Solubility of Sulfur Dioxide in Aqueous Solutions of Acetic Acid, Sodium Acetate, and Ammonium Acetate in the Temperature Range from 313 to 393 K at Pressures up to 3.3 MPa: Experimental Results and Comparison with Correlations/Predictions

Abstract

New experimental results for the solubility of sulfur dioxide in aqueous solutions of single solutes acetic acid, sodium acetate and ammonium acetate at temperatures from 313 to 393 K and total pressures up to 3.3 MPa are reported. Similar to the system sulfur dioxide−water, also in such systems with acetic acid and sodium or ammonium acetate a second (sulfur dioxide rich) liquid phase is observed at high sulfur dioxide concentrations. A model to describe the phase equilibrium is presented and calculated (i.e., predicted as well as correlated) phase equilibria are compared to the new experimental data.