摘要
采用原位傅里叶红外光谱法实时测试了3种不同低阶煤的低温热反应过程,对光谱数据进行了峰面积曲线拟合处理,定量分析了低阶煤中各主要官能团的变化规律,研究了低阶煤整体活性的变化特性,进而分析了干燥温度对低阶煤干燥影响的微观机理。结果表明,在热的作用下,低阶煤自身进行了活跃的化学反应,甲基亚甲基先减少后增加;含氧官能团变化复杂,羟基逐渐减少,羧基由平稳到逐渐减少过渡,羰基先减少后增加;低阶煤自身活性也发生了较大的变化,主要活性官能团总量以及活性官能团所占比例都逐渐减小;低阶煤低温干燥去除外在水分对煤性质的影响,主要是热反应对低阶煤整体活性的影响,研究确定了40℃之前为最佳干燥温度。
The thermal reaction process of three different low rank coal was tested by in situ Fourier transform infrared emission spectroscopy at low-temperature.Quantitatively analyzed the change of functional groups in coal,and studied the activity variation characteristics of coal,meanwhile,analyzed the microscopic mechanism of effects that the drying temperature of coal had.The results demonstrate that coal itself produces the active chemical reaction in the thermal reaction,methylene group is less after increased,hydroxyl gradually decreases,carboxyl reduces gradually after a period of smooth,carbonyl also reduces after increased,coal＇s own activity also undergoes great changes,the total proportion of active functional groups active functional groups gradually decreases.It is sure that temperature below 40 ℃ is the most suitable temperature for drying.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第9期1528-1532,共5页
Journal of China Coal Society
基金
国家专项基金资助项目(50927403)
江苏省创新攀登计划资助项目(BK2009004)
国家青年科学基金资助项目(51004105)
关键词
低阶煤
原位
红外光谱
峰拟合
干燥温度
low rank coal
in-situ
FTIR
peak fitting
drying temperature
