A study of dynamic interfacial mechanisms for demulsification of water-in-oil emulsions

Kim, Y.H.; Wasan, Darsh T.; Breen, Patrick J.

doi:10.1016/0927-7757(94)03032-u

Cited by 119 publications

(82 citation statements)

References 8 publications

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“…Such a concept is especially important to the study of interfacial phenomena related to emulsion systems. Emulsion properties such as stability between droplets are often correlated with the interfacial tension between the two fluids (13)(14)(15)(16). However, as shown in the present study, the interfacial tension at emulsion droplet surfaces-the property that is of real relevance-may be quite different from what is quantified by conventional methods such as Du Noüy ring or drop volume tensiometry.…”

Section: Figcontrasting

confidence: 47%

Does Equilibrium Interfacial Tension Depend on Method of Measurement?

Yeung

Dąbroś

Masliyah

1998

Journal of Colloid and Interface Science

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Section: Figcontrasting

confidence: 47%

Does Equilibrium Interfacial Tension Depend on Method of Measurement?

Yeung

Dąbroś

Masliyah

1998

Journal of Colloid and Interface Science

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“…34 Some works have shown a good correlation between the performance of some commercial demulsifiers and the interfacial tension gradient, with the performance improving as the gradient declines. 35,36 Nevertheless, Djuve et al concluded that the reduction of the interfacial tension is one condition, but not alone sufficient for efficient demulsifier action. 37 Demulsification is a process in which an emulsion is destabilized by the addition of a demulsifier.…”

Section: Introductionmentioning

confidence: 99%

Effect of the structure of commercial poly(ethylene oxide-b-propylene oxide) demulsifier bases on the demulsification of water-in-crude oil emulsions: elucidation of the demulsification mechanism

et al. 2010

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Recebido em 29/10/09; aceito em 8/4/10; publicado na web em 24/8/10Water-in-crude oil emulsions are formed during petroleum production and asphaltenes play an important role in their stabilization. Demulsifiers are added to destabilize such emulsions,however the demulsification mechanism is not completely known. In this paper, the performances of commercial poly(ethylene oxide-b-propylene oxide) demulsifiers were studied using synthetic water-in-oil emulsions and model-systems (asphaltenes in organic solvent). No change in the asphaltene aggregate size induced by the demulsifier was observed. The demulsification performance decreased as the asphaltene aggregate size increased, so it can be suggested that the demulsification mechanism is correlated to the voids between the aggregates adsorbed on the water droplets surface.

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“…An interfacial tension gradient is induced by resins and asphaltenes, which mainly compose the interfacial film. They behave like a mechanical barrier that avoids coalescence, and confer to the film an elastic character [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Formation Kinetics and Viscoelastic Properties of Water/Crude Oil Interfacial Films

Quintero

Noı̈k

Dalmazzone

et al. 2009

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Cinétique de formation et propriétés viscoélastiques du film interfacial eau/brut pétrolier -Les propriétés viscoélastiques du film interfacial huile/eau ont été étudiées sur un système pétrole brut de type paraffinique/eau salée afin d'en déterminer la cinétique de formation. Un tensiomètre à goutte pendante oscillante a été utilisé pour mesurer la tension interfaciale dynamique ainsi que les modules élastique (E') et visqueux (E") à différentes températures (20-60 °C) et à plusieurs fréquences (N). L'évolution de ces propriétés a été analysée et les mesures à 15 minutes indiquent que les modules et le déphasage vérifient les critères proposés par Winter et Chambon pour la formation d'une structure organisée à l'interface. L'effet de l'âge de l'interface est discuté sur les valeurs des modules d'élasticité ainsi que l'effet de la température sur les propriétés de surface et de tension interfaciale. Abstract -Formation Kinetics and Viscoelastic Properties of Water/Crude Oil Interfacial Films -Viscoelastic interfacial properties of a light paraffinic crude oil/water system were studied in order to determine the formation film kinetics. A drop oscillatory tensiometer was used for measuring the dynamical interfacial tension and elastic (E') / viscous (E") modulus at different temperatures (20-60°C) and different pulsation frequencies (N).

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A study of dynamic interfacial mechanisms for demulsification of water-in-oil emulsions

Cited by 119 publications

References 8 publications

Does Equilibrium Interfacial Tension Depend on Method of Measurement?

Does Equilibrium Interfacial Tension Depend on Method of Measurement?

Effect of the structure of commercial poly(ethylene oxide-b-propylene oxide) demulsifier bases on the demulsification of water-in-crude oil emulsions: elucidation of the demulsification mechanism

Formation Kinetics and Viscoelastic Properties of Water/Crude Oil Interfacial Films

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