Solid Fuel Chemistry最新文献_第3页

Experimental and Simulation Study on Ventilation Heat and Humidity Damage in Deep Mining 深部采矿通风热湿损害试验与模拟研究

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-09-26 DOI: 10.3103/S0361521924700307

Zongxiang Li, Yan Liu, Hongjie Zhang, Nan Jia

{"title":"Experimental and Simulation Study on Ventilation Heat and Humidity Damage in Deep Mining","authors":"Zongxiang Li, Yan Liu, Hongjie Zhang, Nan Jia","doi":"10.3103/S0361521924700307","DOIUrl":"10.3103/S0361521924700307","url":null,"abstract":"To study the problem of predicting and preventing high-temperature heat damage in deep mining of mines. The heat exchange and mass exchange algorithms of the ventilation network parting wind and surrounding rock are applied, and the model of the heat exchange coefficient of the wind flow in the drenching tunnel is adopted. TF1M3D simulation platform is developed by the College of Safety Science and Engineering of Liaoning Technical University. It is a dynamic disaster simulation software that visually and dynamically reflects the disaster spread and evolution in the ventilation system during the occurrence of major disasters in mines. Based on the theory of mass-energy active wind network, TF1M3D simulation platform can solve the problems of heat and humidity exchange, heat and mass transfer numerical calculation and so on.@Combined with the engineering example of Daqiang Mine, the algorithm is incorporated into the mine network domain system, and TF1M3D is used on the MATLAB platform to simulate and solve the temperature of the wind flow of the whole mine network domain system, and predict the temperature of the 0306 working face of Daqiang Coal Mine and put forward the simulation program of refrigeration cooling. The simulation results show that the maximum temperature of the future 3106 working face of Daqiang coal mine reaches 34.6°C, and the heat damage problem is serious. In the adopted cooling program, two refrigeration units are preferred to four refrigeration units, and the effective temperature control range of the two 250 kW refrigeration units is from 25 to 305 m, while the cooling meets the temperature of the working face airflow below 30°C. The results show that the method can accurately predict the temperature of the wind flow after cooling and the location of the cooling source, which provides a basis for the scientific development of the cooling program.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414068","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

Synthesis of Carbon–Carbon Composites Based on Anthracite of the Gorlovskii Basin 基于戈尔洛夫斯基盆地无烟煤的碳-碳复合材料的合成

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700113

A. A. Vedyagin, I. V. Mishakov

引用次数: 0

Quantitative Characterization and Macromolecular Structure Model Construction of Taixi Anthracite as Raw Material of Coal-Based Activated Carbon 煤基活性炭原料太西无烟煤的定量表征与大分子结构模型构建

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700204

Shanxin Xiong, Fengyan Lv, Nana Yang, Yukun Zhang, Xueni Zhao, Juanjuan Liu, Yangbo Xu, Chenxu Wang, Xiaoqin Wang, Zhen Li, Jianwei Xu

{"title":"Quantitative Characterization and Macromolecular Structure Model Construction of Taixi Anthracite as Raw Material of Coal-Based Activated Carbon","authors":"Shanxin Xiong, Fengyan Lv, Nana Yang, Yukun Zhang, Xueni Zhao, Juanjuan Liu, Yangbo Xu, Chenxu Wang, Xiaoqin Wang, Zhen Li, Jianwei Xu","doi":"10.3103/S0361521924700204","DOIUrl":"10.3103/S0361521924700204","url":null,"abstract":"In this article, we mainly completed the related research on the establishment of organic macromolecular structure model of Taixi anthracite as coal-based activated carbon precursor. The understanding of coal macromolecular structure is of great significance to clean and materialized utilization of coal. In this paper, the aromatic structure, aliphatic structure and heteroatomic structure of Taixi anthracite were characterized by 13C-NMR, FTIR and XPS. The macromolecular structure of coal was modeled by linking polycyclic aromatic hydrocarbons through bridging bonds (–CH2–, –CH–) and attaching oxygen/nitrogen functional groups. The molecular formula was determined to be C222H119NO11. The 13C-NMR simulation curve of the two-dimensional macromolecular model was in good agreement with the experimental curve. Through molecular mechanics (MM) and molecular dynamics (MD) optimization, the bond elastic energy (EB) and Van der Waals energy (EVAN) decrease greatly, which mainly lead to the acquisition of the three-dimensional energy minimum conformation. In addition, the density simulation result of 3D structural model with periodic boundary conditions is 1.37 g/cm3. This is close to the measured density, which confirm that the 3D structure is reasonable. The establishment of this model helps to further understand Taixi anthracite, which is beneficial to guide the preparation of activated carbon from Taixi anthracite.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931947","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

Improving Efficiency of Flotation for Tavantolgoi Coal after Interplay Combination Ultrasonic and Electrolysis 超声波和电解相结合提高塔万托勒盖煤的浮选效率

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700198

Ariyasuren Purevdorj, Erdenechimeg Dolgor, Tugsuu Tserendorj

{"title":"Improving Efficiency of Flotation for Tavantolgoi Coal after Interplay Combination Ultrasonic and Electrolysis","authors":"Ariyasuren Purevdorj, Erdenechimeg Dolgor, Tugsuu Tserendorj","doi":"10.3103/S0361521924700198","DOIUrl":"10.3103/S0361521924700198","url":null,"abstract":"The Tavantolgoi coal deposit used in our study is one of the largest deposits and belongs to coking coal of the Permian age. Technical properties of each layer of coal in Ukhaa Khudag of the Tavantolgoi deposit were determined and compared. This study was carried out by selecting coal from layer 4C, which has the lowest calorific value of economically important layers. Sieve analysis of the coal samples was carried out to select the ultra-fine or ˂0.25 mm particle size fraction, and three different methods of flotation enrichment were conducted and compared. In this, conventional flotation, flotation after interplay of ultrasonic vibration and flotation after interplay combined with ultrasonic with electrolysis were carried out, respectively. As a result of the experiment, the best result was the coal concentrate with 6078k Cal/kg calorific value and 25.65% ash content of flotation after interplay of ultrasonic vibration combined with electrolysis. Therefore, we have determined the suitable experimental conditions for the further application of ultrasonic vibration in combination with electrolysis. We determined that the ultrasonic vibration time of 20 min, the amount of ethanol of 30 ml, and the electrolysis power of 1.5 A are suitable condition because the ash content of the floating concentration is the lowest, 24.1%, and the caloric content was the highest (6264 kcal/kg).","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932001","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

Concentrations of Persistent Organochlorine Pollutants in Peatlands of the Arkhangelsk Oblast 阿尔汉格尔斯克州泥炭地中的持久性有机氯污染物浓度

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700137

I. N. Zubov, S. B. Selyanina, A. V. Velyamidova, E. S. Kolpakova, A. S. Orlov

{"title":"Concentrations of Persistent Organochlorine Pollutants in Peatlands of the Arkhangelsk Oblast","authors":"I. N. Zubov, S. B. Selyanina, A. V. Velyamidova, E. S. Kolpakova, A. S. Orlov","doi":"10.3103/S0361521924700137","DOIUrl":"10.3103/S0361521924700137","url":null,"abstract":"A study was conducted to assess the concentrations of persistent organochlorine pollutants (POPs) in high-moor peats of the Primorsky and Mezensky districts of the Arkhangelsk oblast. Peat deposits located in the zone of potential influence of pollutants and outside it were analyzed. Based on the results of chromatographic determination, data on the concentrations of some organochlorine compounds in the studied peats, in particular, persistent toxic hexachlorobenzene (HCB), pentachlorophenol (PCP), pentachloroanisole (PCA), and chlorinated phenols and their derivatives, were obtained. Target POPs were detected in all analyzed peat samples with noticeable variability in their concentrations across the study areas HCB (0.4–3.2 ng/g), PCP (0.2–1.8 ng/g), and PCA (up to 0.4 ng/g). The CP content of the studied peats varied over a wider range from 1.2 to 571 ng/g. The identified quantities of POPs (HCB, CP, and PCA) were most likely due to the entry of pollutants by atmospheric transport from various sources in the territories of nearby regions and neighboring states. The influence of local pollution sources associated with thermal processes should also be taken into account.: ","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932009","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

Selective Hydrogenation of Carbon Oxides in the Presence of a Nickel-Containing Catalyst on a Secondary Biomass Substrate 含镍催化剂在二次生物质底物上选择性氢化氧化碳

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700150

I. S. Chemakina, M. I. Ivantsov, A. V. Elyshev, M. V. Kulikova

引用次数: 0

Rheological Characteristics of High Ash Indian Coal with Sodium Dodecyl Sulfate as Additive 添加了十二烷基硫酸钠的高灰分印度煤的流变特性

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700216

Akash Pandey, Dulari Hansdah, Satish Kumar

{"title":"Rheological Characteristics of High Ash Indian Coal with Sodium Dodecyl Sulfate as Additive","authors":"Akash Pandey, Dulari Hansdah, Satish Kumar","doi":"10.3103/S0361521924700216","DOIUrl":"10.3103/S0361521924700216","url":null,"abstract":"The conveyance of coal in slurry form through pipelines has demonstrated its viability and efficacy, providing economic advantages, reliability and reduced environmental impact. As high-rank coal deposits are steadily depleting, researchers are interested in exploring ways to facilitate utilising low-rank coal to meet the global energy demand. However, the slurry prepared using low-rank coal exhibits high apparent viscosity and poor stability. In the present work, the rheological characteristics of Indian coal with an ash content of more than 50% are improved through the use of the commercial additive sodium dodecyl sulfate. The high ash coal sample’s physical, chemical, and morphological characteristics were assessed. The rheological attributes of the high ash coal slurry were investigated by altering the shear rate, solid loading, and additive concentration. The optimal sodium dodecyl sulfate proportion to obtain slurry with maximum stability and low apparent viscosity was found to be 0.5%. The observed rise in the absolute value of zeta potential from –37.82 to –52.19 mV signifies that suspension stabilization occurs via electrostatic repulsion. A statistical correlation for the prediction of slurry apparent viscosity was developed and proved to be promising and significant.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932003","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

Analysis of the Natural Hazard of the Mining Void Zone Based on Incomplete Collapse of the Roadway in the Return Mining 基于回采巷道不完全坍塌的采空区自然灾害分析

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700228

Zongxiang Li, Wenshuo Sun, Dongjie Hu, Yuhang Li

{"title":"Analysis of the Natural Hazard of the Mining Void Zone Based on Incomplete Collapse of the Roadway in the Return Mining","authors":"Zongxiang Li, Wenshuo Sun, Dongjie Hu, Yuhang Li","doi":"10.3103/S0361521924700228","DOIUrl":"10.3103/S0361521924700228","url":null,"abstract":"Determining the risk of spontaneous combustion of coal remains in the airspace is crucial to the safe production of mines. Therefore, to investigate the danger of spontaneous combustion in the airspace when the overlying rock layer is not sufficiently compacted, the 1304 working face of Hongyang no. 2 Mine was taken as the research object. The experimental device was developed to measure the oxygen consumption rate, and the negative exponential function model was used to analyze the change rule of the oxygen volume fraction of the coal samples. Combined with a large amount of measured data of the working face and the change of the wind speed of the inlet and return tunnel, a CFD model of the ground without subsidence of the bubbling medium of the mining airspace was established, and numerical simulation was carried out on the flow field of the working face’s airspace area by using FLUENT software to get the oxygen volume fraction distribution law of the airspace area distribution law. The results show that the continuous oxygen consumption rate of the coal sample is γ = 9.3381 × 10–7 mol/(m3 s). Then, the oxygen volume fraction of choking (critical) under the actual temperature is 14.4%. The maximum range of the spontaneous combustion oxidation zone in the goaf is 25 to 176 m away from the working face. The work safety advancement rate is 1.86 m/d, and the actual advancement speed is 9.6 m/d, which also presents a lower risk of spontaneous combustion. The on-site test data matches well with the simulation results, which verifies the validity of the simulation and provides a basis for the prevention and control of spontaneous combustion of the coal left in the mining area to ensure the safe production of the mine.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932005","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

Study on the Influence of Phase Change Process on the Desorption Characteristics of Gas-Containing Anthracite in Phase Change Heat Storage Materials 相变过程对相变蓄热材料中含气无烟煤解吸特性的影响研究

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700186

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

{"title":"Study on the Influence of Phase Change Process on the Desorption Characteristics of Gas-Containing Anthracite in Phase Change Heat Storage Materials","authors":"Rui Zhou, Xianfeng Liu, Xueqi Jia, Baisheng Nie, Yankun Ma, Chuang Li","doi":"10.3103/S0361521924700186","DOIUrl":"10.3103/S0361521924700186","url":null,"abstract":"The slow desorption rate of coal body gas is easy to cause coal and gas outburst accidents, the temperature has an important influence on the desorption process of gas, and increasing the temperature can significantly improve the gas desorption rate. Based on this law, inorganic phase-change energy storage materials with a phase change temperature of 58°C were selected to study the influence range of the phase change process of materials with different contents on the temperature of coal body by comparative experiments. At the same time, the effect of the change of temperature on the desorption amount and desorption rate of gas desorption within coal was obtained by applying the phase change material to the adsorption/desorption experimental system. It was found that after the addition of the phase change material, the gas-containing coal which had completed the desorption process restarted to desorb the gas, and the final stabilized desorption amount was 1.709 cm3/g with an increase of 0.185 cm3/g, accounting for 12.14% of the desorption amount under normal conditions, which indicates that the addition of phase change materials can improve the desorption rate of coal samples.","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932008","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

The Influence of Pretreatment of Carbon Support on the Catalytic Activity of Fe–Cr Oxide Systems in the Oxidative Dehydrogenation of Ethane 碳支持物预处理对氧化铁-氧化铬体系在乙烷氧化脱氢过程中催化活性的影响

IF 0.8 4区工程技术

Solid Fuel Chemistry Pub Date : 2024-08-07 DOI: 10.3103/S0361521924700149

I. I. Mishanin, T. V. Bogdan, V. I. Bogdan

引用次数: 0