平朔气煤的煤岩显微组分结构研究

用显微光度计、扫描电子显微镜(SEM)、傅立叶变换红外光谱(FTIR)、X射线衍射光谱(XRD)和X光电子能谱(XPS)等测试手段研究了平朔气煤的等密度梯度离心分离(DGC)显微组分富集物的结构。结果表明,镜质组和稳定组结构相似,含氧基团基本相同,但丝质组结构则不同,它含有较多的羧基和羰基。根据实验结果讨论了三种显微组分的大分子结构,认为它们是由许多结构相似而又不相同的结构单元所构成。镜质组和稳定组的单元核心主要为脂环、缩聚芳环,环数为5—6个;丝质组单元核心主要为缩聚芳环,环数为7—8个,环缩合程度最高,芳香层片在空间排列规则,相互定向程度大。

STRUCTURE CHARACTERIZATION OF MACERALS FROM PINSHUO GAS COAL

The structure of three macerals (vitrinite,liptinite,fusinite) from Pinshuo gas coal was investigated by several techniques. Maceras were demineralized using a mixed acid (45%HC1+15%HF+40%H_2O).Microstructural properties, including physical structure, molecular structure, microcrystallite etc.were determined. Morphology of the macerals was examined by SEM, organic molecular structure was examined by FTIR, XRD and XPS. The results indicate that molecular structure and the oxygen groups of vitrinite are similar to those of liptinite. But those of fusinit(?) are diffrent in containing many carbonyl and carboxyl groups. Based on the experimental results,the molecular structure of different macerals is suggested.The kernel of molecular strusture of vitrinite, same as liptinite, are hydrogenated aromatic-rings with ring number of five to six. But the kernel of fusinite molecule is condensed aromatic rings with ring number of seven to eight,molecule carbons are lined with regularity.