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:
   Stewart, P.B.; Munjal, P., J. Chem. Eng. Data 1970, 15, 67-71.

Variables:
   Temperature = 273.15 K to 298.15 K
   Pressure = 1.013 MPa to 4.560 Mpa

Prepared By:
   C.L. Young

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

A. Synthetic sea water^a
T/K	Pressure [bar]	Mole Fraction (x₁)	10² * Solubility	Solubility Note
273.15	10.13	1.267	3.133	a
273.15	25.33	2.394	5.988	a
273.15	30.40	2.637	6.614	a
278.15	10.13	1.055	2.603	a
278.15	20.26	1.806	4.492	a
278.15	38.50	2.532	6.342	a
283.15	10.13	0.8535	2.102	a
283.15	20.26	1.533	2.801	a
283.15	38.50	2.185	5.455	a
285.15	45.60	2.204	5.503	a
298.15	20.26	1.026	2.403	a
298.15	45.60	1.655	4.110	a

Notes:
   ^a  m₁/m₂ = solubility of carbon dioxide; m₁ = mass of CO₂; m₂ = mass of H₂O

Method/Apparatus/Procedure:
   Rocking equilibrium cell fitted with Bourdon-type pressure gauges. Carbon dioxide gas admitted to cell containing water. After equilibrium established samples of liquid withdrawn and analyzed by stripping out carbon dioxide, absorbing in excess barium hydroxide and back-titrating.

Source and Purity of Materials:
   (1) Matheson research grade, purity 99.99 mole %.
   (2) Degassed and distilled.

Estimated Errors:
   Solubility: δx₁/x₁ = ± 1 %
   Temperature: δT/K = ± 0.06
   Pressure: δP/kPa = ± 2 below 3.6 MPa, ± 3.4 above 3.6 Mpa