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对煤自燃过程进行了绝热氧化实验模拟,获得了9个典型煤样自燃过程升温曲线,并通过计算得到煤样自燃过程中每升高10℃时活化能随温度的变化曲线,得出了煤自燃过程中活化能随温度升高而逐渐降低的规律.在分析实验结果的基础上,提出了煤自然活化反应机理,即温度越高,煤自然活化需要的活化能越小,煤越容易被活化.定义了零活化能、初始活化能和零活化能温度的概念.零活化能与零活化能温度都是煤从被动氧化到自发反应的临界值.推导出了初始活化能、零活化能温度与R70值的关系式.
Adiabatic oxidation experimental simulation of spontaneous combustion of coal was carried out. Nine typical curves of spontaneous combustion of coal samples were obtained. The curves of activation energy versus temperature for every 10 ℃ increase were obtained by calculation. Spontaneous combustion process, the activation energy gradually decreases with increasing temperature.Based on the analysis of experimental results, the natural activation reaction mechanism of coal is proposed, that is, the higher the temperature, the smaller the activation energy required for natural activation of coal and the easier it is to be Activation. The concepts of zero activation energy, initial activation energy and zero activation energy are defined. The zero activation energy and zero activation energy are the critical values of the reaction from passive oxidation to spontaneous reaction. The initial activation energy, Temperature and R70 value of the relationship.