The solubility of sulfur dioxide in aqueous solutions of sodium chloride and ammonium chloride in the temperature range from 313 K to 393 K at pressures up to 3.7 MPa: experimental results and comparison with correlations

The solubility of sulfur dioxide in aqueous solutions of single solutes sod ium chloride and ammonium chloride was measured using a static method at te mperatures from 313 K to 393 K and total pressures up to 3.7 MPa correspond ing to gas molalities of up to 10 mol/kg. Similarily to the system sulfur d ioxide-water, also in systems with sodium and ammonium chloride a second (s ulfur dioxide-rich) liquid phase is observed at high sulfur dioxide concent rations. A model to describe the phase equilibria is presented. Experimenta l results are reported and compared to correlations. (C) 1999 Elsevier Scie nce B.V. All rights reserved.