Coke and Chemistry最新文献_第9页

Experimental Study on High Sulfur Coking Coal and Polypropylene under Simulated Coking 高硫炼焦煤及聚丙烯模拟焦化试验研究

IF 0.5

Coke and Chemistry Pub Date : 2025-08-25 DOI: 10.3103/S1068364X25600551

Yonggen Peng, Bin Yang, Jiayun Dan, Weijing Guo, Shijie Wang

{"title":"Experimental Study on High Sulfur Coking Coal and Polypropylene under Simulated Coking","authors":"Yonggen Peng, Bin Yang, Jiayun Dan, Weijing Guo, Shijie Wang","doi":"10.3103/S1068364X25600551","DOIUrl":"10.3103/S1068364X25600551","url":null,"abstract":"<div><p>With the increasing shortage of high-quality coking coal resources, the efficient conversion and utilization of high-sulfur coking coal has become the focus of current research. At the same time, traditional plastic waste treatment methods are facing severe environmental challenges. In this study, the migration and transformation of morphological sulfur and its structural evolution of semi-coke during the co-pyrolysis of polypropylene (PP) and high-sulfur coking coal were investigated by simulated coking experiments. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy (Raman) were used to systematically analyze the effect of PP on the sulfur migration and transformation and carbon structure order of semi-coke. The experimental results show that the introduction of PP significantly changes the pyrolysis characteristics of coal. On the one hand, PP reduces the bond property of coal, which is manifested by the decrease of bond index (G) and the maximum thickness of glial layer (Y), and leads to the decrease of semi-coke yield. On the other hand, Raman spectroscopy analysis showed that the <i>I</i><sub>D</sub>/<i>I</i><sub>G</sub> ratio of the co-pyrolysis product semi-coke increased, while the full width at half maximum (FWHM-G) of the G peak decreased, confirming that the addition of PP made the semi-coke carbon structure tend to be disordered. More importantly, the addition of PP did not show a single promotion effect on the sulfur change behavior during the pyrolysis of JM and FM. With the increase of PP addition ratio, the desulfurization of semi-coke increased first and then decreased. XPS analysis reveals that PP has a regulatory effect on the sulfur migration path: during the co-pyrolysis process, PP promotes the formation of sulfides and reduces the proportion of thiophene sulfur. This finding provides a new theoretical basis for the clean utilization of high-sulfur coal.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 5","pages":"459 - 468"},"PeriodicalIF":0.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 the Fractional Composition of Unoxidized Coal on Its Radical Structure 未氧化煤组分对其自由基结构的影响

IF 0.5

Coke and Chemistry Pub Date : 2025-08-25 DOI: 10.3103/S1068364X25600605

N. S. Zakharov, S. A. Semenova, S. A. Sozinov, Yu. F. Patrakov

引用次数: 0

Quality Assessment of Coal by Reflectogram Analysis 用反射图分析法评价煤的质量

IF 0.5

Coke and Chemistry Pub Date : 2025-08-25 DOI: 10.3103/S1068364X25600617

E. N. Kozyreva

引用次数: 0

Energy Efficiency Evaluation and Analysis of 7.63 m Coke Ovens 7.63 m焦炉能效评价与分析

IF 0.5

Coke and Chemistry Pub Date : 2025-08-25 DOI: 10.3103/S1068364X25600587

Mingjie Gao, Shijie Wang, Tiejun Yan, Lei Bi, Hongming Fang, Jian Zhou

{"title":"Energy Efficiency Evaluation and Analysis of 7.63 m Coke Ovens","authors":"Mingjie Gao, Shijie Wang, Tiejun Yan, Lei Bi, Hongming Fang, Jian Zhou","doi":"10.3103/S1068364X25600587","DOIUrl":"10.3103/S1068364X25600587","url":null,"abstract":"<div><p>This study adopted the tube-in-tube method combined with infrared thermometer to conduct online continuous temperature measurement on a 7.63 m coke oven. The system obtained key thermal parameters such as the center temperature of the coke cake, the lateral temperature, the temperature of the top space of the oven, and the temperature of the raw gas. Based on material balance and heat balance calculations, the thermal efficiency and heat consumption of the coke oven were evaluated, and the heat distribution and operation status of the coke oven were analyzed in depth. The research results indicated that there is still some room for optimization in terms of uniformity of heating, combustion efficiency, and heat loss of the coke oven. In response to potential problems, corresponding optimization and improvement suggestions were proposed to improve the thermal efficiency of the coke oven, reduce energy consumption, and ultimately achieve the goals of energy conservation and emission reduction and ultimate energy efficiency. This research provided data support and technical references for the refined management and energy efficiency improvement of large coke ovens.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 5","pages":"482 - 492"},"PeriodicalIF":0.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Initiation of Oxidation in Aqueous Solutions by Cold Plasma from a Corona Electric Discharge 电晕放电冷等离子体引发水溶液氧化的研究

IF 0.5

Coke and Chemistry Pub Date : 2025-08-25 DOI: 10.3103/S1068364X25600447

I. M. Piskarev, N. A. Aristova, I. I. Vasina, I. P. Ivanova

{"title":"Initiation of Oxidation in Aqueous Solutions by Cold Plasma from a Corona Electric Discharge","authors":"I. M. Piskarev, N. A. Aristova, I. I. Vasina, I. P. Ivanova","doi":"10.3103/S1068364X25600447","DOIUrl":"10.3103/S1068364X25600447","url":null,"abstract":"<div><p>A possible new method for the generation of ozone–hydroxyl mixtures is considered: the use of cold plasma from a corona electric discharge between a point electrode and a plane, with negative voltage at the point electrode. Discharges in air and in water vapor are considered. The lifetime of hydroxyl radicals in these conditions is ~0.12 s; ozone is consumed in sustaining the hydroxyl radicals. The parameters of the power supply circuit for the point electrodes is considered. As an example, the functional configurations of a closed generator (volume of liquid to be treated 50 mL; total discharge current 0.5 mA), a flow-type reactor (discharge current 5 mA; productivity 250 L/h), and a circulatory reactor productivity 25–250 L/h) are presented. The circulatory system permits increase in the dose created in the liquid by decrease in productivity of the water. The energy consumption in generating a single hydroxyl radical in the corona discharge is around 500 eV. It is not economically expedient to process extremely polluted water. To remove impurities that are hard to break down, treatment with ozone–hydroxyl mixture is preceded by regular water treatment. For each reactor, the doses created in the liquid are determined. The advantages and disadvantages of each system are compared.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 5","pages":"446 - 450"},"PeriodicalIF":0.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Factors Affecting the Bioleaching of Scandium from Fly Ash and Slag 粉煤灰和炉渣中钪生物浸出的影响因素

IF 0.5

Coke and Chemistry Pub Date : 2025-08-25 DOI: 10.3103/S1068364X25600666

T. M. Sabirova, V. A. Snegirev

引用次数: 0

Thermal Analysis of Lignite, Lignin, and Their Mixtures in an Oxidizing Atmosphere 氧化气氛中褐煤、木质素及其混合物的热分析

IF 0.5

Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600526

A. V. Zhuikov, A. I. Matiushenko, V. I. Panfilov, A. I. Avlasevich, S. G. Stepanov, P. N. Kuznetsov

{"title":"Thermal Analysis of Lignite, Lignin, and Their Mixtures in an Oxidizing Atmosphere","authors":"A. V. Zhuikov, A. I. Matiushenko, V. I. Panfilov, A. I. Avlasevich, S. G. Stepanov, P. N. Kuznetsov","doi":"10.3103/S1068364X25600526","DOIUrl":"10.3103/S1068364X25600526","url":null,"abstract":"<div><p>The utilization of industrial biomass waste is a priority today. A promising approach is the combustion of biomass with traditional fuels. In the present work, the combustion of lignite and lignin is investigated, with slow heating. Mixtures containing 25, 50, and 75 wt % lignin are considered; the particle size is 100–200 μm. The lignite and lignin are subjected to technical and elemental analysis. Thermal analysis is employed in experiments with heating at 10°C/min an oxidative medium (air flow rate 50 mL/min). By thermal analysis, the heating process may be divided into three stages: removal of moisture and sorbed and occluded materials; thermal decomposition, with the emission and combustion of volatiles; and ignition and combustion of the carbon residue. The basic combustion parameters for the carbon residue are determined from the results of thermal analysis: the ignition and combustion temperatures; the maximum rate of mass loss and the corresponding temperature; and the combustion index. It is established that the ignition temperature of the carbon residue is 15% lower for lignin than for lignite. Therefore adding 25% lignin to lignite lowers the ignition point by 12%. The interaction of the fuel components that synergetically affect the combustion intensity is also analyzed. The results may be used in converting coal-fired boilers for the combustion of lignite–biomass mixtures.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"366 - 373"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on Co-Combustion of Anthracite and Bituminite Based on Non-Isothermal Thermogravimetric Test 基于非等温热重试验的无烟煤与烟煤共燃研究

IF 0.5

Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600459

Xue-peng Mu, Qing-hai Pang, Da-wei Zhang, Chuan-rong Wang, Yi Zhang, Hong-zhuang Gao

{"title":"Investigation on Co-Combustion of Anthracite and Bituminite Based on Non-Isothermal Thermogravimetric Test","authors":"Xue-peng Mu, Qing-hai Pang, Da-wei Zhang, Chuan-rong Wang, Yi Zhang, Hong-zhuang Gao","doi":"10.3103/S1068364X25600459","DOIUrl":"10.3103/S1068364X25600459","url":null,"abstract":"<p>The cross-scale mechanism by which individual coal structures govern blended coal combustion behavior is systematically elucidated through non-isothermal thermogravimetric kinetic experiments integrated with Fourier-transform infrared spectroscopy analysis. Three anthracites and six bituminous coals were selected, with gradient-blending protocols designed based on a 20 wt % volatile matter threshold. Combustion kinetics were decoupled using the volume model, unreacted core model, and random pore model, complemented by scanning electron microscopy to characterize microstructural evolution. Results demonstrate that aliphatic side chains and oxygen-containing functional groups dominated the release of volatile between 250 to 450°C, with pyrolysis activation energy reduced by 56% as short-chain alkane proportions increase in blended fuels. In temperature range between, 450 and 700°C, kinetic continuity during fixed carbon oxidation is governed by synergistic interactions between aromatic condensation degrees and carbon structural order parameters, mediated through pore topology evolution and ash-layer diffusion limitations. Notably, in the DZX experimental group with a 1 : 1 blend ratio of anthracite X and bituminous Z, electron delocalization within aromatic condensation systems induced a leftward shift of combustion profiles, achieving a reduced burnout temperature of 680°C, thereby demonstrating structural complementarity of functional groups that transcends thresholds of traditional blending theories. By establishing a multiscale correlation framework integrating functional group-directed reorganization, pore topology evolution, and combustion kinetic response, this work delineates a quantitative structure-activity relationship between coal molecular units and macroscopic combustion performance, providing a molecular compatibility-driven theoretical foundation for optimizing industrial blended coal efficiency.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"382 - 395"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coke Production from the Anthracene Fraction of Coal Tar 煤焦油蒽馏分制焦炭

IF 0.5

Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600502

N. T. Smagulova, Zh. K. Karibekov, B. M. Iskakbai

引用次数: 0

Influence of Manufacturing Pressure on Properties of Sawdust–Lignite Pellets 制造压力对木屑-褐煤球团性能的影响

IF 0.5

Coke and Chemistry Pub Date : 2025-07-21 DOI: 10.3103/S1068364X25600538

V. V. Dorokhov, G. S. Nyashina, D. K. Shvedov

{"title":"Influence of Manufacturing Pressure on Properties of Sawdust–Lignite Pellets","authors":"V. V. Dorokhov, G. S. Nyashina, D. K. Shvedov","doi":"10.3103/S1068364X25600538","DOIUrl":"10.3103/S1068364X25600538","url":null,"abstract":"<div><p>The influence of the manufacturing pressure and the composition of pellets based on sawdust and assorted wastes and low-grade fuels on their density and mechanical characteristics (impact strength, hardness, resistance to vibrational loads) is studied experimentally. The specific additives employed are lignite, straw, and cardboard; in each case, 30 wt % of this component is added. With increase in manufacturing pressure and the use of those additives, the sample density may be increased from 2 to 8%. The pellet composition has a greater influence than the manufacturing pressure on the pellets’ characteristics. Adding cardboard increases the impact strength by 0.3–2.6%. Likewise, at fixed manufacturing pressure, the hardness increases by a factor of 1.5–2.9 on adding cardboard or lignite. The best resistance to vibrational loads is observed for sawdust pellets with no additive. The experiments show that 400 MPa is the optimal manufacturing pressure in terms of density, impact strength, hardness, and resistance to vibrational loads. The experimental results may be used in developing technologies for the production and combustion of pelletized fuels consisting of biomass and industrial waste.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 4","pages":"374 - 381"},"PeriodicalIF":0.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0