不同煤真空热解过程中气态产物的在线分析  

REAL-TIME ANALYSIS OF ORGANIC MATTER RELEASED DURING PYROLYSIS OF COAL WITH DIFFERENT RANK BY HIGH RESOLUTION MASS SPECTROMETER UNDER VACUUM CONDITION

作　　者：钮志远[1] 刘桂建[1] 尹浩[2] 

机构地区：[1]安庆师范学院资源与环境学院,安徽安庆讲师246011 [2]中国科学技术大学地球与空间学院,合肥硕士生230026

出　　处：《煤炭转化》2010年第3期5-9,共5页Coal Conversion

基　　金：国家自然科学基金资助项目(40873070);安徽省优秀青年基金资助项目(08040106909)

摘　　要：利用高分辨质谱对在真空热解过程中淮北烟煤、无烟煤和天然焦形成产物进行实时在线检测,结合煤质结构和特征,通过图谱分析了煤种和热解温度对热解产物的释放规律.结果表明,较低热解温度时,热解产物组成随煤化程度变化较小;较高温度时,随煤化程度的升高,高分子量产物相对含量逐渐减少;随着温度的升高,烟煤和无烟煤高分子量产物所占比例明显增加;含氧基团在200℃～400℃开始释放,到600℃则主要生成CO2.High resolution mass spectrometer is applied in on-line analysis of organic matter released during pyrolysis of coal with different rank from Huaibei coalfield under vacuum condition. The result shows that during 200℃-400 ℃, the component of compounds released by coals with different rank is similar, while the relative content of high molecular weight compounds decreases with increasing of coal rank at 600 ℃. The trend is also found that the ratio of aromatic hydrocarbons between high molecular weight and low molecular ones decreases with increasing of coal rank. As temperature increases, high molecular weight compounds of anthracite and bituminite greatly increase. Oxygen groups in coal start to crack during 200 ℃-400℃ and turn into CO2 at 600℃.

关 键 词：真空热解 煤种 质谱 在线分析 

分 类 号：TQ533[化学工程—煤化学工程]