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采用升温速率为6.8K/min的热重装置对茂名油页岩非等温热解过程进行了考察。试样粒度<0.075mm(-200目),样层厚度0.6毫米,惰性气—氮气流量100ml/min。获得了茂名页岩热重曲线(TG)、热解失重速率与温度的关系曲线以及转化率与温度的关系曲线。对热重数据的动力学处理表明:茂名油页岩的热分解过程在三个不同的温度区间内可以很好地采用三个一级反应动力学方程予以描述。求取了这三个温区内页岩试样的热解动力学参数,即表观活化能E、指数前因子A和相应的反应速率常数表达式,并对茂名油页岩的热分解机理进行了初步的探讨。
The non-isothermal pyrolysis process of oil shale in Maoming was investigated with a thermogravimetry with a heating rate of 6.8 K / min. Sample size <0.075mm (-200 mesh), sample thickness 0.6 mm, inert gas - nitrogen flow 100ml / min. The thermogravimetric curve (TG) of Maoming shale was obtained. The relationship between pyrolysis weight loss rate and temperature and the relationship between conversion rate and temperature were obtained. Dynamic thermogravimetry data show that the thermal decomposition process of Maoming oil shale can be well described by three first-order reaction kinetic equations in three different temperature ranges. The pyrolysis kinetic parameters of the shale samples in these three temperature zones were obtained, namely the apparent activation energy E, the exponential factor A and the corresponding reaction rate constant expressions, and the thermal decomposition mechanism of the oil shale in Maoming Conducted a preliminary discussion.