The solubility of carbon dioxide in aqueous solutions of piperazine was determined at low gas loadings (stoichiometric molar ratios of carbon dioxide to piperazine between about 0.05 and 0.95) and temperatures between (313 and 393) K by means of headspace gas chromatography. The stoichiometric molality of piperazine amounted to about (1 and 2) mol*(kg of water)-1 {mass fraction of piperazine (8 and 15) %} at T 313 K and to about (2 and 4) mol*(kg of water)-1 {mass fraction of piperazine (15 and 26) % } at T (353 and 393) K. The partial pressure of carbon dioxide was between about (0.1 and 95) kPa. A thermodynamic model for describing the vapor-liquid equilibrium (which applies Pitzer's molality scale based equation for describing the Gibbs excess energy of the aqueous phase) is revised and extended using the new data.
Compounds
#
Formula
Name
1
C4H10N2
piperazine
2
CO2
carbon dioxide
3
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.