一个可用于比较煤焦反应性的判据

提出一个可用于比较煤焦反应性的通用判据，以消除因研究对象含碳量不同而带来的判断误差.定义试样在热天平非等温实验中的最大失重速率与该样品干燥无灰基含碳量的商为最大比失重速率，采用最大比失重速率对不同煤种、同一煤种的不同宏观煤岩和同一宏观煤岩不同燃尽度煤焦等试样的反应性进行了判断，同时与采用其他判据的判断结果作了对比.结果表明，最大比失重速率作为比较物质反应性的判据具有一定的通用性，能够较好地区分不同煤焦之间的反应性;热天平试验升温速率对判断结果没有影响.

A parameter used for judging char reactivity

In order to eliminate the judgment error of char reactivity arising from different carbon content of samples,a new parameter called specific maximum weight loss rate was introduced,defined as the quotient of the maximum weight loss rate in non-isothermal thermogravimetric analysis(TGA) experiment to the carbon content of corresponding sample.The reactivity of different kind of coals,the reactivity of the same coal with different lithotype,and the reactivity of char with different carbon conversion rate were checked by using the specific maximum weight loss rate,and the results were analyzed and compared with those obtained by using other criteria.Results show that the specific maximum weight loss rate can be used as a commonality parameter to evaluate and distinguish the reactivity of different coal and char,and that the heating rate selected in TGA experiment has no effect on the judgment.