Solubility of hydrogen sulfide in aqueous solutions of single strong electrolytes sodium nitrate, ammonium nitrate, and sodium hydroxide at temperatures from 313 to 393 K and total pressures up to 10 MPa

New experimental results for the solubility of hydrogen sulfide in aqueous solutions of the single strong electrolytes sodium nitrate, ammonium nitrat e, and sodium hydroxide at temperatures from 313 to 393 K and total pressur es up to 10 MPa are reported. As in the strong electrolyte-free system, a s econd - hydrogen sulfide-rich - liquid phase is observed at high hydrogen s ulfide concentrations. A thermodynamic model for describing the phase equil ibrium is presented. Calculations are compared with the new experimental da ta. (C) 2000 Elsevier Science B.V. All rights reserved.