IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Water

Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Zawisza, A.; Malesinska, B., J. Chem. Eng. Data 1981, 26, 388-91.

Variables:
   Temperature = 323.15 K to 473.15 K
   Pressure = 0.154 MPa to 5.389 Mpa
   Concentration = x₂ = 0.9924 0.9995

Prepared By:
   Rosa Crovetto

Experimental Remarks:

   The authors calculated Henry's constants from the data using the virial equation of state. Various corrections were applied. The values of Henry's constants are different temperatures, given as they are in the original source, are listed in the following table:

T/K          323.15                348.15                373.15                398.15                423.15                448.15                473.15
H_p/MPa    303.4                  449.6                  525.6                  588.9                  632.8                  631.8                  593.7

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


T/K	Pressure [bar]	Mole Fraction (x₁)	x₁ Note
323.15	2.54	0.0005	a
323.15	4.88	0.0016	a
323.15	7.62	0.0025	a
323.15	8.92	0.0030	a
323.15	14.41	0.0046	a
323.15	25.05	0.0076	a
348.15	2.37	0.0005	a
348.15	21.00	0.0046	a
348.15	35.91	0.0076	a
373.15	3.56	0.0005	a
373.15	27.10	0.0046	a
373.15	45.60	0.0076	a
398.15	5.27	0.0005	a
398.15	11.45	0.0016	a
398.15	17.73	0.0025	a
398.15	21.38	0.0030	a
398.15	32.35	0.0046	a
398.15	53.89	0.0076	a
423.15	7.69	0.0005	a
423.15	15.56	0.0016	a
423.15	21.24	0.0025	a
423.15	24.99	0.0030	a
423.15	36.09	0.0046	a
448.15	11.97	0.0005	a
448.15	19.77	0.0016	a
448.15	25.96	0.0025	a
448.15	30.37	0.0030	a
448.15	40.80	0.0046	a
473.15	18.44	0.0005	a
473.15	25.39	0.0016	a
473.15	31.75	0.0025	a
473.15	35.85	0.0030	a
473.15	46.16	0.0046	a

Notes:
   ^a  Calculated by the compiler.
   ^b  Bubble point pressure.

Method/Apparatus/Procedure:
   A static method was used to determine the dew and boiling points of CO₂/H₂O mixtures at several pressures and temperatures¹. The apparatus and the method were checked by measuring the vapor pressure of pure water.
Also given are gas phase compositions, dew points, and molar volume of the gas phase over all the concentration range of both components.

Source and Purity of Materials:
   (1) Prepared from Na₂CO₃ treated with 10% aqueous H₂SO₄. Dried over P₂O₅.
   (2) Distilled twice.

Estimated Errors:
   Solubility: δP = ± 0.03 % (by authors)
   Temperature: δT/K = ± 0.005 (by authors)

References:
   1. Aftienjew, J.; Zawisza, A., J. Chem. Thermodyn. 1977, 9, 153.