Journal of Solution Chemistry

, Volume 35, Issue 5, pp 705–738

Experimental Study of the Effect of Temperature, Pressure and Concentration on the Viscosity of Aqueous NaBr Solutions

Article

DOI: 10.1007/s10953-006-9020-6

Cite this article as:
Abdulagatov, I.M. & Azizov, N.D. J Solution Chem (2006) 35: 705. doi:10.1007/s10953-006-9020-6

Abstract

The viscosity of 10 (0.049, 0.205, 0.464, 0.564, 0.820, 1.105, 1.496, 2.007, 2.382, and 2.961 mol ċ kg−1) binary aqueous NaBr solutions has been measured with a capillary-flow technique. Measurements were made at pressures up to 40 MPa. The range of temperature was 288–595 K. The total uncertainty of viscosity, pressure, temperature and composition measurements were estimated to be less than 1.6%, 0.05%, 15 mK, and 0.02%, respectively. The effect of temperature, pressure, and concentration on viscosity of binary aqueous NaBr solutions were studied. The measured values of the viscosity of NaBr(aq) were compared with data, predictions and correlations reported in the literature. The temperature and pressure coefficients of viscosity of NaBr(aq) were studied as a function of concentration and temperature. The viscosity data have been interpreted in terms of the extended Jones–Dole equation for the relative viscosity (η/η0) to calculate accurately the values of viscosity A- and B-coefficients as a function of temperature. 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. The physical meaning parameters V and E in the absolute rate theory of the viscosity and hydrodynamic molar volume Vk were calculated using the present experimental viscosity data. The TTG model has been used to compare predicted values of the viscosity of NaBr(aq) solutions with experimental values at high pressures.

Keywords

aqueous solutionB-coefficientcapillary viscometersodium bromideviscositywater

Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Institute for Geothermal Problems of the Dagestan Scientific Center of the Russian Academy of Sciences, MakhachkalaDagestanRussia
  2. 2.Physical and Chemical Properties DivisionNational Institute of Standards and TechnologyBoulderUSA
  3. 3.Azerbaijan State Oil AcademyBakuAzerbaijan