FTIR study of the evolution of coal structure during the coalification process
FTIR study of the evolution of coal structure during the coalification process
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DOI：
10.1016/0146-6380(96)00063-0
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发表时间：
1996-06-01
影响因子：
3
通讯作者：
Moliner, R
中科院分区：
文献类型：
--
作者：
Ibarra, JV;Munoz, E;Moliner, R
采用傅里叶变换红外光谱（FTIR）和曲线拟合分析方法，研究了从泥炭到半无烟煤的一系列不同煤阶煤的结构特征，以及煤化作用过程中煤的主要结构变化。基于FTIR数据和曲线分辨谱带计算了几个结构参数。这些参数提供了定量的证据，芳香性的增加和脂肪族和含氧结构的损失，随着成熟度的增加。对芳族C-H平面外区域（900-700 cm（-1））的分析表明，直到烟煤阶段，芳族取代基的损失以及随后随着煤化作用的增加芳族缩合程度的增加。芳香碳与羧基的比值（1605 cm（-1）/1605 cm（-1）+ 1705 cm（-1））似乎是评价煤自然成熟度的一个合适参数。版权所有（C）1996 Elsevier Science Ltd
A series of coals varying in rank from peat to semi-anthracite was studied by Fourier Transform infrared spectroscopy (FTIR) and curve-fitting analysis in order to gain additional information on coal structure and the main structural changes that take place during the coalification process. Several structural parameters based on FTIR data and curve-resolved bands were calculated. These parameters provide quantitative evidence of the increase of aromaticity and the loss of aliphatic and oxygen-containing structures with increasing maturation. The analysis of the aromatic C-H out-of-plane region (900-700 cm(-1)) reveals the loss of aromatic substituents up to the stage of bituminous coal and the subsequent increase in the degree of aromatic condensation with increasing coalification. The ratio of aromatic carbons to carboxyl groups (1605 cm(-1)/1605 cm(-1) + 1705 cm(-1)) appears to be a suitable parameter for assessing the natural maturation of coal. Copyright (C) 1996 Elsevier Science Ltd