Coke and Chemistry最新文献

{"title":"Improving Coke Production at Severstal","authors":"E. V. Karunova,&nbsp;O. A. Kalko,&nbsp;V. L. Vikulov","doi":"10.3103/S1068364X25600964","DOIUrl":"10.3103/S1068364X25600964","url":null,"abstract":"<p>The best available technologies for coke production in Russia and elsewhere are briefly analyzed and the most promising is selected, with a view to producing coke with high coke strength after reaction <i>CSR</i> from batch containing low-value coal. For the example of Severstal coke plant, it is shown that stamp charging of the coal batch increases the hot strength of coke by a factor of 1.14 relative to traditional gravitational charging and permits the use of up to 60% of low-value coal in the batch to produce coke with <i>CSR</i> no lower than 50%.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 8","pages":"727 - 731"},"PeriodicalIF":0.5,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561694","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}

{"title":"Selecting a Technology for Naphthalene Removal from Coke Oven Gas: Absorption Stage","authors":"V. I. Ekgauz,&nbsp;A. V. Sablin,&nbsp;K. V. Pokryshkin,&nbsp;E. O. Savina","doi":"10.3103/S1068364X25600976","DOIUrl":"10.3103/S1068364X25600976","url":null,"abstract":"<p>Analysis of the equilibrium naphthalene concentrations over coal tar, its absorbent fraction, and petroleum-based absorbent oil shows that thorough removal of naphthalene from coke oven gas requires an absorbent—whether petroleum- or coal-based absorbent oils—with low initial naphthalene concentration and low absorption temperatures.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 8","pages":"732 - 741"},"PeriodicalIF":0.5,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561651","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}

{"title":"Dynamics of Phenol Absorption by Activated Carbon","authors":"A. V. Suslikov,&nbsp;B. S. Zhirnov,&nbsp;F. R. Murtazin,&nbsp;F. R. Oparina,&nbsp;P. V. Kugatov,&nbsp;D. A. Burchak,&nbsp;L. A. Ishkinina","doi":"10.3103/S1068364X25600988","DOIUrl":"10.3103/S1068364X25600988","url":null,"abstract":"<p>The dynamics of phenol absorption from aqueous solution on AG-3 activated carbon is studied. Breakthrough curves—showing the time dependence of the relative concentration—are determined experimentally for different thicknesses of the immobile carbon layer and flow rates of the phenolic water. The mathematical model proposed to describe these curves is an equation with a hyperbolic tangent. The sorptional equilibrium constant for phenol at activated carbon is found (<i>K</i> = 3.472 × 10^–4 m^–1). In modeling the dynamic adsorption of phenol, the range of the permissible hypothetical flow rate in the sorption system is determined: 2.9–10.8 m/h. The influence of this factor on the process is demonstrated.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 8","pages":"742 - 748"},"PeriodicalIF":0.5,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561693","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}

{"title":"Effect of Different Coking Coal Functional Groups Structure on Caking Property","authors":"Yan Peng,&nbsp;XinTing Liu,&nbsp;Yinping Cao,&nbsp;XiaoYong Zhang,&nbsp;DaiLin Zhang","doi":"10.3103/S1068364X25600824","DOIUrl":"10.3103/S1068364X25600824","url":null,"abstract":"<p>The caking property is a prerequisite and essential condition for coal to form coke. Investigating the impact of different functional group structures in coking coal on its caking property would be help to optimize coal blended, while the functional group structures of coal samples was used to characterize through Fourier transform infrared spectroscopy (FT-IR). The changes in these structures were investigated on eight coking coals of varying degrees of metamorphism during high-temperature pyrolysis in this paper. The peak fitting of infrared spectra was used to derive the structural parameters of the functional groups in the coal. Multivariate linear regression was then employed to analyze the correlation between different functional group structures and caking property (<i>G</i> value). The results demonstrated that the infrared parameters aromatic hydrogen rate (<span>(f_{{{text{ar}}}}^{{text{H}}})</span>), aromatic carbon rate (<span>(f_{{{text{ar}}}}^{{text{C}}})</span>), aromaticity (AR), the degree of aromatic ring condensation (DOC), and the length of the aliphatic chain or the branching degree of aliphatic chains (F) increased, when the longer aliphatic chains would break down into more short aliphatic chains during pyrolysis. Multivariate linear regression analysis revealed that the caking property <i>G</i> value of coking coal could be primarily determined by the length of the aliphatic chain or the branching degree of aliphatic chains, with secondary factors being the content of hydrogen bonds and aliphatic content. A higher aliphatic side chains content, primarily short aliphatic chains, a high degree of branching, and a significant amount of hydrogen bonds would be beneficial for generating more plastic layer, thereby enhancing the coal’s caking property. Therefore, the established regression model indicated that when the relative content of aliphatic groups in coking coal was around 0.50–0.65, the degree of branching was around 2.0, and the relative content of hydrogen bonds was between 1.5–4.0, the coal caking property <i>G</i> value was between 65~80, which could guide coal blending and coking from the perspective of coal molecular functional group structure.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 7","pages":"671 - 679"},"PeriodicalIF":0.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145533181","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}

{"title":"Reduction of Iron Oxides in the Fe–Pt/C System with Thermocatalytic Decomposition of Carbon Substrates: Thermogravimetric and Mass Spectrometric Analysis","authors":"N. S. Zakharov,&nbsp;A. N. Popova,&nbsp;G. Yu. Simeniuk,&nbsp;I. Yu. Zykov","doi":"10.3103/S1068364X25600903","DOIUrl":"10.3103/S1068364X25600903","url":null,"abstract":"<p>The prospects for the formation of Fe–Pt nanoparticles in the pore structure of highly porous carbonizate of sapropelic coal are analyzed. Specific thermally stimulated behavior is established, demonstrating the great potential of such carbonizate to address the oxidation of iron often observed in the synthesis and storage of Fe–Pt nanoparticles, which are promising for catalytic and magnetic applications. In the Fe–Pt/C system, spontaneous reduction processes are noted at 250–900°C in an inert atmosphere. The reduction is due to CO and H₂ formed by catalytic reactions involving the carbon matrix and a platinum-bearing metal phase.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 7","pages":"609 - 614"},"PeriodicalIF":0.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145533185","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}

{"title":"Sustainable Slag-Based Alkali-Activated Rapid Repair Mortar: Composition Optimization and Multiscale Performance Enhancement via Response Surface Methodology","authors":"Long Cai,&nbsp;Huang Li,&nbsp;Zhang Cao","doi":"10.3103/S1068364X25600770","DOIUrl":"10.3103/S1068364X25600770","url":null,"abstract":"<p>In this study, an efficient, sustainable, and low-carbon slag-based rapid repair mortar (SBRRM) was developed to overcome the inherent limitations of slow hardening and insufficient early strength in conventional rapid repair materials. Response surface methodology (RSM) was employed to systematically optimize the composition, investigating the effects of varying cement substitution rates on setting time, mechanical performance, and bonding strength. Microstructural analyses were conducted using X-ray diffraction (XRD), scanning electron microscopy (SEM), and nitrogen adsorption-desorption (BET) techniques. The optimal composition identified through the model comprised a cement substitution rate of 24.82%, a water glass modulus of 1.5, an alkali equivalent of 8.1%, and a water-to-binder ratio of 0.54. Under these optimized conditions, the deviation between the predicted and experimental results was merely 3.82%, highlighting the model’s high predictive accuracy. After 28 days of curing, the optimized SBRRM exhibited significantly enhanced mechanical properties, achieving a compressive strength of 67.88 MPa and a bending bond strength of 4.9 MPa, corresponding to respective improvements of 16.5 and 54.84% compared to the pure slag system. Moderate incorporation of cement promoted the formation of calcium silicate hydrate (C–S–H) gels, refined the microstructure, reduced the number of large pores, and substantially improved the compactness and stability of the mortar. Additionally, nitrogen adsorption capacity decreased notably from 18.5326 to 14.1033 mmol/g, further confirming a denser and more cohesive microstructure. This study provides valuable theoretical insights into the design and practical application of eco-friendly rapid repair materials featuring high slag utilization and reduced cement content. The findings align closely with contemporary sustainable development goals, demonstrating significant potential for practical engineering applications and environmental benefits.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 7","pages":"629 - 648"},"PeriodicalIF":0.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145533392","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}

{"title":"Comparison of Using Homologous Coal Tar and Coal Tar Pitch as Co carbonization Agents to Prepare Mesophase Pitch","authors":"Mingzhi Wang,&nbsp; Xiaolong Zhou","doi":"10.3103/S1068364X25600836","DOIUrl":"10.3103/S1068364X25600836","url":null,"abstract":"<p>Using low-cost FCC oil slurry as the raw material, coal tar (CT) and coal tar pitch (CTP) as cocarbonization agents, mesophase pitch was prepared through a co carbonization method. The products and formation mechanisms of the mesophase pitch were analyzed. The properties and structure of the meso-phase pitch were characterized and analyzed using polarizing microscope, softening point, Fourier infrared spectroscopy, thermogravimetric analysis, X-ray diffraction (XRD), and Raman spectroscopy. The results indicated that when the reaction conditions were set at a temperature of 410°C, a pressure of 1 MPa, a reaction time of 6 h, with CT at a ratio of 15% or CTP at a ratio of 10%, the comprehensive performance of the resulting mesophase pitch was optimal. By comparing the performance parameters and images of the products from the FCC-CT-MMP and FCC-CTP-MMP systems, the research team found that an appropriate amount of CTP was more effective than CT in improving product performance. However, once the critical value was exceeded, the negative impact of CTP on the product was more pronounced than that of CT.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 7","pages":"680 - 695"},"PeriodicalIF":0.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145533345","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}

{"title":"Influence of the Structural and Group Characteristics of Petroleum Residues on the Microstructure and Yield of Volatiles of the Coke Produced: IR Spectroscopic Data","authors":"V. V. Bessonov,&nbsp;A. S. Zaporozhchenko,&nbsp;M. B. Alikin,&nbsp;S. V. Dronov","doi":"10.3103/S1068364X25600897","DOIUrl":"10.3103/S1068364X25600897","url":null,"abstract":"<p>IR spectroscopy of petroleum residue may be used to assess the microstructure and yield of volatiles of the coke produced. The structural and group characteristics of the petroleum components used in coking—catalytic cracking gas oil, tar sludge, heavy pyrolytic tar, and selective purification extract—are established by IR spectroscopy. The coke’s microstructure and yield of volatiles are determined as a function of the parameters <i>X</i> and <i>Y</i> based on the structural and group characteristics of the petroleum components.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 7","pages":"601 - 608"},"PeriodicalIF":0.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145533389","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}

{"title":"Large-Scale Application of Horizontal Heat Recovery Coking Technology in Blast Furnaces","authors":"Jun Zhang,&nbsp;Shijie Wang,&nbsp;Guangzhong Tian,&nbsp;Hongming Fang,&nbsp;Mengbo Dai,&nbsp;Mingjie Gao","doi":"10.3103/S1068364X25600812","DOIUrl":"10.3103/S1068364X25600812","url":null,"abstract":"<p>This paper conducts an analysis of thecharacteristics of horizontal heat recovery coke and its application in large-volume blast furnaces. Based on the different structural models of coke used in blast furnaces, a systematic analysis is carried out. At the same time, measures such as adjusting the quality of the coke itself and the operational system of the blast furnace are implemented. The technology for the large-scale application of horizontal heat recovery rammed coke in blast furnaces with a capacity of 1500 m³ and above is developed. This enables a 20–40% increase in the usage ratio compared to the conventional usage ratio, and a long-term stable usage ratio of over 80% is achieved. The goal of achieving efficient and stable operation of the blast furnace is also realized.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 7","pages":"661 - 670"},"PeriodicalIF":0.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145533184","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}

{"title":"Composition of Coal Tar Stored at Qarmet Coke Plant","authors":"A. T. Ordabaeva,&nbsp;Z. M. Muldakhmetov,&nbsp;S. V. Kim,&nbsp;M. G. Meiramov","doi":"10.3103/S1068364X25600915","DOIUrl":"10.3103/S1068364X25600915","url":null,"abstract":"<p>The organic components in coal tar from the waste dumps at Qarmet coke plant are identified by gas–liquid chromatography. The analysis yields the following results: 29.41% naphthalene and its derivatives; 3.42% acenaphthene; 3.94% dibenzofuran; 4.18% fluorene; 4.98% phenanthrene; 0.91% anthracene; 2.45% fluoranthene; and 0.94% pyrene. Medium-temperature pitch is obtained by vacuum distillation of coal tar from dump 1 at the Qarmet plant. Many characteristics of the pitch—such as the content of toluene-insoluble components (40.56%), softening temperature (85–90°C), and yield of volatiles (54%)—correspond to the standard for grade-B electrode pitch.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 7","pages":"615 - 620"},"PeriodicalIF":0.5,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145533347","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}