Volume 42, Issue 9 pp. 1952-1959
Research Article

Thermo-Rheology of a Proline-Based Surface-Active Ionic Liquid: Mixtures with Water and n-Octane

María Dolores Torres

María Dolores Torres

Universidade de Santiago de Compostela, Department of Chemical Engineering, rúa Lope Gómez de Marzoa, 15782 Santiago de Compostela, Spain

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Raquel Corchero

Raquel Corchero

Universidade de Santiago de Compostela, Department of Chemical Engineering, rúa Lope Gómez de Marzoa, 15782 Santiago de Compostela, Spain

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Iria Rodríguez-Escontrela

Iria Rodríguez-Escontrela

Universidade de Santiago de Compostela, Department of Chemical Engineering, rúa Lope Gómez de Marzoa, 15782 Santiago de Compostela, Spain

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Ana Soto

Ana Soto

Universidade de Santiago de Compostela, Department of Chemical Engineering, rúa Lope Gómez de Marzoa, 15782 Santiago de Compostela, Spain

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Ramón Moreira

Corresponding Author

Ramón Moreira

Universidade de Santiago de Compostela, Department of Chemical Engineering, rúa Lope Gómez de Marzoa, 15782 Santiago de Compostela, Spain

Correspondence: Ramón Moreira ([email protected]), Universidade de Santiago de Compostela, Department of Chemical Engineering, rúa Lope Gómez de Marzoa, 15782 Santiago de Compostela, Spain.Search for more papers by this author
First published: 17 May 2019
Citations: 9

Abstract

Surfactant flooding is one of the most promising techniques to recover oil from unprofitable reservoirs. Surface-active ionic liquids can overcome the limitations of the current surfactants. The rheology of the injecting solutions and the formed slugs is critical in the evaluation of an enhanced oil recovery process. The thermo-rheological behavior of a biodegradable surface-active ionic liquid, [ProC4]DS, and the corresponding binary and ternary mixtures with water and n-octane was studied. All flow curves exhibited shear-thinning and thixotropic behavior. The viscoelastic behavior of the ternary samples depended strongly on the [ProC4]DS content. Three different regions were identified: typical liquid-like behavior, weak gel, and true gel. The thermal profiles indicated that the tested systems were fully thermoreversible.

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