Abstract: Combustion reaction is the most important way of coal conversion，coal’s combustion parameter plays an important role in evaluating its ecological and economic indicators.The combustion characteristics are studied in this paper on six types of different rank power coals by thermogravimetric and fourier transform infrared spectrometry technique，respectively.The results show that each characteristic temperature and the temperature at which these gases，such as CO，CO₂ and H₂O released，become small with the decrease of the coal rank，contrarily weight loss of lower rank coal sample between each characteristic temperature increases.CO is generated at a lower temperature while CO₂ is mainly generated at a higher temperature.Both the variation of activation energy and the reaction order pass a maximum as the temperature increases in the combustion process.All the above observations indicate that lower rank coal is easier to combust than higher rank coal.

Key words:

煤, 燃烧, 动力学, 特征温度

摘要： 采用热重分析和红外光谱分析技术研究了6种不同变质程度动力煤的燃烧行为.结果表明：变质程度越低，煤的各燃烧特征温度越小，各特征温度点和相应温度区间的失量分数越大，H₂O、CO、CO₂气体的析出温度越低，且CO主要在低温区产生，高温区主要生成CO₂；煤的表观活化能和反应级数的变化规律相同，都是先增大，达最大值后再减小.上述结果说明煤的变质程度越低燃烧越容易.

关键词:

煤, 燃烧, 动力学, 特征温度