Influence of Oxygen-Containing Functional Groups on Carbon Monoxide Occurs in Low Rank Coals

AbstractIn order to explain the phenomenon that carbon monoxide exceeds and occurs in the coal seams during the process of coal mining. Eight typical coal samples of different metamorphic degree in low rank coal seam were collected. And then, the analyses of industry and element experiments were performed. Furthermore, the infrared spectrogram of coals were measured at different temperature (303.15K, 323.15K, 343.15K, 363.15K) by the Fourier infrared spectral instrument to study the existing form of the oxygen-containing functional groups, and through observing the changeable laws of the oxygen-containing functional groups to research the influence of the carbon monoxide occurs in low rank coals. The results showed that hydroxide radical existed in the form of associating with hydrogen in the water molecule in low rank coals. In addition, the activities of hydroxide radical and the carbonyl of oxygen-containing functional groups were stronger than other groups, so they had an important effect on carbon monoxide occurs in coal seams. What's more, a total number of oxygen-containing functional groups were decreased with the change of the temperature. Furthermore, there were lots of ether oxygen groups in the process. On the contrary, a number of hydroxide radical and carbonyl were also decreased, it had little influence on carbon monoxide occurs in low rank coals. To sum up, the research can provide theoretical basis for the safety of low rank coal seams’ mining