Measurement of Activation Energy of Coal Oxidation at Low Temperature by Spontaneous Combustion Experiment

• 1、School of Safety Engineering, China University of Mining & Technology

Abstract：Activation energy of coal oxidation at low temperature is an important index to analyze spontaneous combustion character of coal. Though analyzing existing measuring method of activation energy, based on the theory of heat conduction and , a new measuring method of activation energy of coal oxidation at low temperature using small-sized spontaneous combustion experimental table with heating power is developed. Activation energy of coal oxidation with different tendency of spontaneous combustion and size can be measured. Furthermore, the relationship of activation energy with dynamic oxygen consumption and size. The result shows that activation energy decreases with dynamic oxygen consumption increased, but not linearly. The activation energy also decreases with the decreased in size. However, when the size reaches about 1mm, the activation energy is almost changeless. The activation energy can be measured exactly by spontaneous combustion experiment. The result can fit for the practical character of coal oxidation and reflect the tendency of spontaneous combustion of coal well.

Keywords： spontaneous combustion of coal spontaneous combustion experiment activation energy oxidation at low temperature tendency of spontaneous combustion of coal dynamic oxygen consumption size