TY - JOUR
T1 - Measurement and correlation of infinite dilution partition coefficients of aromatic compounds in the ionic liquid 1-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6])-CO2 system at temperatures from 313 to 353 K and at pressures up to 16 MPa
AU - Machida, Hiroshi
AU - Sato, Yoshiyuki
AU - Smith, Richard L.
PY - 2008/1/1
Y1 - 2008/1/1
N2 - Infinite dilution partition coefficients of benzene, toluene, chlorobenzene and naphthalene in the ionic liquid, 1-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6])-CO2 system were measured with a chromatographic technique. Partition coefficients for each solute increased with increasing pressure and had the trend of Kbenzene∞ > Ktoluene∞ > Kchlorobenzene∞ > Knaphthalene∞ at a given temperature. At pressures above 12 MPa, Knaphthalene∞ became one order in magnitude smaller than that of the other components, which is attributed to the π-π interactions between naphthalene and the imidazolium group of the ionic liquid. The Sanchez-Lacombe equation of state was found to provide adequate correlation of the data and their temperature and pressure trends.
AB - Infinite dilution partition coefficients of benzene, toluene, chlorobenzene and naphthalene in the ionic liquid, 1-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6])-CO2 system were measured with a chromatographic technique. Partition coefficients for each solute increased with increasing pressure and had the trend of Kbenzene∞ > Ktoluene∞ > Kchlorobenzene∞ > Knaphthalene∞ at a given temperature. At pressures above 12 MPa, Knaphthalene∞ became one order in magnitude smaller than that of the other components, which is attributed to the π-π interactions between naphthalene and the imidazolium group of the ionic liquid. The Sanchez-Lacombe equation of state was found to provide adequate correlation of the data and their temperature and pressure trends.
KW - Ionic liquid
KW - Partition coefficient
KW - Sanchez-Lacombe equation of state
KW - Supercritical CO
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U2 - 10.1016/j.supflu.2007.08.005
DO - 10.1016/j.supflu.2007.08.005
M3 - Article
AN - SCOPUS:35348819848
VL - 43
SP - 430
EP - 437
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
SN - 0896-8446
IS - 3
ER -