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| Distribution regulation of functional groups under low temperature of different coals |
| Wan Youji, Cao Zhanqing, Zhan Shan, Hou Xinran |
| North China University of Science and Technology ,Tangshan 063009, China |
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Abstract In order to study oxidative spontaneous combustion characteristics of different coals under ow temperature, five different coal samples of lignite, long flame coal，gas coal，fat coal, coking coal were selected from Duolunxiexin Coal Mine, Shanhou Coal Mine, Jinggezhuang Coal Mine, Qianjiaying Coal Mine, Tangshan Coal Mine respectively to make proximate and element analysis. Based on fourier infrared spectrometer, infrared spectrum experiment was made and distribution regulation of functional groups under oxidative spontaneous combustion process of different coals was reached. The results showed that number of Oxygen containing functional groups was reduced with increasing coal metamorphic degree. In the process of low temperature oxidation of coal, the change of its inner microscopic compositions was caused by change of Oxygen containing functional groups and reactivity of different functional groups was different.
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