Volume Expansion of Ionic Liquids in the Presence of Supercritical Carbon Dioxide 


Vol. 14,  No. 4, pp. 248-255, Dec.  2008


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  Abstract

The volume expansion of three ionic liquids (ILs) in the presence of supercritical carbon dioxide has been measured at pressures up to 32 MPa and at temperatures from 313.15 to 333.15 K in a high-pressure view cell. The imidazolium-derivative ionic liquids 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), and 1-octyl-3-methylimidazolium tetrafluoroborate ([omim][BF4]) were employed in this research. The effects of pressure, temperature, nature of anion and cation as well as the water content on the volume expansion of ILs by absorbing CO2 were investigated experimentally. The volume expansion was higher for the ILs with longer cationic alkyl group and for the ILs with lower anion polarity. The lower the water content, the lower the temperature, or the higher the pressure, the higher was the expansion of IL phase.

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  Cite this article

[IEEE Style]

L. BH and S. JJ, "Volume Expansion of Ionic Liquids in the Presence of Supercritical Carbon Dioxide," Clean Technology, vol. 14, no. 4, pp. 248-255, 2008. DOI: .

[ACM Style]

Lim BH and Shim JJ. 2008. Volume Expansion of Ionic Liquids in the Presence of Supercritical Carbon Dioxide. Clean Technology, 14, 4, (2008), 248-255. DOI: .

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

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