摘要
为了解油页岩的热解特性,提升油页岩热解工艺的安全性,分析了油页岩在不同升温速率下的热解特性以及不同热解终温下的表征特征,通过等转换率法计算了油页岩的表观活化能,并确定出机理函数,从而进一步评估了油页岩热分解过程的安全性.结果表明:随着升温速率的增加,油页岩的热解向高温区移动,且热滞后现象明显,油页岩的活化能随其转化率的增加而增大.根据所获得的参数对油页岩热解过程进行评估,结果显示热解温度从室温升至800℃时热解危险性较低.同时,发现绝热条件下到达最大反应速率的时间为24 h所对应的初始温度(T_(D24))会随着升温速率的增加而减小.
In order to understand the pyrolysis characteristics of oil shale and improve the safety of the oil shale pyrolysis process,the pyrolysis characteristics of oil shale at different heating rates and the characterization characteristics at different pyrolysis final temperatures were analyzed.The apparent activation energy of oil shale was calculated using the equal conversion rate method,and the mechanism function was determined to further evaluate the safety of the oil shale pyrolysis process.The results show that with the increase of heating rate,the pyrolysis of oil shale moves towards the hightemperature zone,and the thermal hysteresis phenomenon is obvious.The activation energy of oil shale will increase with the increase of its conversion rate.Based on the obtained parameters,the pyrolysis process of oil shale was evaluated,and the results showed that the pyrolysis risk was lower when the pyrolysis temperature was raised from room temperature to 800℃under this pyrolysis condition.At the same time,it was found that the initial temperature(T_(D24))corresponding to the time to reach the maximum reaction rate under adiabatic conditions,which is 24 h,decreases with the increase of heating rate.
作者
白亚平
曹秀平
张福群
刘冰心
BAI Yaping;CAO Xiuping;ZHANG Fuqun;LIU Bingxin(Shenyang University of Chemical Technology,Shenyang 110142,China.)
出处
《沈阳化工大学学报》
2024年第5期457-463,共7页
Journal of Shenyang University of Chemical Technology
基金
辽宁省自然科学基金(LJ2020027)
辽宁省教育厅高校基本科研项目(LJ212410149014)。
关键词
油页岩
风险评估
热重差热分析
反应温度
oil shale
risk assessment
thermogravimetric differential thermal analysis
reaction temperature
