TY - JOUR
T1 - Measurement and Correlation of High-Pressure Densities and Atmospheric Viscosities of Ionic Liquids
T2 - 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide), 1-Allyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide, 1-Ethyl-3-methylimidazolium Tetracyanoborate, and 1-Hexyl-3-methylimidazolium Tetracyanoborate
AU - Hiraga, Yuya
AU - Hagiwara, Saki
AU - Sato, Yoshiyuki
AU - Smith, Richard L.
N1 - Funding Information:
*Tel.: +81-22-795-5863; Fax.: +81-22-795-5863; E-mail: smith@scf.che.tohoku.ac.jp. ORCID Richard L. Smith Jr.: 0000-0002-9174-7681 Funding This work was supported by JSPS KAKENHI (Japan), Grant-in-Aid for Scientific Research (B) Number 16H04549. Notes The authors declare no competing financial interest.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/4/12
Y1 - 2018/4/12
N2 - Four ionic liquids, [bmpyr][Tf2N] (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide), [amim][Tf2N] (1-allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), [emim][TCB] (1-ethyl-3-methylimidazolium tetracyanoborate), and [hmim][TCB] (1-hexyl-3-methylimidazolium tetracyanoborate), were studied. High-pressure densities were measured at pressures up to 200 MPa and at temperatures of 312-433 K. Densities and viscosities at atmospheric pressure were measured over a temperature range of 293 to 373 K, and average relative deviation (ARD) of correlation with Vogel-Fulcher-Tammann equation for viscosity were within 0.08%. Correlation of the density data with the Tait equation could be obtained to within 0.02% ARD. Isobaric expansivities calculated from the Tait equation were constant or decreased slightly with increasing temperature in accordance with trends commonly reported for ionic liquids. Parameters for the ϵ∗-modified Sanchez-Lacombe equation of state are tabulated that allow correlation of the ionic-liquid high-pressure densities to within an ARD of less than 0.08%.
AB - Four ionic liquids, [bmpyr][Tf2N] (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide), [amim][Tf2N] (1-allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), [emim][TCB] (1-ethyl-3-methylimidazolium tetracyanoborate), and [hmim][TCB] (1-hexyl-3-methylimidazolium tetracyanoborate), were studied. High-pressure densities were measured at pressures up to 200 MPa and at temperatures of 312-433 K. Densities and viscosities at atmospheric pressure were measured over a temperature range of 293 to 373 K, and average relative deviation (ARD) of correlation with Vogel-Fulcher-Tammann equation for viscosity were within 0.08%. Correlation of the density data with the Tait equation could be obtained to within 0.02% ARD. Isobaric expansivities calculated from the Tait equation were constant or decreased slightly with increasing temperature in accordance with trends commonly reported for ionic liquids. Parameters for the ϵ∗-modified Sanchez-Lacombe equation of state are tabulated that allow correlation of the ionic-liquid high-pressure densities to within an ARD of less than 0.08%.
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U2 - 10.1021/acs.jced.7b00773
DO - 10.1021/acs.jced.7b00773
M3 - Article
AN - SCOPUS:85045461005
VL - 63
SP - 972
EP - 980
JO - Journal of Chemical & Engineering Data
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
IS - 4
ER -