干酪根
油页岩
化学
热解
有机质
矿物学
黄铁矿
矿物
方解石
石英
高岭石
地质学
烃源岩
有机化学
构造盆地
古生物学
作者
A. Aboulkas,K. El Harfi
标识
DOI:10.1016/s1872-5813(10)60013-8
摘要
In this study, the kerogen of oil shale from Moroccan Tarfaya deposits was isolated and the changes in the initial organic matter during the removal of the mineral matrix were examined. Chloroform extraction of the oil shale increases the intensity of the peaks in the X-ray diffractograms. Infrared spectra and X-ray diffractograms reveal the presence of mineral, calcite, quartz, kaolinite, and pyrite in the mineral matrix of the oil shale. Hydrochloric and hydrofluoric acids dissolution do not alter the organic matter. The nonisothermal weight loss measurements indicate that thermal decomposition of the isolated kerogen can be described by first-order reaction. A single kinetic expression is valid over the temperature range of kerogen pyrolysis between 433 and 873 K. Furthermore, the results indicate that the removal of mineral matter causes a decrease in the activation energies of the pyrolysis reactions of oil shale.
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