【摘要】 用热重-红外联用仪对油页岩及其半焦混合物的燃烧特性进行了动态分析,考察了掺混比例以及升温速率对燃烧的影响,得到了温度范围为30～850℃,在20,50和80℃/min三种不同升温速下的燃烧特性曲线。油页岩及其半焦混合物的整个燃烧过程分为燃烧低温段(着火温度Ti～500℃)、过渡段(500～680℃)和燃烧高温段(680～850℃)3个阶段。随着掺混油页岩比例的增大,混合物着火温度随挥发份含量的增加而明显降低。升温速率越高,所需要的温度和热量越大,峰温移向更高的温度。同时利用傅里叶变换红外光谱仪对燃烧生成气体进行了实时分析。采用二元一次线性回归法得到混合物燃烧反应动力学参数。在低温段活化能和频率因子随着升温速率的增加而降低,而在高温段则随着升温速率的增加而增大。计算结果为油页岩及其半焦混合物的有效开发和经济利用提供了理论基础。更多还原

【Abstract】 Thermal analysis and combustion characteristics of mixture of oil shale and oil shale semi-coke were investigated on TG-FTIR analyzer,with regard to comparing the process of the mixture with those of the individual components.Experiments were conducted at three heating rates of 20,50 and 80℃/min,in the temperature range of 30-850℃.Mainly three different reaction regions were observed in most of the samples studied.It was observed that ignition temperature decreased with increase of the oil shale proportion in the mixture.Distinguishing peaks shifted to higher temperatures with an increase in heating rate.At the same time,a Fourier Transform Infrared Radiation analyzer(FTIR)was used to analyze the composition gas in the real time.In kinetic calculations,combustion reaction kinetic parameters of mixture were calculated by binary linear regression.Apparent activation energies and frequency factors of low-temperature stage are lower,higher heating rates resulted in higher reaction energy at high-temperature stage in TG/DTG experiments.The results could provide theoretical foundation for further effective exploitation and economical application of oil shale.更多还原