褐煤中官能团对其燃烧特性的影响

发布时间：2018-06-09 01:36

本文选题：褐煤 + 官能团　；参考：《煤炭科学技术》2016年04期

【摘要】：为研究煤的微观结构对煤的燃烧特性的影响,选取7种典型褐煤,借助热重分析仪、傅里叶变换红外光谱仪对所选煤样进行了结构特征及燃烧特性分析。利用Gaussian峰对褐煤红外光谱谱线进行分峰拟合,以此确定褐煤中官能团的分布、归属及结构特征,从而研究煤样中官能团对其燃烧特性的影响。结果表明:褐煤中芳香烃结构的稳定性较好,活性较低,对煤的着火是不利的;脂肪烃含量影响褐煤燃尽温度,对煤的燃尽不利;含氧官能团、羟基分别能提高褐煤着火后燃烧速度和降低褐煤的活化能,能促进煤的着火燃烧。
[Abstract]:In order to study the influence of the microstructure of coal on the combustion characteristics of coal, seven typical lignite were selected and the structural characteristics and combustion characteristics of the selected coal samples were analyzed by means of thermogravimetric analyzer and Fourier transform infrared spectroscopy (FTIR). The distribution, attribution and structural characteristics of functional groups in lignite were determined by fitting the spectral lines of infrared spectrum of lignite with Gaussian peak, and the effect of functional groups on combustion characteristics of lignite was studied. The results show that the structure of aromatic hydrocarbons in lignite is stable and the activity is low, which is unfavorable to the ignition of lignite, the content of fat hydrocarbon affects the burnout temperature of lignite, and it is unfavorable to burning out of lignite. Hydroxyl groups can increase the combustion rate of lignite after ignition and decrease the activation energy of lignite, and can promote the combustion of lignite.
【作者单位】：长沙理工大学能源与动力工程学院;
【基金】：国家自然科学基金资助项目(51206012)
【分类号】：TD849.2;TQ534

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