摘要
本文应用傅里叶变换红外光谱(FTIR)和曲线拟合方法,对窑街油页岩流化床热解产物的表面官能团进行表征,揭示了页岩油中甲苯不溶物(TIM)的组成,并研究了热解温度和固相停留时间对热解半焦官能团变化的影响规律。结果显示,页岩油中TIM主要成分为脂肪族物质和矿物质,其红外光谱与飞灰和页岩油组合光谱高度吻合,证实了页岩油中TIM由超细飞灰和重质页岩油结合形成;随着热解温度上升,油页岩热解由热分解阶段进入缩合和芳构化阶段,脂肪族和含氧官能团逐渐减小至最终消失;停留时间主要影响热解反应中热分解和缩和反应比率,随着固相停留时间延长,反应逐渐从热分解占主导地位变为缩合占主导地位。
In order to reveal the composition of toluene insoluble materials(TIM) in shale oil and the effects of pyrolysis temperature and residence time of the solid-phase on pyrolysis chars,Fourier transform infrared spectroscopy(FTIR) analysis and curve-fitting method were used to study surface functional groups of Yaojie oil shale pyrolysates produced in fluidized bed.The results showed that the main component of Tim in shale oil were aliphatic substances and minerals.And TIM infrared spectrum was highly consistent with the spectrum combination of fly ash and shale oil,which confirmed TIM was formed by ultrafine fly ash and heavy shale oil.Along with the increase of pyrolysis temperature,pyrolysis reaction took the transition from hot thermal decomposition stage to polycondensation stage,accompanied by aliphatic and oxygen containing functional groups decreased and eventually disappeared.Residence time of the solid-phase mainly effected ratio of thermal decomposition and condensation.With the solid residence time prolonged,the dominant reaction transformed from thermal decomposition to condensation reaction.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2015年第3期660-664,共5页
Journal of Engineering Thermophysics
基金
国家国际科技合作专项项目(No.2014DFG61680)
