Effects of inertinite content in coal on char structure and combustion

摘要

This paper reports data on the combustion characteristics of seven high-volatile bituminous coals (VR_r≈0.65/100) with increasing inertinite contents (10-68/100). Structural parameters of pyrolysis chars are compared wit t maceral compositions and distributions of maceral reflectaces in the parent coals and with their combustion efficienies. The mnicroscopic study of pyrolysis chars obtained to 1000 deg.C reveals that inertinte-rich coal chars are much denser than those of inertinite-lean coals. The reactivity of these chars at low temperatures (500 deg.C) decreases with the increase of inertinite content of the parent coals, this being attributed to the highly cross-linded structure of the inertinites.