为阐明煤在无氧环境下升温过程中CO的产生及变化规律,利用程序控制升温和时间分辨红外光谱分析方法,在无氧环境下对煤进行程序控制升温,采集并分析了煤无氧升温过程中CO产生及变化规律的时间分辨红外光谱谱图,揭示了煤无氧升温过程中CO的产生和变化规律,建立了描述CO生成量与煤质量分数之间函数关系的方程.结果表明:在30 ～370℃,由于热解温度不够高,无CO产生;在煤失重最快的370～650℃,CO生成量随温度的升高而逐渐增大,并在641.5℃达到最大值;在650～800℃,由于与CO生成有关的活性官能团逐渐被消耗殆尽,CO生成量随温度升高逐渐减小并最终趋于零.%In order to understand the laws of generation and variability of CO in the process of oxygen-free programmed temperature of coal,the programmed temperature technology and time resolved spectroscopy were used to accomplish this experiment.The time resolved spectroscopy spectrograms were gathered during program control heating in oxygen-free conditions.The laws of generation and variability of CO were revealed.The equation was established to explain the functional relationship between the amount of CO generated and the mass fraction of coal.The study shows there are no CO generated within the scope of 30-370 ℃ due to low pyrolysis temperature.Within 370-650 ℃ in which the coal weight loss is fastest,the CO concentration increases gradually with increasing temperature,which reaches peak at 641.5 ℃.Within 650-800 ℃,the CO concentration decreases gradually and ultimately disappears with increasing temperature,because the oxygen-containing functional groups related to the CO generated are gradually depleted.
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