Frontiers of Chemical Engineering in China

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Frontiers of Chemical Engineering in China, 2009, 3(1): 12-19
DOI 10.1007/s11705-009-0151-3
Measurement and correlation of supercritical CO2 and ionic liquid systems for design of advanced unit operations
Hiroshi Machida et al
Department of Chemical Engineering, Research Center of Supercritical Fluid Technology, Tohoku University, Sendai, Japan

"Ionic liquids combined with supercritical fluid technology hold great promise as working solvents for developing compact processes. Ionic liquids, which are organic molten salts, typically have extremely low volatility and high functionality, but possess high viscosities, surface tensions and low diffusion coefficients, which can limit their applicability. CO2, on the other hand, expecially in its supercritical state, is a green solvent that can be used advantageously when combined with the ionic liquid to provide viscosity and surface tension reduction and to promote mass transfer.

"In this work we examine a subset of of available high pressure pure component ionic liquid PVT data and high pressure CO2-ionic liquid solubility data and report new correlations for CO2-ionic liquid systems with equations of state that have some industrial applications including:
(1) general
(2) fuel desulfurization
(3) CO2 capture
(4) chiral separation"

source: http://www.springerlink.com/content/1p47j5q8744u5384/

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