The observation by SEM and analysisshow that the morphology of the char particles may be divided into four types and it is relat-ed with the maceral and the rank.

• 对其中三种煤九组样的焦的比表面和平均孔径测量表明，它们之间有近似反比的关系，微成分对同一煤的不同粉煤颗粒的比表面存在影响。