Estimation of speed of sound of ionic liquids using surface tensions and densities: A volume based approach

Ramesh Gardas, J.A.P. Coutinho

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

The limited availability of experimental data and their quality have been preventing the development of predictive methods and Computer Aided Molecular Design (CAMD) of ionic liquids (ILs). Based on experimental speed of sound data collected from the literature, the inter-relationship of surface tension (s), density (?), and speed of sound (u) has been examined for imidazolium based ILs containing hexafluorophosphate (PF6), tetrafluoroborate (BF4), bis(trifluoromethanesulphonyl) amide (NTf2), methyl sulphate (MeSO4), ethyl sulphate (EtSO4), and trifluoromethanesulphonate (CF3SO3) anions, covering wide ranges of temperature, 278.15–343.15 K and speed of sound, 1129.0–1851.0 m s-1. The speed of sound was correlated with a modified Auerbach's relation, by using surface tension and density data obtained from volume based predictive methods previously proposed by the authors. It is shown that a good agreement with literature data is obtained. For 133 data points of 14 ILs studied a mean percent deviation (MPD) of 1.96% with a maximum deviation inferior to 5% was observed. The correlations developed here can thus be used to evaluate the speeds of sound of new ionic liquids.
Original languageEnglish
Pages (from-to)188-192
Number of pages5
JournalFluid Phase Equilibria
Volume267 (2)
Issue number2
DOIs
Publication statusPublished - 25 May 2008

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Ionic Liquids
liquid surfaces
Acoustic wave velocity
Ionic liquids
Surface tension
interfacial tension
acoustics
liquids
sulfates
deviation
Amides
amides
Anions
availability
coverings
Negative ions
Availability
anions

Cite this

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Estimation of speed of sound of ionic liquids using surface tensions and densities: A volume based approach. / Gardas, Ramesh; Coutinho, J.A.P.

In: Fluid Phase Equilibria, Vol. 267 (2), No. 2, 25.05.2008, p. 188-192.

Research output: Contribution to journalArticle

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