Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Vapor Liquid Equilibria for the ZnSO4 H2SO4 H2O and MgSO4 H2SO4 H2O Systems at (30, 60, 90, and 101.3) kPa

Li, G.[Geng], Zhang, Y.[Yan], Asselin, E.[Edouard], Li, Z.[Zhibao]
J. Chem. Eng. Data 2014, 59, 11, 3449-3460
ABSTRACT
Vapor liquid equilibria (boiling points) data for the ZnSO4 H2SO4 H2O and the MgSO4 H2SO4 H2O systems were determined by the quasi-static ebulliometric method at (30, 60, 90, and 101.3) kPa. The boiling points of the ZnSO4 H2O and the ZnSO4 H2SO4 H2O systems were used to regress new chemical model parameters with the average absolute deviation of only 0.08 K. The model was verified by comparing its predictions of the solubility of zinc sulfate in water from (273.15 to 310.15) K and the activity of water in zinc sulfate solution at 298.15 K with literature data. Furthermore, the distributions of the ZnSO4(aq) (ZnSO4 neutral species), Zn2+, MgSO4(aq) (MgSO4 neutral species) and Mg2+ species were predicted. The ZnSO4-H2SO4-H2O system speciation provided a thermodynamic basis for the empirically optimized zinc sulfate concentrations currently employed in the Zn electrowinning industry.
Compounds
# Formula Name
1 O4SZn zinc sulfate
2 MgO4S magnesium sulfate
3 H2O4S sulfuric acid
4 H2O water
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 4
  • 1
  • Boiling temperature at pressure P, K ; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 40
  • POMD
  • 3
  • 4
  • 1
  • Boiling temperature at pressure P, K ; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 148
  • POMD
  • 2
  • 3
  • 4
  • Boiling temperature at pressure P, K ; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Molality, mol/kg - 2; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 68