Scientific Reports (Jul 2017)

A Fluctuation Equation of State for Prediction of High-Pressure Densities of Ionic Liquids

  • Mirosław Chorążewski,
  • Eugene B. Postnikov,
  • Bernadeta Jasiok,
  • Yuriy V. Nedyalkov,
  • Johan Jacquemin

DOI
https://doi.org/10.1038/s41598-017-06225-9
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 9

Abstract

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Abstract During this work, we demonstrate, for the first time, that the volumetric properties of pure ionic liquids could be truly predicted as a function of temperature from 219 K to 473 K and pressure up to 300 MPa. This has been achieved by using only density and isothermal compressibility data at atmospheric pressure through the Fluctuation Theory-based Tait-like Equation of State (FT-EoS). The experimental density data of 80 different ionic liquids, described in the literature by several research groups as a function of temperature and pressure, was then used to provide comparisons. Excellent predictive capability of FT-EoS was observed with an overall relative absolute average deviation close to 0.14% for the 15,298 data points examined during this work.