Viscoelastic Properties of Crude Oil Components at Oil‐Water Interfaces. 1. The Effect of Dilution

Hannisdal, Andreas; Orr, Robert; Sjöblom, Johan

doi:10.1080/01932690600992647

Cited by 56 publications

(62 citation statements)

References 35 publications

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“…The authors also noticed that G' increases when the solubility of asphaltenes in the bulk decreases. Dilatational rheology experiments using an oscillating pendant/sessile drop tensiometer by Bouriat et al 107 Sjöblom et al 108,109 and Yarranton et al 110,111 also showed that asphaltenes form an elastic structure at the liquid/oil interface. to form dimers in toluene solution, which does not match the aggregation behavior of asphaltenes.…”

Section: Adsorption At Liquid/liquid Interfacesmentioning

confidence: 99%

Model molecules mimicking asphaltenes

Sjöblom

Simon

2015

Advances in Colloid and Interface Science

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Section: Adsorption At Liquid/liquid Interfacesmentioning

confidence: 99%

Model molecules mimicking asphaltenes

Sjöblom

Simon

2015

Advances in Colloid and Interface Science

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166

132

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“…For example, asphaltenes can precipitate and deposit in the reservoirs, wells, pipes and other equipment 3,4,5 . They can also stabilize water-in-oil emulsions 6 (W/O) by forming a solid-like interface , or "skin" 7,8 , at the oil/water interface that hinders coalescence and retards film drainage 9,10,11 .…”

Section: Introductionmentioning

confidence: 99%

Sorption and Interfacial Rheology Study of Model Asphaltene Compounds

et al. 2016

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The sorption and rheological properties of an acidic polyaromatic compound (C5PeC11), which can be used to further our understanding in the behavior of asphaltenes, are determined experimentally. The results show that C5PeC11 exhibits the type of pH-dependent surface activity and interfacial shear rheology observed in C6-asphaltenes with a decrease in the interfacial tension concomitant to the elastic modulus when the pH increases. Surface pressure-area (Π-A) isotherms show evidence of aggregation behavior and π-π stacking at both the air/water and oil/water interfaces. Similarly, interactions between adsorbed C5PeC11 compounds are evidenced through desorption experiments at the oil/water interface. Contrary to indigenous asphaltenes, adsorption is reversible, but desorption is slower than for noninteracting species. The reversibility enables us to create layers reproducibly, whereas the presence of interactions between the compounds enables us to mimic the key aspects of interfacial activity in asphaltenes. Shear and dilatational rheology show that C5PeC11 forms a predominantly elastic film both at the liquid/air and the liquid/liquid interface. Furthermore, a soft glassy rheology model (SGR) fits the data obtained at the liquid/liquid interface. Yet, it is shown that the effective noise temperature determined from the SGR model for C5PeC11 is higher than for indigenous asphaltenes measured under similar conditions. Finally, from a colloidal and rheological standpoint, the results highlight the importance of adequately addressing the distinction between the material functions and true elasticity extracted from a shear measurement and the apparent elasticity measured in dilatational-pendant drop set-ups.

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“…Several techniques have been applied based on different experimental measurements: with a drop dilation/ compression oscillatory tensiometer [10][11][12][13][14][15][16]; with a flat interface by means of a Langmuir Balance [17,18]; or a sheared flat interface by means of a rotating/oscillatory interfacial device [3,19,20]. Most of the studied systems were model oils or solution of crude oil fractions (i.e.…”

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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Viscoelastic Properties of Crude Oil Components at Oil‐Water Interfaces. 1. The Effect of Dilution

Cited by 56 publications

References 35 publications

Model molecules mimicking asphaltenes

Model molecules mimicking asphaltenes

Sorption and Interfacial Rheology Study of Model Asphaltene Compounds

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

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