Molecular Selectivity in Supercritical CO2 Extraction of a Crude Oil
Molecular Selectivity in Supercritical CO2 Extraction of a Crude Oil
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超临界 CO2 萃取原油的分子选择性
DOI：
10.1021/acs.energyfuels.7b00415
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发表时间：
2017-05-01
期刊：
影响因子：
5.3
通讯作者：
Shi, Quan
中科院分区：
文献类型：
--
作者：
Cao, Xin;Peng, Bo;Shi, Quan
超临界CO2驱油由于能有效提高原油采收率和促进温室气体的封存而被认为是一种很有前途的提高原油采收率方法。然而，不同的石油组分在超临界二氧化碳（SC-CO2）中的溶解度还没有得到很好的研究。研究了不同压力和温度下超临界CO2萃取原油的分子选择性。将原油负载在硅藻土表面，用超临界CO2萃取。采用气相色谱-质谱和傅立叶变换离子回旋共振质谱对超临界CO2萃取的萃取物和残留物进行了分析。结果表明，操作压力（20-30 MPa）对萃取率的影响大于温度（50-70 °C）。SC-CO2优先萃取芳香性和极性相对较低的小分子。含有多个杂原子的化合物类具有比烃更低的提取产率。车子...
Supercritical CO2 flooding has been considered as a promising enhanced oil recovery (EOR) method because it can effectively improve the oil recovery and promote greenhouse gas sequestration. However, the solubility of different petroleum components in supercritical carbon dioxide (SC-CO2) has not been well investigated. This paper presents the molecular selectivity of SC-CO2 extraction on crude oil under different pressures and temperatures. The crude oils were loaded on the surface of kieselguhr and extracted by SC-CO2. The extracts and residues from SC-CO2 extraction were analyzed by gas chromatography–mass spectrometry and Fourier transform ion cyclotron resonance mass spectrometry. Our results showed that the operating pressure (20–30 MPa) affected the extraction yields more than the temperature (50–70 °C). SC-CO2 preferentially extracted small molecules with relatively low aromaticity and polarity. Compound classes containing multiple heteroatoms had lower extraction yields than hydrocarbons. The car...