Solubility of Alkyl Amine Surfactants in Mixed Gas and Pure CO<sub>2</sub> Environments

Liebum, M; Hirasaki, George J.; Nguyen, Quoc P.

doi:10.1021/acs.iecr.7b02369

Cited by 7 publications

(3 citation statements)

References 23 publications

(55 reference statements)

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“…19,28,30 However, the P c was usually reported to increase with temperature for the surfactants in literature, which include trimethyl-nonyl-(ethylene oxide) n (noted as b-C12-EOn), nonyl-phenol-(ethylene oxide) n (noted as NP-EOn), 2-ethyl-hexanol-(ethylene oxide) n -(propylene oxide) m (noted as b-C8-EOn-POm), alkyl ethoxylated amines (noted as C12-14-EOn-A), and alkyl ditertiary-amine (noted as C16-18-DTA). 19,[28][29][30]34,36 The comparison of C8-16-DA with the surfactants in literature for the P c is shown in Figure 7. Therefore, the surfactants in literature require a higher pressure for dissolving in CO 2 at higher T, which may restrain their application in the hot reservoirs.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Novel Alkyl-Amine Surfactants for CO₂ Emulsion Assisted Enhanced Oil Recovery

2018

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Novel CO2-soluble surfactants are designed for generating stable CO2 emulsion/foam at high temperature (110 °C) and high salinity (220 g/L NaCl). The novel surfactants only consist of alkyl chains and amine heads without any fluorine, silicon, or poly alkyl-oxide groups and outperform the surfactants in literature regarding the solubility, thermal stability, and emulsifying ability in harsh conditions. 0.2 wt % of the novel surfactants are soluble in 220 g/L NaCl brine at pH ≤ 8 from 20 to 120 °C and are soluble in CO2 at high temperature (110 °C) and relatively low pressure (91 bar). The surfactants are thermally stable at 110 °C and pH = 4 under anaerobic conditions. Strong CO2 emulsion can be readily generated in bulk and in porous media at 25–110 °C and 150 bar. Unlike the common surfactants in literature, the performance of the novel surfactants can be profoundly enhanced by salinity and temperature. The strategy for designing these novel molecules and tuning the surfactant formulation for emulsion-assisted CO2 enhanced oil recovery (EOR) is discussed as well.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Novel Alkyl-Amine Surfactants for CO₂ Emulsion Assisted Enhanced Oil Recovery

2018

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“…Liebum et al [100] tested the solubility of three alkylamine surfactants in scCO 2 and supercritical carbon dioxide-methane mixture (scCO 2 -scCH 4 ) under high-pressure conditions at 40 • C and 60 • C. It was observed that highly methylated surfactant structures had the highest solubility in scCO 2 , up to 1 wt% at 40 • C, and the solubility decreased exponentially with the addition of methane to the system. Because of the strength of the surfactant-scCO 2 intermolecular interaction, the scCO 2 preferred shorter tail groups.…”

Section: Hydrocarbon Surfactantsmentioning

confidence: 99%

Research of CO2-Soluble Surfactants for Enhanced Oil Recovery: Review and Outlook

Liang,

Luo,

Luo

et al. 2023

Molecules

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CO2 foam injection has been shown to be effective under reservoir conditions for enhanced oil recovery. However, its application requires a certain stability and surfactant absorbability on rock surface, and it is also associated with borehole corrosion in the presence of water. Adding surfactants to CO2 can enhance the interaction between CO2 and crude oil and control the CO2 mobility, thereby improving the performance of CO2 flooding. This paper presents a review of the research of CO2-soluble surfactants and their applications. Molecular dynamics simulation is introduced as a tool for analyzing the behavior of the surfactants in supercritical CO2 (scCO2). The applications of CO2-soluble surfactants, including CO2 thickening, reducing miscibility pressure, and generating supercritical CO2 foam, are discussed in detail. Moreover, some opportunities for the research and development of CO2-soluble surfactants are proposed.

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“…Meanwhile, an apparent free gas phase will increase with the vaporization of an oleic lighter component into ScCO 2 . This CO 2 phase composition change would directly cause the reduction of CO 2 -soluble surfactant partition coefficients 68 and variation of foam apparent viscosity. 69 On the contrary, the decrease of the free gas phase during the condensing process could reduce the delivery efficiency of CO 2soluble surfactants and apparent foam viscosity, which is equivalent to suppress the spreading effect.…”

Section: Sensitivity Studies 231 Spreading Effect Caused Bymentioning

confidence: 99%

Numerical Assessments of Key Aspects Influencing Supercritical CO₂ Foam Performances when Using CO₂-Soluble Surfactants

Ren

2020

Energy Fuels

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Experimentally, supercritical CO 2 -soluble surfactant foams have displayed significant superiorities over conventional aqueous soluble one in promoting foam strength, accelerating surfactant/foam propagation, and enhancing oil recovery. It was observed that the eventual foam performances could be the counterbalance results of faster foam propagation and reduced local pressure gradient characterized by the magnitudes of partition coefficients between CO 2 /aqueous, which was designated as spreading effect. This paper aims to numerically investigate the key aspects influencing supercritical CO 2 -soluble surfactant foam performances in a homogeneous analogue system, with respect to injection periods, critical foaming concentration and surfactant adsorption determined by the surfactant structure, and injection foam quality. It is found that stepwise oil production consists of three stages in sequence attributed to the distinct recovery mechanisms. The optimal partition coefficient for a studied system cannot be derived directly by the absolute value of the surfactant partition coefficient but is affected by the employed rock, fluids, and injection conditions. The less EO group endues higher partition capacity and adsorption on the rock surface simultaneously. The tradeoff results in the least adverse impact for high partition capacity surfactants even though the optimal value shifts to the lower end. The impacts of injection foam quality are the combination of the total injection rate, amount of injection fluids, miscibility between Gas/ Oil, and surfactant spreading. Surfactant partition coefficient values determine the eventual impacts of promoted or suppressed spreading effects. The studies in this article promote the understandings of this novel technology to maximize the oil recovery as well as CO 2 utilization.

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Solubility of Alkyl Amine Surfactants in Mixed Gas and Pure CO₂ Environments

Cited by 7 publications

References 23 publications

Novel Alkyl-Amine Surfactants for CO₂ Emulsion Assisted Enhanced Oil Recovery

Novel Alkyl-Amine Surfactants for CO₂ Emulsion Assisted Enhanced Oil Recovery

Research of CO2-Soluble Surfactants for Enhanced Oil Recovery: Review and Outlook

Numerical Assessments of Key Aspects Influencing Supercritical CO₂ Foam Performances when Using CO₂-Soluble Surfactants

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Solubility of Alkyl Amine Surfactants in Mixed Gas and Pure CO2 Environments

Cited by 7 publications

References 23 publications

Novel Alkyl-Amine Surfactants for CO2 Emulsion Assisted Enhanced Oil Recovery

Novel Alkyl-Amine Surfactants for CO2 Emulsion Assisted Enhanced Oil Recovery

Research of CO2-Soluble Surfactants for Enhanced Oil Recovery: Review and Outlook

Numerical Assessments of Key Aspects Influencing Supercritical CO2 Foam Performances when Using CO2-Soluble Surfactants

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Product

Resources

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Solubility of Alkyl Amine Surfactants in Mixed Gas and Pure CO₂ Environments

Novel Alkyl-Amine Surfactants for CO₂ Emulsion Assisted Enhanced Oil Recovery

Novel Alkyl-Amine Surfactants for CO₂ Emulsion Assisted Enhanced Oil Recovery

Numerical Assessments of Key Aspects Influencing Supercritical CO₂ Foam Performances when Using CO₂-Soluble Surfactants