School of Resources and Earth Science,China University of Mining & Technology Key Laboratory of Coal-Bed
Methane Resource and Reservior Formation Process,Ministry of Education

基于傅里叶红外光谱（FTIR）和分峰拟合技术,对长焰煤和无烟煤2种不同煤阶煤的官能团进行定性和半定量研究,结合子峰面积拟合,对比分析了2种煤的化学结构参数。研究结果表明:FTIR和分峰拟合技术可以有效表征煤中官能团特征。长焰煤的生烃潜力比无烟煤更强,表现为长焰煤的A因子比无烟煤的大。低变质程度煤中有机质含量较高变质程度煤的少,高变质程度煤的有机质成熟度高于低变质程度煤。无烟煤的脂肪链长CH3/CH2比值低于长焰煤,反映低变质煤向高变质煤演化过程中,煤中脂肪链支链数量发生一定程度的减少,脂肪族主链长度不断缩短,煤的骨架变得愈疏松。无烟煤的缩合度DOC和芳香度AR均大于长焰煤的,随煤的变质程度提高,煤的芳香化程度越来越高,煤的芳香环缩合程度越来越强,易发生缩合作用。

Based on Fourier Transform infrared spectroscopy(FTIR) and peak ftting technique,qualitative and semi-quantitative studies were carried out on the func tional groups of two different coal ranks,long flame coal and anthracite. Combined with the area of peak ftting,the chemical structure parameters of the two coals were compared and analyzed. The results show that FTIR and peak ftting technique can characterize the functional groups in coal effectively. The hydrocarbon generation p otential of long flame coal is stronger than that of anthracite,as the factor A of long flame coal is larger than that of anthracite. The content of organic matter in coal with low metamorphism is higher than that of coal with high metamorphism. And the organic matter maturity of coal with high metamorphism is higher than that of coal with I oW metamorphism. The ratio of fatty chain length CH3/CH2 of anthracite is lower than that of long flame coal indicating that during the evolution of low metamorphic coa I to high metamorphic coal,the number of fatty chain branches in the coal is reduced to some extent,the length of the aliphatic backbone is shortened,and the skeleton 0 f the coal becomes looser. Anthracite condensation degree DOC and aromaticity AR are greater than long flame coal,as the degree of metamorphism of coal increases,t he degree of aromaization of coal becomes higher and higher,and the degree of condensation of the aromatic ring of coal becomes stronger and stronger,and condensa tion occurs.

国家自然科学基金资助项目(41702167)；大学生创新训练资助项目(201812090073X)；

0 引言
1 样品制备与试验方法
1.1 煤样品选取与工业分析
1.2 煤的FTIR测定与分峰拟合
2 试验结果与讨论
2.1 谱图特征
2.2 官能团种类及分布特征
2.3 煤化学结构参数
3 结论

梁昌鸿,梁伟强,李伍.基于傅里叶红外光谱不同煤阶煤的官能团研究[J].煤炭科学技术,2020,48(S1):182-186.