DTA STUDIES OF THE LOW-TEMPERATURE OXIDATION OF LOW RANK COALS

Differential thermal analyses of reactions between dried low rank coals and oxygen at temperatures of 30, 60, 90, 120, 150 and 180 °C show an immediate, sharp exothermic response. The exotherm increases with increasing temperature and is most pronounced for the coal most prone to spontaneous combustion. At temperatures below 120 °C a second exotherm is seen after 15-20 min. © 1990.