Experimental Study on Infrared Spectrum Characteristics of Coal in Low Temperature Oxidation

Abstract

Coal spontaneous combustion is a complex procedure of physical and chemical changing, in which the macro characters is the reflection of micro changes of coal molecule structure in low temperature oxidation. In order to understand the essence of coal-oxygen composition, the Fourier transform infrared spectrum apparatus is used to test and analyze different kinds of coal samples in different oxidation temperature. According to main characteristic spectrum peaks, the activity of coal functional groups is studied. The difference and change of the type and quantity of functional groups in different kinds of coal sample in different temperature are analyzed. The relation between the macro structure change and spontaneous combustion property of coal in low temperature oxidation process is discussed.

Experimental Investigation into the Spontaneous Ignition Behavior of Upgraded Coal Products

“…Zhang 25 and Yang 26 found that the microstructure of coal contained numerous surface functional groups that were more active and could more easily take part in the oxidation process. The bridge of the microstructure and the side chain of the bond bridge are more likely to be oxidized, which mainly contained methyl (−CH 3 ), methylene (−CH 2 −), and ether (−O−) bonds.…”