平顶山矿区构造煤傅里叶红外光谱和^(13)C核磁共振研究  

FTIR and ^(13)C NMR characterizations for deformed coal in Pingdingshan mining

作　　者：郭德勇[1] 叶建伟[2] 王启宝[2] 郭晓洁[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《煤炭学报》2016年第12期3040-3046,共7页Journal of China Coal Society

基　　金：教育部科学研究重大基金项目(311022);国家自然科学基金重点项目(41430640)

摘　　要：利用傅里叶红外光谱(FTIR)和核磁共振(13C NMR)技术对平顶山矿区不同变形程度构造煤和原生结构煤的分子结构差异进行了分析。红外光谱分析表明,构造煤的生烃潜能('A')和脂肪链长及支链化程度(B)均小于原生结构煤,芳脂比(I)大于原生结构煤,缩合度(DOC)变化不明显;随变形程度的增加,构造煤生烃潜能('A')逐渐减小,缩合度(DOC)逐渐增加。核磁共振分析结果显示,官能团对煤中芳碳率和脂碳率的变化有一定贡献,芳碳区存在显著差异的主控因素为带质子芳碳和桥接芳碳(fH,Ba),脂碳区中的主要影响因素是亚甲基碳(fb2);随变形程度的增加,构造煤中亚甲基碳(fb2)逐渐减小,带质子芳碳和桥接芳碳(fH,Ba)逐渐增加。通过对构造煤化学结构的傅里叶红外光谱和核磁共振分析,进一步揭示了构造煤在煤与瓦斯突出中的作用。The molecular characters of deformed coal and undeformed coal from Pingdingshan mine were studied with FTIR and ^13C NMR. The values of hydrocarbon-generation potential （＇A＇） and the length of aliphatic chains and branching degree （B） for deformed coal are smaller than those of undeformed coal, and the values of aromatic lipid ratio （I） for deformed coal are larger than those of undeformed coal, and condensation degree （DOC） has no obviously change from the change characteristic of FTIR parameters. With the increased of deformation degree, the hydrocarbon- generation potential （＇A＇） decreases and condensation degree （DOC） gradually increase. From the result of ^13C NMR, all kinds of functional groups contributes to the change of aromatic carbon and aliphatic carbon. The main con- trolling factors which makes the difference of deformed coal and undeformed coal for aromatic carbon area are protonated aromatic carbons and aromatic bridgehead carbon （fa^H,B）, and its for the aliphatic carbon area are methylene （fb2）. With the increased of deformation degree, methylene （fb2） decreases and protonated aromatic carbons and aro- matic bridgehead carbon （fa^H,B） gradually increase. The chemical structure of deformed coal was analyzed by fourier transform infrared spectroscopy （FTIR） and nuclear magnetic resonance （t3C NMR） and the effect of deformed coal on gas outburst was further revealed.

关 键 词：构造煤 傅里叶红外光谱 ^13C核磁共振 煤结构 

分 类 号：TD712[矿业工程—矿井通风与安全]