CO_2与N_2抑制煤炭氧化自燃对比实验研究

A Experiment Contrast Study of CO_2 and N_2 Inhibited Oxidation of Spontaneous Combustion of Coal

在分析CO2与N2抑制煤层自燃氧化机理的基础上,将兴隆庄矿煤样分别通入CO2和N2气体惰化12h后,利用油浴程序升温实验系统对比分析程序升温实验过程中煤样CO产生率和耗氧速率等参数变化特征。实验表明:吸附CO2气体的煤样在脱附完成后CO的产生量小;煤样中吸附的CO2煤体随温度升高脱附量越大,当煤体温度达到140℃以上时,基本完全脱附,随后煤自燃特性与未吸附的煤样基本一致;在干裂温度下,煤样吸附CO2后比吸附N2煤样CO产生量和耗氧速率小,CO2比N2抑制煤样自燃效果更好。

On the base of the analysis of CO2 and N2 inhibited spontaneous combustion of coal oxidation mechanism, CO2 and N2 passed into the coal samples of xinglongzhuang mine respectively, after inerting for 12h, using oil bath temperature - programmed experiment system compared and analyzed CO production rate and oxygen consumption rate parameters variation characteristics during the tempera- ture - programmed experiment. The experiment result showed that the coal samples of adsorping CO2 produced a small volume CO after desorption, the amount of desorption of the coal was greater with increasing temperature, and the desorption was basically completed when the coal temperature reached 140~C above, followed by spontaneous combustion of coal properties and not adsorption of the coal samples were basically the same; in dry temperature, the CO production and oxygen consumption rate of the coal sample adsorping CO2 was smaller than that of adsorbing N2, So CO2 was better than N2 in inhibiting spontaneous combustion of coal sample.