Fine structure of Raman spectra in coals of different rank
Fine structure of Raman spectra in coals of different rank
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DOI：
10.1016/j.coal.2013.10.014
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发表时间：
2014
影响因子：
5.6
通讯作者：
E. V. Ulyanova;A. N. Molchanov;I. Prokhorov;V. Grinyov
中科院分区：
文献类型：
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作者：
E. V. Ulyanova;A. N. Molchanov;I. Prokhorov;V. Grinyov
研究了不同煤的拉曼光谱中GandD带的精细结构。结果表明，所有次烟煤和烟煤的光谱都可以分解为5个亚组分，而无烟煤的光谱最好用2、3或4个亚组分来拟合，这取决于煤阶。该分析能够分离出D带的一个子成分，可能是石墨簇中不完整的原因，它在整个变质范围内显示出几乎线性的变化，可以起到煤型指示剂的作用。我们发现，同一肥煤的拉曼光谱在地下突出前显示多一个亚组分，而在突出后仅显示两个亚组分。这个在1190 cm− 1附近的子分量可以归因于甲基键的振荡，并可能作为爆发的指示。
Fine structure ofGandDbands in Raman spectra of various coals is studied. It is shown that the spectra of all subbituminous and bituminous coals can be decomposed into 5 subcomponents while the spectra of anthracites are best fitted using 2, 3 or 4 subcomponents depending on coal rank. The analysis enabled to separate one subcomponent of D band, probably responsible for imperfections in graphitic clusters, which shows nearly linear shift in the whole metamorphism range and can play role of the coal type indicator. We have found that Raman spectra of the same fat coal reveal one more subcomponent just before underground outburst and only two subcomponents after the outburst. This subcomponent near 1190 cm− 1is assignable to oscillations of methyl group bonds and probably can serve as the outburst indicator.