摘要
为了深入了解煤自燃发生发展过程,对煤自燃过程进行了绝热氧化模拟,获得了煤自燃过程升温曲线,得出煤自燃过程活化能随温度升高而逐渐上升的规律,同时对煤低温氧化过程微观结构变化规律进行了红外光谱测试.在充分研究煤自燃过程宏观特性和微观结构变化之间关系的基础上,提出了煤自燃逐步自活化反应机理:煤结构中不同官能团(活性结构)活化需要的温度与能量不一样,先被活化而发生氧化反应的官能团释放能量使其它需要更高活化温度和能量的官能团活化而进一步与氧发生反应释放更多能量,煤自燃过程是不同官能团依次分步渐进活化而与氧发生反应的自加速升温过程.
In order to understand the process bustion of coal was simulated with adiabatic of coal self-ignite, the process of spontaneous comoxidation, and the temperature-time curves and the rule that activation energy increases with temperature rise were obtained. The change of coal＇s micro-structure during low temperature oxidation was tested by infrared spectrometry. Based on studying the relationship between macro-properties and micro-structural changes, the gradual self-activation reaction theory of coal spontaneous combustion was proposed. Different active structures in coal need different activation energy to activate when coal is oxidized at low-temperature. The active structures, which need low activation energy, react with oxygen earlier than those need higher activation energy, and the temperature of coal is rising because heat is generating. As the temperature rises, more and more active structures are activated and reaet with oxygen and more heat is generated. The spontaneous combustion of coal is a process of active structures being activated and oxidized step by step.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2007年第1期111-115,共5页
Journal of China University of Mining & Technology
基金
国家重点基础研究发展规划(973)项目(2005CB221500)
河南省煤矿瓦斯与火灾防治重点实验室开放基金(HKLGF200507)
关键词
煤自燃
煤结构
活化能
官能团
spontaneous combustion of coal
coal structure
activation energy
function group
