Influence of Oxygen-Containing Functional Groups on Carbon Monoxide Occurs in Low Rank Coals
Influence of Oxygen-Containing Functional Groups on Carbon Monoxide Occurs in Low Rank Coals
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DOI：
10.1016/j.proeng.2012.08.267
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Yuehong Wang;J. Wen;Li-wen Guo;Jiu-ling Zhang
中科院分区：
文献类型：
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作者：
Yuehong Wang;J. Wen;Li-wen Guo;Jiu-ling Zhang
为了解释煤矿开采过程中煤层中一氧化碳超标的现象。在低煤阶煤层中采集了8个不同变质程度的典型煤样。然后进行了工业分析和元素实验。利用傅里叶红外光谱仪测定了不同温度（303.15K、323.15K、343.15K、363.15K）下煤的红外光谱图，研究了煤中含氧官能团的存在形式，并通过观察含氧官能团的变化规律，研究了煤中一氧化碳的生成对煤中一氧化碳生成的影响。结果表明，低阶煤中羟基自由基以与水分子中氢缔合的形式存在。另外，含氧官能团中的羟基和羰基的活性较强，对煤层中一氧化碳的生成有重要影响。此外，随着温度的变化，含氧官能团的总数量减少。此外，在反应过程中还产生了大量的醚氧基团。相反，羟基自由基和羰基的数量也有所减少，对低阶煤中一氧化碳的生成影响不大。研究结果可为低煤阶煤层的安全开采提供理论依据。
In 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.