低阶煤中小分子化合物的组成研究

Research on Composition of Low Molecular Compounds in Low Rank Coals

采用四氢呋喃索氏抽提和GC-MS检测的方法,将4种低阶煤中的小分子化合物进行分离与分析表征。实验结果表明低阶煤中小分子化合物主要由脂肪烃、芳香烃和含氧化合物构成。在褐煤中含氧化合物含量更多,小龙潭褐煤萃取的小分子化合物中酚类含量达到56.12%。在次烟煤中芳香烃含量和缩合度更高,神木煤的小分子化合物中双环和三环芳香烃含量达到26.61%和23.30%。

The low molecular compounds in four low rank coals were separated and analyzed by using the methods of terahydrofuran soxhlet extraction and GC-MS. The results show that the low molecular compounds were mainly composed by aliphatics, aromatics and oxygen-contained compounds. The lignites had more content of oxygen-contained compounds, while the subbituminous coal had more content of aromatics with high degree of condensation. The phenol content in low molecular compounds of XLT was 56.12%. The dicyclic and tricyclic aromatics contents of SM was 26.61% and 23.30%.