Studies of bitumen-silica and oil-silica interactions in ionic liquids

Charles G. Hogshead, Evangelos Manias, Phillip Williams, Aron Lupinsky, Paul Painter

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Previous work in this laboratory has shown that bitumen and oil can be readily separated from sand, using ionic liquids at ambient temperatures. To probe the mechanism underlying the relative ease of separation, atomic force microscopy (AFM) has been used to study interaction forces and adhesion between bitumen surfaces and a silica probe in the presence of liquid media. The energy of adhesion between bitumen samples obtained from both Canadian and U.S. oil sands are approximately an order of magnitude smaller in an ionic liquid medium than in aqueous solution. This behavior was traced to the ability of ionic liquids to form layered charge structures on surfaces. Although interactions between the silica probe and an aged crude oil sample could not be determined, because the probe adhesion to the oil film exceeded the force capacity of the AFM, thermodynamic considerations indicate that the energy of separation of silica from aged oil is also significantly smaller in an ionic liquid medium than in aqueous solution.

Original languageEnglish (US)
Pages (from-to)293-299
Number of pages7
JournalEnergy and Fuels
Volume25
Issue number1
DOIs
StatePublished - Jan 20 2011

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asphalt
Ionic Liquids
Ionic liquids
Silicon Dioxide
Oils
Silica
Adhesion
Atomic force microscopy
Oil sands
Petroleum
Sand
Crude oil
Thermodynamics
Liquids

All Science Journal Classification (ASJC) codes

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

Cite this

Hogshead, Charles G. ; Manias, Evangelos ; Williams, Phillip ; Lupinsky, Aron ; Painter, Paul. / Studies of bitumen-silica and oil-silica interactions in ionic liquids. In: Energy and Fuels. 2011 ; Vol. 25, No. 1. pp. 293-299.
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Hogshead, CG, Manias, E, Williams, P, Lupinsky, A & Painter, P 2011, 'Studies of bitumen-silica and oil-silica interactions in ionic liquids', Energy and Fuels, vol. 25, no. 1, pp. 293-299. https://doi.org/10.1021/ef101404k

Studies of bitumen-silica and oil-silica interactions in ionic liquids. / Hogshead, Charles G.; Manias, Evangelos; Williams, Phillip; Lupinsky, Aron; Painter, Paul.

In: Energy and Fuels, Vol. 25, No. 1, 20.01.2011, p. 293-299.

Research output: Contribution to journalArticle

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