containing groups in soft and hard anthracite exhibits the opposite trend. Tectonic deformation contributes to the decline of oxygen-containing groups and can enhance the maturity and pore surface area of bituminous coals, exhibiting superior methane adsorption property compared with hard bituminous coals. Though soft anthracite has developed micropore/mesopore structures, its lower maturity and higher content of oxygen-containing groups lead to the decline of gas adsorption capacity. Gas adsorption behaviors of coal are closely related to the complex microstructures, and the combined effects of physical structures and chemical groups should be taken into account.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 2","pages":"139 - 149"},"PeriodicalIF":0.8,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740699","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

Carbon Cloth with Graphene Films as Cathodic Microporous Layer in Air-Breathing Proton Exchange Membrane Fuel Cells (PEMFCs) 石墨烯膜碳布阴极微孔层在呼吸式质子交换膜燃料电池中的应用

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-03-31 DOI: 10.3103/S0361521924700575

Zihao Chen, Zitong Huang, Liangliang Sun, Junbo Wang, Hailong Xiong, Haoyu Yang, Jinwen Yang

{"title":"Carbon Cloth with Graphene Films as Cathodic Microporous Layer in Air-Breathing Proton Exchange Membrane Fuel Cells (PEMFCs)","authors":"Zihao Chen, Zitong Huang, Liangliang Sun, Junbo Wang, Hailong Xiong, Haoyu Yang, Jinwen Yang","doi":"10.3103/S0361521924700575","DOIUrl":"10.3103/S0361521924700575","url":null,"abstract":"Enhancing the performance of PEMFCs significantly depends on the efficient diffusion of gases and the transport of water molecules. In this study, we utilized the high porosity and electrical conductivity of carbon fiber to promote the autonomous growth of lotus leaf graphene along the carbon fiber substrate. This innovation enables the creation of a gas cathode microporous layer for aspirated PEMFCs, which demonstrates high structural stability, minimal mass transfer resistance, and cost-effectiveness. Efficient gas diffusion and water transport are critical, as inadequate management of these factors can negatively impact battery lifespan and stability. The PEMFC cell with Gra/CC-60 exhibits a maximum current density of 1480 mA/cm2, outperforming other samples. Additionally, the peak power density reaches 398.9 mW/cm2 at 0.43 V. Remarkably, after 12 hours of operation at high current density, the PEMFC cell shows only a 7.94% drop in current density. This research paves the way for the development of microporous layers for fuel cells, sensors, and catalytic modules, while also introducing a novel approach to the selection and design of carbon materials.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 2","pages":"155 - 163"},"PeriodicalIF":0.8,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740648","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 Content on Spontaneous Combustion Characteristics of Bituminous Coal in Wuda Coal Field 含水率对乌达煤田烟煤自燃特性的影响

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2025-03-31 DOI: 10.3103/S036152192470054X

Wenjin Zheng, Shishun Gan, Xueqi Jia, Xianfeng Liu

{"title":"Effect of Moisture Content on Spontaneous Combustion Characteristics of Bituminous Coal in Wuda Coal Field","authors":"Wenjin Zheng, Shishun Gan, Xueqi Jia, Xianfeng Liu","doi":"10.3103/S036152192470054X","DOIUrl":"10.3103/S036152192470054X","url":null,"abstract":"To investigate the influence of water content on coal combustion characteristics, bituminous coal was collected as the research target from the Wusitai Coal Mine. The combustion characteristic parameters of coal samples with various water contents were measured by cone calorimeter, and the combustion efficiency of coal samples was analyzed. The spontaneous combustion characteristics of samples are significantly affected by moisture within coal. As the rise of moisture content, the ignition time of bituminous coal is firstly reduced and then it is enhanced. The coal sample with moisture content of 10.36% has the fastest ignition. The total smoke discharge, the peak heat release rate and the flue gas generation rate of bituminous coal samples are firstly decreased, then increased and finally reduced with the increase of water content. In the later stage of combustion, the CO generation rate is the smallest for the bituminous sample with water content of 6.59%, while it is the largest for the sample with 18.78% content of moisture. Large moisture content makes the coal sample incomplete combustion, which can improve the CO production rate. The combustion efficiency of bituminous coal can be improved by the appropriate moisture content. It was found that the total CO generation rate, smoke release rate and the ignition time are effectively reduced, after setting the moisture content of 6.59–10.36% of the coal. As a result, both the combustion efficiency and heat release rate are improved.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":"59 2","pages":"104 - 110"},"PeriodicalIF":0.8,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740694","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