Phenomenological Continuum Theory of Asphaltene-Stabilized Oil/Water Emulsions

G. Tóth, Juri Selvåg, Bjørn Kvamme

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In this paper, we use a phenomenological continuum theory of the Ginzburg-Landau type to address emulsion formation in water/light hydrocarbon/asphaltene systems. On the basis of the results of recent molecular dynamics simulations, we first calibrate the model parameters and show that the theory produces a reasonable equation of state. Next, the coalescence of oil droplets is studied by convection-diffusion dynamics as a function of both the surface coverage and the viscosity contrast between the asphaltene and the bulk liquids. We show that, besides the traditional thermodynamic interpretation of emulsion formation, the time scale of drop coalescence can be controlled independently from the interfacial tension drop, which offers an alternative, solely kinetic driven mechanism of emulsion formation.

Original languageEnglish
Pages (from-to)1218-1225
Number of pages8
JournalEnergy and Fuels
Volume31
Issue number2
DOIs
Publication statusPublished - Feb 16 2017

Fingerprint

Emulsions
Oils
Coalescence
Water
Hydrocarbons
Equations of state
Surface tension
Molecular dynamics
Thermodynamics
Viscosity
Kinetics
Computer simulation
Liquids
asphaltene

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Phenomenological Continuum Theory of Asphaltene-Stabilized Oil/Water Emulsions. / Tóth, G.; Selvåg, Juri; Kvamme, Bjørn.

In: Energy and Fuels, Vol. 31, No. 2, 16.02.2017, p. 1218-1225.

Research output: Contribution to journalArticle

Tóth, G. ; Selvåg, Juri ; Kvamme, Bjørn. / Phenomenological Continuum Theory of Asphaltene-Stabilized Oil/Water Emulsions. In: Energy and Fuels. 2017 ; Vol. 31, No. 2. pp. 1218-1225.
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