High-pressure densities and derived thermodynamic properties 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 PHYSICOCHEMICAL PROPERTIES; PHYSICAL-PROPERTIES; TEMPERATURE; WATER; DEPENDENCE; VISCOSITY; MIXTURES; CHLORIDE; EQUATION; SOLVENTS
abstract This work addresses the experimental measurements of the pressure (0.10 < p/MPa < 10.0) and temperature (293.15 < T/K < 393.15) dependence of the density and derived thermodynamic properties, such as the isothermal compressibility, the isobaric expansivity, the thermal pressure coefficient, and the pressure dependence of the heat capacity of several imidazolium-based ionic liquids (ILs), namely, 1-butyl-3-methylimidazolium tetrafluoroborate, [bmim][BF4]; 3-methyl-1-octylimidazolium tetrafluoroborate, [omim][BF4]; 1-hexyl-3-methylimidazolium hexafluorophosphate, [hmim][PF6]; 3-methyl-1-octylimidazolium hexafluorophosphate, [omim][PF6]; 1-butyl-2,3-dimethylimidazolium hexafluorophosphate, [bmmim][PF6]; and 1-butyl-3-methylimidazolium trifluoromethansulfonate, [bmim][CF3SO3]. These ILs were chosen to provide an understanding of the influence of the cation alkyl chain length, the number of cation substitutions, and the anion influence on the properties under study. The influence of water content in the density was also studied for the most hydrophobic IL used, [omim][PF6]. A simple ideal-volume model was employed for the prediction of the imidazolium molar volumes at ambient conditions, which proved to agree well with the experimental results.
publisher AMER CHEMICAL SOC
issn 0021-9568
year published 2007
volume 52
issue 1
beginning page 80
ending page 88
digital object identifier (doi) 10.1021/je060247x
web of science category Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical
subject category Thermodynamics; Chemistry; Engineering
unique article identifier WOS:000243388900015
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.196
5 year journal impact factor 2.331
category normalized journal impact factor percentile 58.053
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg