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:
   Takenouchi, S.; Kennedy, G., Am. J. Sci. 1964, 262, 1055-74.

Variables:
   Temperature = 383.15 K to 598.15 K
   Pressure = 10 Mpa to 160 Mpa

Prepared By:
   Rosa Crovetto

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


t/°C	T/K	Temp Note	Henry's law constant, K [atm]	Henry Constant Note	Concentration C₁ [cm³/mol]
110	383.15	a	K = 5010, K = 5500	b	28.4
150	423.15	a	K = 5560, K = 6300	b	30.0
200	473.15	a	K = 4840, K = 6000	b	27.0
250	523.15	a	K = 4170, K = 5250	b	4.0
275	548.15	a	K = 4400	b	-
300	573.15	a	K = 3800	b	-
325	598.15	a	K = 2950	b	-

Notes:
   ^a  Calculated by the compiler.
   ^b  Henry's constants K_H,a and K_H,b were calculated by the authors from vapor-liquid equilibria data. K_H,a is obtained from K_H,b using the Krichevsky and Kasarnovsky equation¹ with the partial molar volume. Comparison with reliable partial molar volume data shows those volumes to be too low and unrealistic, especially at high temperatures. The authors state that the Henry's constants are valid to 250 °C (523.15 K).

Method/Apparatus/Procedure:
   The apparatus was a high-pressure autoclave with sampling valves for both phases. No stirring was used. Samples of the dense and the light phases were extracted and analyzed for their CO₂ content by titration.
The Henry's constants were obtained by graphical methods from the vapor-liquid equilibrium data.

Source and Purity of Materials:
   (1) Not stated.
   (2) Distilled. Degassed by boiling.

Estimated Errors:

   Temperature: δT/K = ± 1.5 or larger
   Pressure: δP/bar = ± 5 (by compiler)

References:
   1. Krichevsky, I.R.; Kasarnovsky, J.S., J. Am. Chem. Soc. 1935, 57, 2168-71.