The solubility of NaHCO3 was determined in the NH4 +-Na+-CO3 2--HCO3 --Cl--H2O system with the concentration up to 6 mol*kg-1 by a dynamic method from 283.15 to 333.15 K. It was found that the solubility of NaHCO3 decreases with increasing concentration of Na2CO3, NH4HCO3, or NaCl. A speciation-based model was developed with MSE (mixed-solvent electrolyte) interaction parameters newly obtained by regressing both the experimental and literature solubility data. The average relative deviations are less than 5.0%. The new model is able to predict the solubility of NaHCO3 at pressure high up to 6.0 MPa for the NH3-CO2-NaCl-H2O system at 313.15 and 323.15 K. This work can provide theoretical basis for producing Na2CO3 with a better crystal form and higher productivity in the carbonation process.
Compounds
#
Formula
Name
1
CHNaO3
sodium bicarbonate
2
CNa2O3
sodium carbonate
3
CH5NO3
acid ammonium carbonate
4
ClNa
sodium chloride
5
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.