Experimental research on principle of coal oxidation under moderate temperature

Abstract：Coal sample was heated under a serial of constant temperatures.Coal temperature histories were recorded, and coal mass variation was also measured.The result shows that the temperature increase is due to the oxidation of the active components of coal.The peak values of temperature gradient in lean coal appear at about 220℃, 280℃, 330℃ and 490℃, and appear at 203℃, 290℃ and 368℃ in lignite.It shows that most of different rank active components react near these temperatures.

Keyword：coal;heating;temperature gradient;active component;