期刊
ENERGY & FUELS
卷 35, 期 21, 页码 17522-17535出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.1c02524
关键词
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资金
- TotalEnergies
- Chevreul Institute [FR 2638]
- Ministere de l'Enseignement Superieur et de la Recherche
- Region Nord-Pas de Calais
- FEDER
- COBRA Laboratory
- European Regional Development Fund (ERDF) [HN0001343]
- European Union's Horizon 2020 Research Infrastructures program [731077]
- Region Normandie
- Laboratoire d'Excellence (LabEx) SynOrg [ANR-11-LABX-0029]
- CNRS FTICR research infrastructure [FR3624]
A novel method for extracting crude oil surface-active species using three-phase microemulsions has been described, demonstrating effectiveness compared to the established wet-silica method. Analytical data suggests a correlation between the interfacial materials and the interfacial activity, stability, and equivalent alkane carbon numbers of the crude oil.
A novel method is described to extract crude oil surface active species. It is based on the formation of balanced three-phase microemulsions (optimum Winsor III systems) with a well-defined temperature-sensitive nonionic surfactant. The crude oil surface-active species are concentrated in the middle-phase microemulsion, which is separated. The interfacial material is then recovered in the surfactant-rich aqueous phase after cooling. This method was applied to five crude oils and the interfacial materials were then analyzed by Fourier transform ion cyclotron resonance mass spectroscopy (FT-ICR MS). This novel extraction method compares well with the established wet-silica method, as evidenced by the analysis in the negative electrospray ESI(-) mode of the interfacial materials of the same crude extracted by the two methods. The analytical data have been related to the interfacial activity of the crude oils, namely, their tendency to form stable emulsions with water or viscous phases in surfactant/oil/water systems at equilibrium, and to their equivalent alkane carbon numbers (EACN). The interfacial materials are confirmed to be responsible for the increased stability of water-in-oil emulsions.
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