摘要
为了进一步了解煤低温阶段氧化反应特点,运用鼓风恒温箱装置和GC-950型气相色谱仪对褐煤在80℃恒温密闭环境中CO的生成规律进行了研究,研究表明,当氧气浓度充足时,CO生成速率随着煤温的稳定而保持恒定,CO生成量呈线性增加,当氧气浓度下降后,CO生成速率随着恒温时间的延长呈递减趋势,并满足一定关系式。同时,利用电子自旋共振测谱仪(ESR)测试恒温过程不同时间的自由基浓度,从微观上揭示煤的氧化进程,并通过对比研究了80℃临界温度的特殊性。
To further understand features of coal oxidation in low temperature, device of blast oven and GC - 950 gas chromatograph were applied to make a study of CO concentration at 80 ℃ in confined space, study shows that CO growth rate keeps constant with invariable coal temperature and production of CO increases linearly when oxygen is sufficient. Once oxygen decreases, CO growth rate is in decline with extending of soak time, and there is a certain relation between them. Meanwhile, the variation of free radicals concentrations were studied using an electron spin resonance （ESR） spectrograph at different time in the isaothermal process, which reveals coal oxidation process in microcosm, comparative study is conducted to understand particularity of critical temperature 80 ℃.
出处
《煤矿安全》
CAS
北大核心
2014年第6期29-32,共4页
Safety in Coal Mines
基金
国家国际科技合作项目(2011DFA72310)
国家自然科学基金资助项目(51274146)
关键词
恒温阶段
限定封闭空间
CO浓度
CO生成速率
自由基浓度
isothermal stage
confined space
CO concentration
CO growth rate
free radicals concentration
