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中文摘要：
煤的加压气化是煤清洁利用的关键，作为气化反应的初始阶段，煤热解特性对煤气化过程有着重要的意义。为了深入了解煤的加压热解机制，该文采用加压热重分析仪研究了我国的一种典型烟煤——神府煤在不同压力下的热解失重特性，采用挥发分释放综合特性指数（D）与非等温法，结合不同的扩散机制函数分析了神府煤加压热解动力学机制。研究发现神府煤的热解主要包括煤样的干燥脱水、挥发分的析出以及大分子焦油的二次裂解；加压对神府煤的热解过程有明显的影响，热解压力小范围的升高（〈0．8MPa）有利于挥发分的析出，然而过高的压力不利于挥发分的快速析出，挥发分释放综合特性指数可很好地表征神府煤加压热解过程中挥发分的析出特性。热动力学分析表明，三维球扩散模型比较适合神府煤的加压热解机制，低温段活化能随热解压力增大先增大后减小，但明显高于高温段热解活化能。
英文摘要：
Pressurized gasification is critical to the clean utilization of coal. As the initial step, pyrolysis is significant for the process of coal gasification. To catch the mechanism coal pressurized pyrolysis in depth, the pyrolysis of ShenFu coal was investigated using pressurized thermogravimetric analyzer under different pressures （0.1, 0.8, 1.5, 3 and 5MPa）. The kinetics propery was analyzed by overall index of volatile evolving （D） based on pyrolysis characteristics and non-isothermal method coupled with variant diffusing mechanism functions. The result indicates that the pressurized pyrolysis of ShenFu coal is mainly consisted of moisture removing, volatile releasing and secondary cracking of macromolecular tar. Pressure has great influence on the behavior of ShenFu coal pyrolysis. The enhance of pressure （〈0.8MPa） is beneficial for volatile releasing, however, after that, it suppresses volatile releasing. The overall index of volatile evolving （D） shows consistent result with volatile releasing behavior with pyrolysis pressure increasing. Three-dimension spherical diffusing mode is fit for the mechanism of ShenFu coal pressurized pyrolysis. The activation energy （E） of low temperature range is enlarged with pressure increasing and achieves the maximum value at 1.5 MPa, after that it diminishes with pressure increasing further. E of lower temperature range is much higher than that of higher temperature range.
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