煤质技术2024，Vol.39Issue(4)：8-14,7.DOI:10.3969/j.issn.1007-7677.2024.04.002
不同变质程度煤自燃产物特性与官能团变化
Product characteristics and functional group changes of spontaneous combustion during different stages of metamorphic coal
摘要
Abstract
The characteristic of coal molecular structure is the basis for studying the process of coal oxidation and spontaneous combustion and the mechanism of coal spontaneous combustion,the change law of middling coal molecu-lar structure in the process of coal low-temperature oxidation is the fundamental way to explain the cause of coal spon-taneous combustion,which is of great significance to the study of coal spontaneous combustion characteristics.Taking Yannan lignite,Hongyang coking coal and Nanyangpo anthracite as the research objects,the temperature pro-grammed system was used to test the law of gas product formation during low temperature oxidation of coal.The micro-structure characteristics of coal with different metamorphic degrees were analyzed by Fourier transform infrared spec-troscopy(FTIR).The influence of temperature on the surface functional groups of coal molecules was explored.The intrinsic properties of coal spontaneous combustion were revealed and characterized from macro and microscopic.The results shows that:the amount of gas products increased with the increase of temperature,the molecular structure of coal was broken and aromatic nucleus condensation was carried out in the process of coal oxidation at low tempera-ture.With the deepening of coal metamorphism,the amount of gas products decreased,the content of oxygen-contai-ning functional groups on the surface of coal molecules decreased,the activity decreased,and the spontaneous com-bustion ability of coal weakened.With the increase of temperature,the methyl and methylene groups on coal molecu-lar surface increased as a whole,the hydroxyl groups decreased at first,then increased and then decreased,and the carboxyl and carbonyl groups increased.关键词
煤自燃/产物特性/官能团/程序升温实验/红外光谱/芳香核/气体产物生成量Key words
coal spontaneous combustion/product characteristics/functional group/programmed heating experi-ment/infrared spectroscopy/aromatic nucleus/amount of gas product分类
化学工程引用本文复制引用
李璕,李伟,姚海飞,彭然,贾廷贵..不同变质程度煤自燃产物特性与官能团变化[J].煤质技术,2024,39(4):8-14,7.基金项目
煤炭科学技术研究院有限公司科技发展基金资助项目(2023CX-I-16) （2023CX-I-16）
