Speeds of sound in ionic liquids under elevated pressures. New experimental data and CP-PC-SAFT modelling

Jeremiasz Pilarz; Joanna Feder-Kubis; Vyacheslav V. Melent'ev; Olga S. Ryshkova; Vadim I. Korotkovskii; Anton K. Radchenko; Eugene B. Postnikov; Mirosław Chorążewski; Ilya Polishuk

doi:10.1016/j.molliq.2020.112669

Speeds of sound in ionic liquids under elevated pressures. New experimental data and CP-PC-SAFT modelling

Jeremiasz Pilarz, Joanna Feder-Kubis, Vyacheslav V. Melent'ev, Olga S. Ryshkova, Vadim I. Korotkovskii, Anton K. Radchenko, Eugene B. Postnikov, Mirosław Chorążewski, Ilya Polishuk

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

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.

Original language	English
Article number	112669
Journal	Journal of Molecular Liquids
Volume	303
DOIs	https://doi.org/10.1016/j.molliq.2020.112669
State	Published - 1 Apr 2020

Keywords

CP-PC-SAFT
Ionic liquids
Predictive modelling
Speed of sound
Synthesis

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title = "Speeds of sound in ionic liquids under elevated pressures. New experimental data and CP-PC-SAFT modelling",

abstract = "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.",

keywords = "CP-PC-SAFT, Ionic liquids, Predictive modelling, Speed of sound, Synthesis",

author = "Jeremiasz Pilarz and Joanna Feder-Kubis and Melent'ev, {Vyacheslav V.} and Ryshkova, {Olga S.} and Korotkovskii, {Vadim I.} and Radchenko, {Anton K.} and Postnikov, {Eugene B.} and Miros{\l}aw Chor{\c a}{\.z}ewski and Ilya Polishuk",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = apr,

day = "1",

doi = "10.1016/j.molliq.2020.112669",

language = "אנגלית",

volume = "303",

journal = "Journal of Molecular Liquids",

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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

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

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VL - 303

JO - Journal of Molecular Liquids

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ER -

Speeds of sound in ionic liquids under elevated pressures. New experimental data and CP-PC-SAFT modelling

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