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新疆中低阶煤微晶结构研究OA北大核心CSTPCD

Study on microcrystalline structure of medium and low rank coals in Xinjiang

中文摘要英文摘要

基于X射线衍射实验和傅里叶红外光谱实验,探讨了新疆准东、准南、吐哈及库拜煤田6 组煤样的微晶结构特征及演化规律.结果表明:低阶煤中,002 峰和 100 峰均峰形平缓,002 峰随煤阶的增高逐渐尖锐,且"对称性"变好,100 峰高度逐渐增高,但峰宽逐渐变窄;随着煤样变质程度的增大,芳香层片堆砌高度、延展度及其数量逐渐增大,芳香层片间距整体上呈下降趋势,煤中芳香结构的缩合程度逐渐增大;芳香族化合物和含氧官能团波段峰形尖锐,脂肪烃类物质和羟基官能团波段峰形平缓,均随着煤阶的升高而逐渐宽缓;随着煤阶的升高,芳香度、脂肪链长及其支链化程度、成熟度逐渐减小,而缩聚程度、生烃(油)能力逐渐增大;煤的演化过程以含氧官能团的脱落、脂肪烃类的富集、部分芳烃的缩聚为特征.

Based on X ray diffraction and Fourier transform infrared spectroscopy,the microcrystalline structure characteristics and evolution patterns of a total of 6 coal samples from the eastern Junggar,southern Junggar,Tuha,and Kubai coalfields in Xinjiang were investigated.The peak shape of 002 and 100 peaks in low-rank coal is gentle,the peak 002 becomes sharper and the"sym-metry"becomes better with the increase of coal rank,and the peak height of the peak 100 gradually increases but the peak width gradually shrinks.The height of the peak 100 gradually increases but the width gradually narrows;with the increase of coal sample metamorphism,the stacking height,elongation and quantity of aromatic laminates increase gradually,the spacing of aromatic lamin-ates decreases on the whole,and the condensation degree of aromatic structures in coal increases gradually;the peak shape of aro-matic compounds and oxygen-containing functional groups is sharp,and the peak shape of aliphatic hydrocarbons and hydroxyl functional groups is gentle,which gradually widens and slows down with the rise of coal rank;with the increase of coal rank,the aro-maticity,fat chain length,branched chain degree and maturity gradually decrease,while the polycondensation degree and hydrocar-bon(oil)generation ability gradually increase.The evolution process of coal is characterized by the shedding of oxygen-containing functional groups,the enrichment of aliphatic hydrocarbons,and the condensation of some aromatics.

曹玉召;杜亮;王海超;曾志伟;杨梦梦;李耀伟

新疆大学 中亚造山带大陆动力学与成矿预测自治区重点实验室,新疆 乌鲁木齐 830047||新疆大学 地质与矿业工程学院,新疆 乌鲁木齐 830047

矿山工程

低阶煤中阶煤X射线衍射傅里叶红外光谱微晶结构煤演化

low rank coalmedium rank coalX-Ray diffractionFourier transform infrared spectroscopymicrocrystalline struc-turecoal evolution

《煤矿安全》 2024 (010)

9-18 / 10

国家大学生创新训练资助项目(202110755005);新疆维吾尔自治区天山青年计划资助项目(2020Q065);国家自然科学基金资助项目(42262021)

10.13347/j.cnki.mkaq.20230590

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