Experimental viscosity B-coefficients of aqueous LiCl solutions

Abstract

A capillary flow technique was used to measure the viscosity of aqueous LiCl solutions from 0.0236 to 16.393 mol kg − 1 , 298.15 to 574.23 K, and 0.1 to 40 MPa. The uncertainties of viscosity, pressure, temperature, and composition measurements were estimated to be less than 1.5%, 0.001 to 0.01 MPa, 15 mK, and 0.02%, respectively. All experimental and derived results are compared with experimental values reported in the literature. The reliability and accuracy of the experimental method was confirmed with measurements on pure water with well known (IAPWS standards) viscosity values. The experimental and calculated values of viscosity for pure water from IAPWS formulation show excellent agreement (deviations, AAD, within 0.35%) in the temperature range from 296 to 580 K and at pressures up to 30 MPa. The experimental viscosity data have been interpreted in terms of the extended Jones–Dole equation for strong electrolyte solutions. The values of viscosity A-, B-, D-, and F-coefficients of the extended Jones–Dole equation for the relative viscosity ( η/ η 0) of aqueous LiCl solutions as a function of temperature are studied. The derived values of the viscosity A- and B-coefficients were compared with the results predicted by the Falkenhagen–Dole theory of electrolyte solutions and calculated with the ionic B-coefficient data.