TY - JOUR
T1 - Speeds of sound in ionic liquids under elevated pressures. New experimental data and CP-PC-SAFT modelling
AU - Pilarz, Jeremiasz
AU - Feder-Kubis, Joanna
AU - Melent'ev, Vyacheslav V.
AU - Ryshkova, Olga S.
AU - Korotkovskii, Vadim I.
AU - Radchenko, Anton K.
AU - Postnikov, Eugene B.
AU - Chorążewski, Mirosław
AU - Polishuk, Ilya
N1 - Publisher Copyright:
© 2020
PY - 2020/4/1
Y1 - 2020/4/1
N2 - This study reports synthesis of a new ionic liquid ethyl-1-octyloxymethylimidazolium bis(trifluoromethylsulfonyl)imide ([C2imC1OC8][NTf2]) and its speed of sound data at 295.15 K ≤ T ≤ 373.15 K and 1 bar ≤ P ≤ 1471.5 bar. In addition, the atmospheric pressure densities of this IL were measured at 292.05 K ≤ T ≤ 423.65 K and determined at 295.15 K ≤ T ≤ 373.15 K and 1 bar ≤ P ≤ 1500 bar. Basing on a representative variety of ILs, it is demonstrated that the CP-PC-SAFT EOS adjusted to their high-pressure density data by a standardized numerical procedure and attached by a simple expression for estimating the ideal gas heat capacities is capable to predict sound velocities in a particularly accurate manner, with AAD around 1% and at times even smaller that the experimental uncertainties.
AB - This study reports synthesis of a new ionic liquid ethyl-1-octyloxymethylimidazolium bis(trifluoromethylsulfonyl)imide ([C2imC1OC8][NTf2]) and its speed of sound data at 295.15 K ≤ T ≤ 373.15 K and 1 bar ≤ P ≤ 1471.5 bar. In addition, the atmospheric pressure densities of this IL were measured at 292.05 K ≤ T ≤ 423.65 K and determined at 295.15 K ≤ T ≤ 373.15 K and 1 bar ≤ P ≤ 1500 bar. Basing on a representative variety of ILs, it is demonstrated that the CP-PC-SAFT EOS adjusted to their high-pressure density data by a standardized numerical procedure and attached by a simple expression for estimating the ideal gas heat capacities is capable to predict sound velocities in a particularly accurate manner, with AAD around 1% and at times even smaller that the experimental uncertainties.
KW - CP-PC-SAFT
KW - Ionic liquids
KW - Predictive modelling
KW - Speed of sound
KW - Synthesis
UR - https://www.scopus.com/pages/publications/85079557411
U2 - 10.1016/j.molliq.2020.112669
DO - 10.1016/j.molliq.2020.112669
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AN - SCOPUS:85079557411
SN - 0167-7322
VL - 303
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 112669
ER -