Abstract: Based on thermogravimetric analyzer （TG），Fourier transform infrared （FTIR）and spectrometer and mass （MS） three-line profits for Gansu oil shale were studied by FTIR analysis and pyrolysis. The chemical composition and chemical structure of the sample was obtained through analyzing the spectra. The results showed that the chemical structures of samples are characterized by relatively higher amounts of aliphatic groups which is composed of TGA/FTIR/MS spectrometer. Experimental results indicates the whole pyrolysis process could be divided into two stages，as low temperature and high temperature ones. While pyrolysis behavior mainly occurred in low temperature stage（400—600℃），during which weigh loss ratio of oil shale is up to 70%，and volatile substance rapidly degraded in whole. In pyrolysis process，evolved gas such as H2，H2O，CO2，CH4，CO，SO2 and light hydrocarbon，pyrolysis productivity of oil shale is much lower in high temperature stage （600—850℃）. It is a small amount vapor decomposed from carbonate of mineral substance in this stage. This paper is to investigate the evolved gas from two pyrolysis stages，disclose the composition，the time and the mechanism of gas evolution，and reach the chemical reaction kinetics parameters of pyrolysis.

Key words: oil shale, pyrolysis, TG-FTIR-MS, kinetic modeling

摘要： 基于热重分析仪（TG）、傅里叶变换红外光谱分析仪（FTIR）和质谱分析仪（MS）三机联用对甘肃油页岩进行光谱和热解实验。通过分析光谱谱图，得到了样品中的化学成分和化学结构的相关信息。结果表明，其化学结构的特征在于相对较高量的脂肪族基团。在TG/FTIR/MS三联机上研究了甘肃油页岩的热解特性，实验结果表明：整个热解过程主要有两个阶段，即低温段和高温段。大部分的热解行为发生在低温段（400～600℃），此阶段里油页岩的失重量占总失重量的70%，可挥发物质迅速热解，热解产生的气体有H2、H2O、CO2、CH4、CO、轻质烃等。而在高温段（600～850℃）的热解气体产率很小，失重量只占总重量的2.167%。这个阶段主要是含碳酸盐的矿物质分解而产生一定量的气体。本文主要研究两个热解阶段产生的气体。对产生气体的种类、时间和产生机理进行了研究，并得出热解的化学反应动力学参数。

关键词: 油页岩, 热解, TG-FTIR-MS, 动力学模型