油页岩干酪根热解产物特性研究

采用裂解色谱（PY-GC-MS）、电子顺磁共振波谱（EPR）和红外光谱（FTIR）等技术手段，分析了Estonia油页岩中干酪根及其热解产物的结构特性，研究了不同温度下中间产物与最终产物的关联性。结果显示：油页岩热解符合干酪根热解为中间产物热沥青，热沥青再热解为页岩油、干馏气和半焦等产物反应路径，中间产物热沥青的生成趋势反映了终产物的生成速率变化；H₂、CH₄和C₂~C₅组分主要来自热沥青中脂肪烃的芳构化、芳香族化合物烷基侧链的断裂及含氧化合物的缩聚等，干酪根热解产生的烷烃和烯烃类化合物是产油气的主要组分。干酪根和页岩油的自由基自旋浓度明显低于热沥青和半焦；半焦g值最大，干酪根次之，热沥青和页岩油的g值偏低。

STUDY OF PYROLYSIS PRODUCTS CHARACTERISTICS OF OIL SHALE KEROGEN

Py-GC-MS, EPR and FITR techniques were used to analyze the structural characteristics of kerogen and its pyrolysis products in Estonia oil shale. The relationship between the intermediate hot asphalt and the end products were studied at different temperatures. The results show that the pyrolysis of oil shale follows the pyrolysis path of kerogen into intermediate hot bitumen, and then bitumen into shale oil, retort gas and semi-coke. The generation trend of intermediate hot asphalt reflects the change of the growth rate of the final product. H₂, CH₄ and C₂-C₅ are mainly from the aromatization of aliphatic hydrocarbons in hot asphalt, the breaking of alkyl side chains of aromatic compounds and the condensation of oxygen-containing compounds, etc. The alkanes and olefin compounds produced by kerogen pyrolysis are the main components of oil and gas production. The free radical spin concentration of kerogen and shale oil is lower than that of hot asphalt and semi-coke. The g value of semi-coke is the biggest，that of kerogen takes the second place，and the g value of hot asphalt and shale oil is smallest.