Thermodynamics Research Center / ThermoML | International Journal of Thermophysics

Thermal Conductivity and Viscosity of Aqueous K2SO4 Solutions at Temperatures from 298 to 575K and at Pressures up to 30MPa

Abdulagatov, I. M.[Ilmutdin M.], Azizov, N. D.[Nazim D.]
Int. J. Thermophys. 2005, 26, 3, 593-635
ABSTRACT
The thermal conductivity of three (0.239, 0.499, and 0.782 mol*kg.1) and the viscosity of four (0.0658, 0.2055, 0.3050, and 0.4070 mol*kg.1) binary aqueous K2SO4 solutions have been measured with coaxial-cylinder (steady-state) and capillary-flow techniques, respectively. Measurements were made at pressures up to 30MPa, and the range of temperature was 298 575 K. The total uncertainties of the thermal conductivity, viscosity, pressure, temperature, and composition measurements were estimated to be less than 2%, 1.6%, 0.05%, 30 mK, and 0.02%, respectively. The measured values of the thermal conductivity and viscosity of K2SO4 (aq) were compared with data and correlations reported in the literature. The reliability and accuracy of the experimental method was confirmed with measurements on pure water with well known (IAPWS standards) thermal conductivity and viscosity values (deviations, AAD, within 0.31 % and 0.52 %, respectively). The values of the viscosity A-, B-, and D-coefficients of the extended Jones Dole equation for the relative viscosity (c/c0) of aqueous K2SO4 solutions as a function of temperature were studied. The maximum of the Bcoefficient near 340K has been found. The derived values of the viscosity A- and B-coefficients were compared with results predicted by the Falkenhagen Dole theory of electrolyte solutions and calculated with the ionic B-coefficient data. The behavior of the concentration dependence of the relative viscosity of aqueous K2SO4 solutions is discussed in terms of the modern theory of transport phenomena in electrolyte solutions.
Compounds
# Formula Name
1 K2O4S potassium sulfate
2 H2O water
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 2
  • Thermal conductivity, W/m/K ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Coaxial cylinder method
  • 31
  • POMD
  • 2
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Capillary tube (Ostwald; Ubbelohde) method
  • 28
  • POMD
  • 2
  • 1
  • Thermal conductivity, W/m/K ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • Coaxial cylinder method
  • 90
  • POMD
  • 2
  • 1
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • Capillary tube (Ostwald; Ubbelohde) method
  • 172