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Title: Phenomenological continuum theory of asphaltene-stabilized oil/water emulsions
Authors: Toth, Gyula I.
Selvag, Juri
Kvamme, Bjorn
Issue Date: 2017
Publisher: © American Chemical Society (ACS)
Citation: TOTH, G.I., SELVAG, J. and KVAMME, B., 2017. Phenomenological continuum theory of asphaltene-stabilized oil/water emulsions. Energy & Fuels, 31(2), pp. 1218-1225.
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. Based on 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 a convection-diffusion dynamics as a function of both the surface coverage and the viscosity contrast between the as- phaltene and the bulk liquids. We show, that, besides the traditional thermodynamic interpretation of emulsion formation, the timescale of drop coalescence can be con- trolled independently from the interfacial tension drop, which offers an alternative, solely kinetic driven mechanism of emulsion formation.
Description: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy & Fuels, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.energyfuels.6b02430.
Sponsor: This work has been supported by the VISTA basic research programme project No. 6359 "Surfactants for water/CO2/hydrocarbon emulsions for combined CO2 storage and utilization" of the Norwegian Academy of Science and Letters and the Statoil.
Version: Accepted for publication
DOI: 10.1021/acs.energyfuels.6b02430
URI: https://dspace.lboro.ac.uk/2134/27270
Publisher Link: https://doi.org/10.1021/acs.energyfuels.6b02430
ISSN: 0887-0624
Appears in Collections:Published Articles (Maths)

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