基于程序升温的煤低温氧化表观活化能试验研究

发布时间：2018-05-09 16:41

本文选题：活化能 + 红外光谱　；参考：《煤炭科学技术》2015年06期

【摘要】：为了鉴定玉华长焰煤、安山不黏煤和华丰气肥煤这3种不同变质程度煤样的自燃倾向性,利用程序升温试验,建立了耗氧速率与煤体温度之间的阿伦尼乌斯公式并对其进行对数处理得到活化能方程,分析该方程的线性回归直线斜率并计算出煤样低温氧化表观活化能,再采用傅里叶变换红外光谱仪对煤样的表面分子结构进行了分析,揭示了不同变质煤样自燃倾向性差异的原因。结果表明:在3种试验煤样中,随着变质程度的加深,表观活化能呈现出逐渐增大的趋势,自燃倾向性降低;随着变质程度的加深,煤样表面分子结构中有利于自燃的基团减少,不利于自燃的基团增大,导致自燃倾向性逐渐降低。
[Abstract]:In order to identify the spontaneous combustion tendency of Yuhua long flame coal, Anshan non-caking coal and Huafeng gas fat coal, the temperature programmed test was used to test the spontaneous combustion tendency of three kinds of coal samples with different metamorphic degrees. The Arrhenius formula between oxygen consumption rate and coal temperature was established, and the activation energy equation was obtained by logarithmic treatment. The linear regression linear slope of the equation was analyzed and the apparent activation energy of low temperature oxidation of coal sample was calculated. The surface molecular structure of coal samples was analyzed by Fourier transform infrared spectroscopy (FTIR), and the reasons for the difference of spontaneous combustion tendency of different metamorphic coal samples were revealed. The results show that with the deepening of metamorphism, the apparent activation energy increases gradually, and the tendency of spontaneous combustion decreases with the deepening of metamorphism. In the molecular structure of coal sample surface, the group which is favorable to spontaneous combustion is reduced, which is not conducive to the increase of the group of spontaneous combustion, which leads to the gradual decrease of spontaneous combustion tendency.
【作者单位】：西部矿井开采与灾害防治教育部重点实验室;西安科技大学能源学院;
【基金】：陕西省重点科技创新团队资助项目(2012KCT-09) 国家自然科学基金资助项目(51134019,51404192)
【分类号】：TD75

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