Study on the Relationship between Chemical Structure and Thermoplasticity of Moderately Metamorphic Coking Coal

IF 0.4 Q4 ENGINEERING, CHEMICAL

Coke and Chemistry Pub Date : 2024-02-06 DOI:10.3103/S1068364X2360001X

Yefei Lv, Zhang Sun, Wenjia Hu, Jiawei Han, Ning Shang

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Abstract

The quality of coke is to some extent closely related to the technological properties of coking coals due to the differences in chemical structure of coking coals with various degrees of metamorphosis. To explore the correlation between the chemical structure of coking coal and thermoplastic index, in order to better grasp the properties of coking coal, reduce the waste of coking coal resources, and help to achieve the goal of “dual carbon.” The correlation between the chemical structure and thermoplastic index was investigated by fitting FT-IR spectra of eight moderately metamorphosed coking coals and the determination of the caking index and Gieseler fluidity. Research shows that a good correlation can be observed between the average aliphatic side chain length, aromaticity and the aromatic hydrogen rate and the leverage diagram of the volatile fraction effect of coking coal; extremely close links between the three structural parameters and the thermoplastic properties at the same time; The chemical structure parameters can be used to predict the volatile fraction and thermoplastic properties of coking coals.

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中变质焦煤化学结构与热塑性关系研究

摘要由于不同变质程度炼焦煤化学结构的差异，焦炭的质量在一定程度上与炼焦煤的工艺性能密切相关。探讨炼焦煤化学结构与热塑性指标的相关性，以更好地掌握炼焦煤的特性，减少炼焦煤资源的浪费，有助于实现 "双碳 "目标。通过拟合 8 种中等变质焦煤的傅立叶变换红外光谱，测定结块指数和吉赛尔流动性，研究了化学结构与热塑性指数之间的相关性。研究表明，平均脂肪侧链长度、芳香度和芳香氢率与炼焦煤挥发分效应杠杆图之间存在良好的相关性；三个结构参数同时与热塑性能之间存在极其密切的联系；化学结构参数可用于预测炼焦煤的挥发分和热塑性能。

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来源期刊

Coke and Chemistry ENGINEERING, CHEMICAL-

CiteScore

0.70

自引率

50.00%

发文量

期刊介绍： The journal publishes scientific developments and applications in the field of coal beneficiation and preparation for coking, coking processes, design of coking ovens and equipment, by-product recovery, automation of technological processes, ecology and economics. It also presents indispensable information on the scientific events devoted to thermal rectification, use of smokeless coal as an energy source, and manufacture of different liquid and solid chemical products.