Coke and Chemistry最新文献_第6页

Competitive Models and Mechanisms of Gasification Reactions on Hydrogen-Rich Smelting Process of Blast Furnace 高炉富氢冶炼过程气化反应的竞争模型与机理

IF 0.5

Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600186

Xiaowei Fu, Zhijun He, Wenlong Zhan, Junhong Zhang

{"title":"Competitive Models and Mechanisms of Gasification Reactions on Hydrogen-Rich Smelting Process of Blast Furnace","authors":"Xiaowei Fu, Zhijun He, Wenlong Zhan, Junhong Zhang","doi":"10.3103/S1068364X25600186","DOIUrl":"10.3103/S1068364X25600186","url":null,"abstract":"Blast furnace hydrogen-rich smelting effectively reduces CO2 emissions; however, the introduction of H2 generates H2O within the blast furnace, which influences the gasification reaction of coke. This study investigates the gasification reaction rates of coke in CO2/H2O single gas and CO2–H2O mixed gas atmospheres, employing an analog circuit method to construct the corresponding model. The results indicate that external gas diffusion is the rate-limiting step in the coke gasification process. In a CO2–H2O–N2 (40–20–40%) mixed gas environment, the coke gasification rate is lower than the sum of the rates observed in CO2–N2 (40–60%) and H2O–N2 (20–80%) atmospheres, suggesting a competitive interaction between CO2 and H2O in the gasification reaction of coke. Six different methods were employed to calculate the gasification reaction rates of coke in CO2/H2O single gases and CO2–H2O mixed gases, and the results reveal that method 6 most accurately elucidates their interaction. Additionally, the effect of H2O in the CO2–H2O–N2 mixture on coke gasification is more pronounced than that of CO2. Compared to coke gasification with only H2O, the CO2–H2O mixed gas promotes the conversion of amorphous carbon, reduces the consumption of aromatics, and increases the microcrystalline size.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 2","pages":"156 - 171"},"PeriodicalIF":0.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160574","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

Minimizing the Environmental Impact of Coal-Fired Power Plants 尽量减少燃煤电厂对环境的影响

IF 0.5

Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600253

M. A. Modina, B. V. Malozyomov, E. V. Voitovich

引用次数: 0

Coke Production from Heavy Tar Fractions of West Siberian Petroleum and Disposal of Noncommercial Fractions 西西伯利亚石油重质焦油馏分制焦及非商业馏分的处理

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Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600241

B. S. Zhirnov, A. V. Suslikov, E. S. Demidenko, V. P. Demidenko

引用次数: 0

Needle Coke Production from High-Temperature Cracking Residue 高温裂化渣生产针状焦

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Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600228

A. S. Zaporozhchenko, V. V. Bessonov, S. V. Dronov

引用次数: 0

Study on the Coal Quality Characteristics of a Gas Coal in Russia 俄罗斯某气煤的煤质特征研究

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Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600113

Feiping Huang, Jun Zou, Weirun Lan, Jian Zhou, Hongming Fang

引用次数: 0

Plastic Properties of Kuznetsk Basin Coal 库兹涅茨克盆地煤的塑性特性

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Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600204

V. A. Klimchuk, V. S. Solodov, A. P. Kozlov, T. G. Cherkasova

引用次数: 0

Influence of the Granulometric Composition of Coking Batch on Coke Quality 焦化料颗粒组成对焦炭质量的影响

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Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600216

E. V. Karunova, O. A. Kalko, I. V. Sorokina

引用次数: 0

Research on Biomass Blended Coal Combustion 生物质混煤燃烧研究

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Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X25600162

Lei Bao, Qing-hai Pang, Zhi-jun He, Jun-hong Zhang

{"title":"Research on Biomass Blended Coal Combustion","authors":"Lei Bao, Qing-hai Pang, Zhi-jun He, Jun-hong Zhang","doi":"10.3103/S1068364X25600162","DOIUrl":"10.3103/S1068364X25600162","url":null,"abstract":"The mixed combustion experiments of biomass with varying particle sizes and pulverized coal (PC) were conducted using a thermogravimetric analyzer. The results indicated notable differences in the impact of biomass particle sizes on mixed combustion. Particularly, straw (X) exhibited better promotion than bamboo (Y), with X1 and D showing the most favorable mixed combustion effects. On the other hand, Y relatively enhanced the combustion of Y2 and Y3. Analysis of the evolution of biomass functional group structure during the combustion process revealed that aliphatic hydrocarbons and C=C bands remained more stable at the initial stages of combustion, while aromatic hydrocarbons exhibited relative stability throughout the entire combustion process. During the decomposition of aromatic and aliphatic hydrocarbons, the fluctuations in the ratios of generated –CH3 and –CH3 of new radicals were minimal. However, there was a general trend of gradual reduction in the length of the aliphatic branch as the combustion time increased. Micro-characterization analysis demonstrated that during the degassing process of pulverized coal, pyrolysis reactions occurred, leading to the breakdown of oxygen-containing small molecules and aliphatic rings within aromatic structures present in the coal. The addition of biomass expedited the pyrolysis of pulverized coal and facilitated the graphitization process. Subsequent addition of bituminous coal resulted in an increase in stacking height, leading to a more orderly arrangement of carbon atoms.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 2","pages":"136 - 155"},"PeriodicalIF":0.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160844","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

Eco-Friendly Large-Scale Production of Reduced Graphene Oxide (rGO) from Dry Coconut Shells for the Removal of Direct Blue 86 Pollutant 从干椰子壳中大规模生产还原氧化石墨烯（rGO）以去除直接蓝86污染物

IF 0.5

Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X24601136

Animesh Dubey, Krishna Kanta Samanta, Rajalingham Thangavel, Diwakar Kumar, Jitendra K. Pandey

{"title":"Eco-Friendly Large-Scale Production of Reduced Graphene Oxide (rGO) from Dry Coconut Shells for the Removal of Direct Blue 86 Pollutant","authors":"Animesh Dubey, Krishna Kanta Samanta, Rajalingham Thangavel, Diwakar Kumar, Jitendra K. Pandey","doi":"10.3103/S1068364X24601136","DOIUrl":"10.3103/S1068364X24601136","url":null,"abstract":"In the current study, reduced graphene oxide (rGO) based on coconut shell waste was successfully synthesized using the carbonization method to remove Direct Blue 86 (DB86) pollutant dye from an aqueous solution. As per our knowledge, this is the first report where coconut shell-based rGO was used to remove DB86. Several state-of-the-art analytical techniques like XRD, XPS, UV–Vis, FTIR, Raman spectroscopy, BET, and TEM were performed to thoroughly characterize as-prepared rGO. The XRD analysis shows dominant peaks at 2θ of 23.39°, 43.15° and 46.40°. FTIR spectroscopy shows compounds' functional groups. XPS C1s spectrum shows a major peak at 284.6 eV corresponding to graphitic carbon and the sp2C shows a major peak at 283.2 eV. Raman spectra show the ID/IG intensity ratio of 0.73. Through HRTEM analysis the interplanar distance comes out to be 0.29 nm. The obtained specific surface area of rGO was ~273 m2/g using BET analysis. These analytical outcomes confirmed the formation of rGO. Further, the synthesized rGO was assessed for its dye removal efficacy using DB86 aqueous solution. The as-prepared rGO samples showed a significant dye removal efficiency of approximately 76% after 60 min of incubation, which might be due to the chemical interactions with dye molecules. The result of post-adsorption characterization study demonstrates that rGO almost retained its chemical properties, indicating its stability after adsorption. Subsequently, rGO can be successfully synthesized on a large scale using this renewable natural waste material (i.e., coconut shell waste) by carbonization method which could be used for wastewater treatment.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 2","pages":"172 - 184"},"PeriodicalIF":0.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160463","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 Gases on the Thermal Destruction of Coal 气体对煤热破坏的影响

IF 0.5

Coke and Chemistry Pub Date : 2025-06-01 DOI: 10.3103/S1068364X2560023X

S. A. Semenova, Yu. F. Patrakov, A. V. Yarkova

{"title":"Influence of Gases on the Thermal Destruction of Coal","authors":"S. A. Semenova, Yu. F. Patrakov, A. V. Yarkova","doi":"10.3103/S1068364X2560023X","DOIUrl":"10.3103/S1068364X2560023X","url":null,"abstract":"The reaction of coal with gases complicates its extraction and processing. In particular, nitrogen and carbon dioxide are used to localize and extinguish underground fires and warehouse fires. On heating coal aggregations, different gases may have very different effects on coal’s organic mass. Thermogravimetric analysis reveals individual stages in the decomposition of coal and permits prediction of its behavior in the presence of gases. In the present work, the reactivity of coal’s organic mass on pyrolysis in inert gas (nitrogen), oxidizing gas (oxygen), and redox gas (CO2) is assessed. The coal samples employed are of limited and moderate metamorphic development; they are susceptible to oxidation and self-ignition in coal beds, in storage, and in transportation. Thermogravimetric analysis indicates that, if oxygen is present, it will be adsorbed, with increase in the sample mass in the range 150–350°C. On that basis, the risk of coal oxidation and self-ignition may be assessed. In the presence of nitrogen and carbon dioxide but not oxygen, reducing reactions predominate, with the formation of solid carbon residue. In contrast to pyrolysis in inert gas (nitrogen), pyrolysis in carbon dioxide is accompanied by gasification, with increase in the coal’s mass loss at low and moderate temperatures.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 2","pages":"102 - 107"},"PeriodicalIF":0.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160785","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