热解过程中煤镜质体反射率变化及其对半焦性质的影响

The study on changes of average maximum reflectance of vitrinite and its effect on properties of char in course of pyrolysis of coals

主要针对热解过程中煤的镜质体平均最大反射率的变化规律进行了研究和探讨。研究结果表明，挥发分的逸出对煤的镜质体（Rmax^0）的变化影响较大；低变质程度煤比高变质程度煤的Rmax^0变化更为明显；在挥发分析出温度之后，煤的镜质体Rmax^0的变化与温度增加量近似成正比。

The change regularity average maximum reflectance of vitrinite in course of pyrolysis of coals is studied. The results showed that variation of average maximum reflectance of vitrinite （Rmax^0） is proportional to increment of temperature after generating volatile and the generation of volatile has great influence on the variation of Rmax^0. There are more obvious changes of Rmax^0 of low rank coal than that of high rank coal.