摘要
利用傅里叶变换红外光谱(FTIR)技术深入了解山西地区不同变质程度烟煤显微组分之间的官能团分布、碳结构演化和芳香度等结构特征差异,可为其优质炼焦煤的应用奠定理论基础。实验选取山西地区5种不同变质程度的优质烟煤作为研究对象,通过手选结合密度梯度离心(DGC)的方法对煤中的镜质组及惰质组进行分离。采用傅里叶变换红外光谱(FTIR)与分峰拟合相结合的分析方法,计算原煤及其镜质组、惰质组的相关结构参数。结果表明,随着煤变质程度的增加,原煤及其镜质组、惰质组的芳香度均呈现上升趋势,且原煤的芳香度愈发趋于惰质组的芳香度,镜质组具有更多的官能团结构,镜质组对大分子结构的影响大于惰质组,原煤及镜质组的苯环上单取代基相对含量呈上升趋势、苯环上二取代基相对含量呈先上升后下降的趋势,可为炼焦煤的应用提供重要信息。
The fourier transform infrared spectroscopy(FTIR)technology can be used to gain the functional group distribution,carbon structure evolution and aromaticity differences among different metamorphic macerals of bituminous coal in Shanxi region,so the theoretical foundation for the application of high-quality coking coal can be supported.In this experiment,five kinds of high-quality bituminous coal with different degrees of metamorphism in Shanxi were selected as the research object,and vitrinite and inertinite were separated by hand separation combined with density gradient centrifugation(DGC).The structural parameters of raw coal,vitrinite and inertinite were calculated by Fourier transform infrared spectroscopy(FTIR)combined with peak splitting fitting.The results show that,the aromaticity of raw coal,vitrinite and inertinite all show an upward trend,and the aromaticity of raw coal increasingly tends to be the aromaticity of inertinite with the increase of coal rank.Vitrinite has more functional group structure,and the influence of vitrinite on macromolecular structure is greater than that of inertinite.The relative content of single substituent group on benzene ring in raw coal and vitrinite increases,and the relative content of dissubstituent group on benzene ring increases first and then decreases,which provide important information for the application of coking coal.
作者
梁椿豪
韩冬青
李宁辉
韩新杰
李秀峰
袁超
LIANG Chunhao;HAN Dongqing;LI Ninghui;HAN Xinjie;LI Xiufeng;YUAN Chao(Shanxi Coking Coal Group Corporation Ltd.,Taiyuan 030024,China;Shanxi Coke Coking Coal Clean Utilization Laboratory,Shanxi Coking Coal Group Corporation Ltd.,Taiyuan 030024,China)
出处
《煤质技术》
2023年第3期37-43,56,共8页
Coal Quality Technology
基金
山西省科技重大专项基金资助项目(20181102020)。
关键词
傅里叶变换红外光谱
显微结构特征
结构参数
芳香度
镜质组
惰质组
官能团结构
FTIR
microscopic structure
characteristics
structure parameter
aromaricity
vitrinite
inertinite
functional group structure
