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Adsorption Characteristics of Illite and Kerogen Oil Phase: Thermodynamics Experiments

干酪根 伊利石 吸附 热力学 化学 矿物学 相(物质) 地球化学 地质学 材料科学 石油工程 色谱法 粘土矿物 烃源岩 有机化学 物理 古生物学 构造盆地
作者
Xinyu Tang,Jing Xiong,Yanming Zhu,Renren He,Xiangru Chen,Q CHEN,Zhengxin Yan,Cheng Liu,Lei Ma
出处
期刊:Minerals [Multidisciplinary Digital Publishing Institute]
卷期号:14 (6): 579-579
标识
DOI:10.3390/min14060579
摘要

In order to study the adsorption process and adsorption characteristics of shale oil at the macro scale, the isothermal adsorption experiments of illite and kerogen on a heptadecane (oil phase) solution were carried out by infrared spectrophotometry and gas chromatography–mass spectrometry. Based on the adsorption isotherm model and adsorption thermodynamic model, the characteristics of heptadecane adsorbed by illite and kerogen at different temperatures and oily solution concentrations were studied. The experimental results show that the concentration and temperature of the alkane solution help to enhance the adsorption and increase the saturated adsorption capacity. The difference is that the concentration will have a certain effect on the adsorption rate, while the temperature will not. Based on the three adsorption isotherm models, it was found that Langmuir and Freundlich were more suitable for describing the adsorption process of the heptadecane solution by illite and kerogen, and the adsorption characteristics of heptadecane molecules at different temperatures and adsorbents were evaluated. Heating leads to an increase in the collision efficiency between adsorbate molecules and adsorbents, thereby accelerating the migration rate of alkanes. Therefore, increasing temperature helps to enhance the adsorption capacity of rocks and increase the saturated adsorption capacity of minerals. The research results clarify the adsorption characteristics of shale oil heavy components from the macro level and fill the research gap in the application of solid–liquid isothermal adsorption physical experiments on the adsorption and occurrence of shale oil.
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