P rho T measurements of imidazolium-based ionic liquids
authors Gardas, RL; Freire, MG; Carvalho, PJ; Marrucho, IM; Fonseca, IMA; Ferreira, AGM; Coutinho, JAP
nationality International
journal JOURNAL OF CHEMICAL AND ENGINEERING DATA
keywords EXTENDED PRESSURE RANGE; PHASE-BEHAVIOR; PHYSICOCHEMICAL PROPERTIES; THERMODYNAMIC PROPERTIES; PHYSICAL-PROPERTIES; THERMOPHYSICAL PROPERTIES; 1-N-BUTYL-3-METHYLIMIDAZOLIUM HEXAFLUOROPHOSPHATE; CARBON-DIOXIDE; MOLTEN-SALTS; TEMPERATURE
abstract Experimental density measurements are reported, and the derived thermodynamic properties, such as the isothermal compressibility, the isobaric expansivity, and the thermal pressure coefficient are presented as Supporting Information for several imidazolium-based ionic liquids (ILs), namely, 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [C(2)mim][NTf2], 1-heptyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [C(7)mim][NTf2], 1-octyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [C(8)mim][NTf2], 1-ethyl-3-methylimidazolium tetrafluoroborate [C(2)mim][BF4], and 1-butyl-3-methyl-imidazolium tricyanomethane[C(4)mim][C(CN)(3)] in the pressure (0.10 < p/MPa < 30.00) and temperature (293.15 < T/K < 393.15) domains. These ILs were chosen to provide an understanding of the influence of the cation alkyl chain length and the anion influence on the properties under study. Experimental densities are correlated with the Tait equation with an average absolute deviation (AAD) less than 0.04 %. Experimental densities are in good agreement with the densities obtained by some recent predictive methods proposed in the literature.
publisher AMER CHEMICAL SOC
issn 0021-9568
year published 2007
volume 52
issue 5
beginning page 1881
ending page 1888
digital object identifier (doi) 10.1021/je700205n
web of science category Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical
subject category Thermodynamics; Chemistry; Engineering
unique article identifier WOS:000249501400060
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journal impact factor 2.196
5 year journal impact factor 2.331
category normalized journal impact factor percentile 58.053
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