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 sodium chloride and ammonium chloride was measured using a static method at temperatures from 313 K to 393 K and total pressures up to 3.7 MPa corresponding to gas molalities of up to 10 mol/kg. Similarily to the system sulfur dioxide–water, also in systems with sodium and ammonium chloride a second (sulfur dioxide-rich) liquid phase is observed at high sulfur dioxide concentrations. A model to describe the phase equilibria is presented. Experimental results are reported and compared to correlations.