Experimental study of the density and viscosity of 1-ethyl-3-methylimidazolium ethyl sulfate

• Published in: The Journal of chemical thermodynamics Vol. 47; pp. 68 - 75
• Main Authors: Schmidt, H., Stephan, M., Safarov, J., Kul, I., Nocke, J., Abdulagatov, I.M., Hassel, E.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-04-2012
• Subjects: Confidence intervals; Densimeters; Density; Equation of state; Mathematical analysis; Methyl alcohol; Sulfates; Temperature dependence; Vibration tube densimeter; Viscometer; Viscosity; Viscosity; Vibration tube densimeter; Viscometer; Density; Equation of state
• ISSN: 0021-9614; 1096-3626
• DOI: 10.1016/j.jct.2011.09.027

► Density of the ionic liquid [EMIM][EtSO
4]. ► Viscosity of the ionic liquid [EMIM][EtSO
4]. ► Thermodynamic properties of ionic liquid [EMIM][EtSO
4]. ► Equation of state of ionic liquid [EMIM][EtSO
4].
Density and viscosity of 1-ethyl-3-methylimidazolium ethyl sulfate [EMIM][EtSO
4] have been measured over the temperature range from (283.15 to 413.15)
K and at pressures up to 140
MPa and in the temperature range from (283.15 to 373.15)
K at 0.1
MPa, respectively. The expanded uncertainty of the density, pressure, temperature, and viscosity measurements at the 95% confidence level with a coverage factor of
k
=
2 is estimated to be (0.01 to 0.08)%, 0.1%, 15
mK, and 0.35%, respectively. The measurements were carried out with an Anton–Paar DMA HPM vibration-tube densimeter and a fully automated SVM 3000 Anton–Paar rotational Stabinger viscometer. The vibration-tube densimeter was calibrated using various reference fluids, double-distilled water, methanol, toluene, and aqueous NaCl solutions. An empiric equation of state for [EMIM][EtSO
4] has been developed using the measured (
p,
ρ,
T) data. This equation was used to calculate the various thermodynamic properties of the IL and for compare with measured properties (speed of sound and enthalpy). Theoretically based Arrhenius–Andrade and Vogel–Tamman–Fulcher type equations were use to describe of the temperature dependence of measured viscosities for [EMIM][EtSO
4]. All measured properties were detailed compared with the reported data by other author.