Abstract: To study the relationship between the structure of oil shale and its pyrolysis, a series of experiments for Gansu oil shale was performed at heating rates of 5, 20, 50℃·min^-1 using a TG-FTIR (Thermogravimetric Analysis-Fourier Transform Infrared Spectroscopy) analyzer. The CH₄, CO, CO₂, H₂O and tar produced by pyrolysis were quantitatively analyzed. The kinetic parameters were calculated with a nonlinear least-squares curve-fitting method. The FG-DVC (Functional Group-Depolymerization Vaporization Crosslinking) model, which was established based on the structure of fuel, was employed to quantitatively predict the product yields of pyrolysis. The results showed that devolatilization reaction taken mainly place at temperature rangeof 200-600℃. Aliphatic hydrocarbon was predominant organic functionalgroup in shale oil. The initial temperature for release of gaseous products had different order due to various activities of functional groups. The calculated activation energy (E) was basicly between 188-239 kJ·mol^-1, and the pre-exponential factor (A) was between 10⁹-10¹³ s^-1. Good agreement was observed between the model prediction and TG-FTIR experimental results for the oil shale studied, indicating that the pyrolysis process of Gansu oil shale could be well described by the FG-DVC model.

Key words: oil shale, pyrolysis, TG-FTIR, gas, kinetics, FG-DVC model

摘要： 为研究油页岩结构与热解反应性之间的关系，在TG-FTIR分析仪上对甘肃油页岩在不同升温速率条件下（5、20、50℃·min^-1）进行了热解实验研究，对CH₄、CO、CO₂、H₂O和页岩油进行了定量分析，并采用非线性最小二乘拟合方法求解各组分析出的动力学参数，同时采用基于燃料化学结构的FG-DVC模型对各组分的析出过程进行了模拟。结果表明：油页岩的脱挥发分过程主要发生在200～600℃之间；油页岩中有机质所含官能团以脂肪烃为主；由于各官能团活性不同，导致气态产物的析出有先后顺序；由非线性最小二乘拟合方法获得的各种产物析出的活化能E分布在188～239 kJ·mol^-1之间，而指前因子A在10⁹～10¹³ s^-1之间；各产物的FG-DVC模拟结果与实验数据较为相符，这说明用FG-DVC模型来描述甘肃油页岩的热解脱挥发分过程是比较合适的。

关键词: 油页岩, 热解, TG-FTIR, 气体, 动力学, FG-DVC模型