Thermophysical Properties of Five Acetate-Based Ionic Liquids
authors Almeida, HFD; Passos, H; Lopes-da-Silva, JA; Fernandes, AM; Freire, MG; Coutinho, JAP
nationality International
journal JOURNAL OF CHEMICAL AND ENGINEERING DATA
keywords ALKYL CHAIN-LENGTH; SURFACE TENSIONS; 1-BUTYL-3-METHYLIMIDAZOLIUM ACETATE; THERMODYNAMIC PROPERTIES; PHYSICOCHEMICAL PROPERTIES; TRANSPORT-PROPERTIES; SOLVENT PROPERTIES; TEMPERATURE; IMIDAZOLIUM; ANION
abstract Ionic liquids (ILs) with improved hydrogen-bonding acceptor abilities such as acetate-based compounds, have shown great potential for CO2 capture and biomass dissolution. In this context, the knowledge of the thermophysical properties of acetate-based fluids is essential for the design and scale-up of related processes. However, at this stage, acetate-based ILs are still poorly characterized. In this work, four thermophysical properties, specifically, density, viscosity, refractive index, and surface tension, were determined for five acetate-based ILs. Both protic and aprotic ILs were investigated, namely, N,N-dimethyl-N-ethylammonium acetate, 1-ethylimidazolium acetate, 1-ethyl-3-methylimidazolium acetate, 1-butyl-3-methylimidazolium acetate, and 1-butyl-1-methylpyrrolidinium acetate. From the temperature dependence of the measured properties, additional properties, such as the isobaric thermal expansion coefficient, the surface entropy and enthalpy, and the critical temperature, were further estimated.
publisher AMER CHEMICAL SOC
issn 0021-9568
year published 2012
volume 57
issue 11
beginning page 3005
ending page 3013
digital object identifier (doi) 10.1021/je300487n
web of science category Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical
subject category Thermodynamics; Chemistry; Engineering
unique article identifier WOS:000310768900015
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journal impact factor 2.196
5 year journal impact factor 2.331
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