无烟煤结构的高分辨电镜研究

镜质组不仅是煤结构变化最具规律性，也是影响煤质的主要微成分。用点分辨率为２．１Ａ的高分辨电镜对几种不同煤化程度的无烟煤大分子结构进行了研究。结果表明：电镜图像直接表征了无烟煤分子的非均匀性孔隙结构。京西煤分子方向化程度强，主要以芳层平行堆或有序化前结构为主；晋城煤方向化程度弱，主要以粒状嵌晶结构为主。高分辨电镜技术是研究煤分子结构和煤化作用实质的有效方法。

STUDY OF COAL STKUCTURE BY USING HRTEM

Vitrinite is the maceral which has regular changing property with coal strur-ture, and it is also a main component affecting the coal quality. A high resolution transmis-sion electron microscopy(HRTEM)with point resolution of 2.1 was used to analyse themacromolecular structure of some different rank coals. The results indicate that nonhomoge-nous pore structure of anthracite macromolecule can be directly characterized by HRTEM.The degree of molecule orientation of Jingxi anthracite is stronger than that of Jincheng au-thracite,The former is mainly composed of parallel aromatic stack and pre-oriented struc-tures,while the latter granular structure,The technique of HRTEM is an effctive methodused for coal molecular structure and coalification nature studies.