Characterization of α-olefin sulfonate foam in presence of cosurfactants: Stability, foamability and drainage kinetic study

Verma, A. K.; Chauhan, Geetanjali; Ojha, Keka

doi:10.1016/j.molliq.2018.05.061

Cited by 47 publications

(26 citation statements)

References 39 publications

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“…This phenomenon, i.e. the increasing of foam stability with surfactant concentration, was also observed in previous studies (51,52,53). However, the values of half-life time dropped after 2 × CMC and were almost constant when surfactant concentration increased further.…”

Section: Fig 2 Surface Tension As a Function Of Surfactant Concentrationsupporting

confidence: 86%

Experimental Study of Non-Newtonian Behavior of Foam Flow in Highly Permeable Porous Media

Omirbekov

Davarzani

Ahmadi-Sénichault

2020

Ind. Eng. Chem. Res.

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Foam-flow behavior in highly permeable porous media is still unclear. Two types of pre-generated foam using porous columns respectively filled with fine sand and 1 mm glass beads were studied in different packs of glass beads with monodisperse bead size. Foam generated in fine sand had a sharp displacing front. However, the foam pre-generated using 1 mm glass beads had a transition zone front. We found that the transition foam-quality regime was independent of the porous medium grain size only when the bubbles are smaller than the pores. The apparent viscosity of foam was found to follow the Herschel-Bulkley model if the foam bubble sizes were smaller than the pore sizes. When the bubbles were the same size as the pores, the foam behaved like a Newtonian fluid at low flowrates and, by increasing flowrates, exhibited shear-thinning fluid behavior. Furthermore, the apparent foam viscosity was found to increase with permeability.

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Section: Fig 2 Surface Tension As a Function Of Surfactant Concentrationsupporting

confidence: 86%

Experimental Study of Non-Newtonian Behavior of Foam Flow in Highly Permeable Porous Media

Omirbekov

Davarzani

Ahmadi-Sénichault

2020

Ind. Eng. Chem. Res.

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“…The results show the AOS solution rapidly formed foam, and as the concentration increased, the foam volume increased as well until the concentration exceeded 0.4 wt.% [16]. However, the rapidly formed foam also appeared to be generally unstable [16,17]. These results were further confirmed with a similar study done by Wang et al [18].…”

Section: Introductionsupporting

confidence: 69%

“…[15]. Two studies analysed the effects of AOS surfactants on foam stability completed by Chen et al and Verma et al [16,17]. The results show the AOS solution rapidly formed foam, and as the concentration increased, the foam volume increased as well until the concentration exceeded 0.4 wt.% [16].…”

Section: Introductionmentioning

confidence: 99%

High‐performance sulphate‐free cleansers: Surface activity, foaming and rheology

Yorke

Potanin

Jogun

et al. 2021

Intern J of Cosmetic Sci

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Objective The main objective of this paper is to analyse the composition of a sulphate‐free binary or ternary surfactant system with alkyl olefin sulfonate (AOS), alkyl polyglucoside (APG) and lauryl hydroxysultaine (Sultaine). The composition was optimized by observing critical parameters such as surface activity and rheological properties while varying the concentration of APG in a ternary system, varying the ratio of AOS and Sultaine in a binary system and studying the effect of sodium chloride addition. The experimental results can provide an alternative, sulphate‐free surfactant system to replace the common system containing sodium laureth sulfate (SLES) and cocamidopropyl betaine (CapB), without compromising on the parameters previously mentioned. Methods A DuNouy Ring was utilized on a tensiometer to measure the surface tension of the samples. To observe foaming abilities of samples, a visual foaming study was conducted and recorded by taking pictures. A TA instruments mechanical rheometer was used to measure the viscosity. Results Studying the effect of APG concentration on surface tension illustrated that as APG concentration decreases, surface tension decreases as well. The minimum surface tension was found to be 26.587 for 7.5 wt.% AOS and 7.5 wt.% Sultaine. When the ratio between AOS and Sultaine changed, the 1:1 system produced the lowest surface tension value again. As the concentration of AOS decreased in the ratio, the surface tension increased. When the ratio was held constant, and APG was introduced into the system, the systems containing APG had higher surface tension values compared with the systems with the same ratios but did not have APG added. As the concentration of salt increased, the surface tension decreased for AOS, increased for the binary mixture and had no effect on Sultaine. Foaming has a direct correlation with surface tension so a decrease in surface tension led to better foaming abilities; therefore, the 1:1 ratio of AOS:Sultaine had the best foaming qualities. The AOS/Sultaine system exhibited Maxwellian behaviour, suggesting the presence of worm‐like micellar structures. As the concentration of APG increased, the viscosity decreased and at a concentration of 2.5 wt.% AOS, 5 wt.% APG and 7.5 wt.% Sultaine, the system changed from shear thinning non‐Newtonian fluid to Newtonian. Varying the ratio of AOS:Sultaine in the binary system, showed as the ratio changed, the viscosity decreased, and at a ratio of 1:3 AOS:Sultaine, the system was primarily Newtonian. As the ratio remained constant and APG was added, the viscosity continued to decrease and the 1:3 ratio was completely Newtonian. The addition of salt had no effect on the viscosity of Sultaine, but the viscosity of AOS increased at a salt concentration of 2 wt.%. The binary mixture saw as the concentration of salt increased, the viscosity profile decreased, even though the system remained non‐Newtonian and shear thinning. Conclusion The surface activity and rheological study of the sulfate‐free surfactant systems u...

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“…Interface properties such as interfacial tension and surface forces affect the foam stability. A surfactant having low surface tension and high surface viscoelasticity is generally considered a good foaming solution [15]. In freshly generated foam, the lamellae between two foam bubbles are thick, but the film starts thinning as liquid drains out of the lamella due to capillary pressure and gravity.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

Kamal

2019

Energies

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Selection of surfactants for enhanced oil recovery and other upstream applications is a challenging task. For enhanced oil recovery applications, a surfactant should be thermally stable, compatible with reservoir brine, and have lower adsorption on reservoir rock, have high foamability and foam stability, and should be economically viable. Foam improves the oil recovery by increasing the viscosity of the displacing fluid and by reducing the capillary forces due to a reduction in interfacial tension. In this work, foamability and foam stability of two different surfactants were evaluated using a dynamic foam analyzer. These surfactants were fluorinated zwitterionic, and hydrocarbon zwitterionic surfactants. The effect of various parameters such as surfactant type and structure, temperature, salinity, and type of injected gas was investigated on foamability and foam stability. The foamability was assessed using the volume of foam produced by injecting a constant volume of gas and foam stability was determined by half-life time. The maximum foam generation was obtained using hydrocarbon zwitterionic surfactant. However, the foam generated using fluorinated zwitterionic surfactant was more stable. A mixture of zwitterionic fluorinated and hydrocarbon fluorinated surfactant showed better foam generation and foam stability. The foam generated using CO2 has less stability compared to the foam generated using air injection. Presence of salts increases the foam stability and foam generation. At high temperature, the foamability of the surfactants increased. However, the foam stability was reduced at high temperature for all type of surfactants. This study helps in optimizing the surfactant formulations consisting of a fluorinated and hydrocarbon zwitterionic surfactant for foam injections.

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Characterization of α-olefin sulfonate foam in presence of cosurfactants: Stability, foamability and drainage kinetic study

Cited by 47 publications

References 39 publications

Experimental Study of Non-Newtonian Behavior of Foam Flow in Highly Permeable Porous Media

Experimental Study of Non-Newtonian Behavior of Foam Flow in Highly Permeable Porous Media

High‐performance sulphate‐free cleansers: Surface activity, foaming and rheology

A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

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