Experimental Study on Oxidation Kinetics Parameters of Coal Under Different Oxygen Concentration

In order to study the relationship between oxygen concentration and abandoned coal low-temperature oxidation kinetics parameters, we match four groups of different mixture of oxygen and nitrogen, the oxygen concentration is 5.9%, 10.2%, 16% and 21.3% respectively. We carry out heat oxidation experiment by reacting with hybrid particle size of coal samples in oil bath type coal low temperature oxidation experimental system, and measure the volume fraction of O₂ at the outlet of coal sample tank at different temperature, and repeat the experiment in every oxygen concentration. We get the standard oxygen consumption rate of different oxygen concentration at different temperature, and the changing law of the apparent activation energy（E_a）and pre-exponential factor（A）. The results show that the standard oxygen consumption rate is the same in same temperature, the E_a and A do not change with the change of oxygen concentration, it's a fixed value.