Study of the kinetics of the low-temperature oxidation of Donbass coals tending and not tending to undergo spontaneous combustion

As a result of a study of the low-temperature oxidation of coals of different rank in the range of temperatures from 20 to 120/sup 0/C, it has been established that at temperatures of 60-80/sup 0/C the nature of the oxidation process changes with a change in the kinetic indices. The influence of the medium in which the grinding of the coal samples is carried out on the nature and intensity of the oxidation process, on the number of paramagnetic centers (PMCs) in the coal, and on the nature of the change in the number of PMCs on oxidation has been shown. It has been established that there are no fundamental differences in reactivity with respect to atmospheric oxygen, in the number of PMCs, and in the composition of the functional groups and their change in the oxidation process between coals tending and those not tending to undergo spontaneous combustion.