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      Synthesis of Guerbet Amine-Oxide for Enhanced Oil Recovery

      Author(s): 1 , 2 , 1 , 2 , 2 , 2 , 2
      Publication date Created:
      Publication date (Print):
      Journal: Journal of Chemistry
      Publisher: Hindawi Limited

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          Abstract

          Guerbet amine-oxide was synthesized by using Guerbet acid, N, N′-diethyl-1,3-propanediamine and hydrogen peroxide. Its structure was confirmed by FT-IR spectra and mass spectra. The critical micelle concentration (CMC) and the interfacial tension between the crude oil and water were measured. The results showed that the CMC of the Guerbet amine-oxide is 2.14 × 10 −5 mol/L and the interfacial tension could be lowered to ultralow levels. The core flood test showed that the surfactant and polymer binary system could increase oil recovery by 24.7% above the water flood.

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          New surfactant developments for chemical enhanced oil recovery

          Jun Lu, Pathma Jith Liyanage, Sriram Solairaj … (2014)
          Article 0 comments Cited 23 times – based on 0 reviews     Review now
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            Interfacial tension of oil/water emulsions with mixed non-ionic surfactants: comparison between experiments and molecular simulations

            P. Posocco, A Perazzo, V. Preziosi … (2016)
            Smaller Span molecules occupy the free spaces between bulkier Tween molecules thus lowering interfacial tension as compared to those obtained for single surfactant systems. Stable oil/water emulsions are usually obtained by using mixtures of different surfactants. Such systems display synergistic interface stabilizing effects, which have not been fully elucidated yet. Moreover, in many applications surfactants are added at concentrations well above their critical micellar concentration (CMC), and this regime has not been thoroughly explored in the literature as well. Here, we investigate oil/water emulsions through oil/water interfacial tension using two common non-ionic surfactants, Tween 80 and Span 20, in the concentration range C (0.3–1 wt%) well above their respective CMCs. Mesoscale molecular simulations coupled interfacial tensiometry experiments to characterise these interfaces at a molecular level. Interfacial tension γ was measured by a pendant drop technique. Coarse-grained calculations provided a microscopic view of the interface at the molecular level ( i.e. surfactant arrangement, interface thickness), and were employed to extend the study to those surfactant concentrations where experiments could hardly provide reliable data, if any. We found a significant synergistic effect between Tween 80 and Span 20, with low molecular weight Span molecules occupying free spaces between the much larger, bulky Tween compounds. The surfactant intermolecular interactions could be associated to a striking decrease of interfacial tension in going from pure surfactants to a mixture at the same total weight concentration. Furthermore, the interface was found to exhibit a spatial inhomogeneity with a “patch-like” organisation, reminiscent of microphase separation. Our results show that the proposed, combined experimental/ in silico approach provides relevant insights for several industrial applications, such as emulsion stability and oil spill remediation.
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              Investigation of interfacial and structural properties of CTAB at the oil/water interface using dissipative particle dynamics simulations.

              Yiming Li, Yingyan Guo, Mutai Bao … (2011)
              We have used dissipative particle dynamics (DPD) to simulate the system of cetyltrimethylammonium bromide (CTAB) monolayer at the oil/water interface. The interfacial properties (interfacial density, interfacial thickness, and interfacial tension), structural properties (area compressibility modulus, end to end distance, and order parameter), and their dependence on the oil/water ratio and the surfactant concentration were investigated. Three different microstructures, spherical oil in water (o/w), interfacial phase, and water in oil (w/o), can be clearly observed with the oil/water ratio increasing. Both the snapshots and the density profiles of the simulation show that a well defined interface exists between the oil and water phases. The interface thickens with CTAB concentration and oil/water ratio. The area compressibility modulus decreases with an increase in the oil/water ratio. The CTAB molecules are more highly packed at the interface and more upright with both concentration and oil/water ratio. The root mean square end-to-end distance and order parameter have a very weak dependence on the oil/water ratio. But both of them show an increase with CTAB concentration, indicating that the surfactant molecules at the interface become more stretched and more ordered at high concentration. As CTAB concentration increases further, the order parameter decreases instead because the bending of the interface. At the same time, it is shown that CTAB has a high interfacial efficiency at the oil/water interface.
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                Author and article information

                Journal
                Title: Journal of Chemistry
                Abbreviated Title: Journal of Chemistry
                Publisher: Hindawi Limited
                ISSN (Print): 2090-9063
                ISSN (Electronic): 2090-9071
                Publication date Created: February 19 2020
                Publication date (Print): February 19 2020
                Volume: 2020
                Pages: 1-6
                Affiliations
                [1 ]China University of Geosciences, Beijing 100083, China
                [2 ]Research Institute of Exploration and Development, PetroChina Huabei Oilfield Company, Renqiu 062550, China
                Article
                DOI: 10.1155/2020/5930912
                SO-VID: 07619822-346d-48af-a5c4-b31e82a4c456
                Copyright © © 2020
                License:

                http://creativecommons.org/licenses/by/4.0/

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