IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Sodium chloride and Water

Components:
   (1) Sodium chloride; NaCl; [7647-14-5]  NIST Chemistry WebBook for detail
   (2) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Rumpf, B.; Nicolaisen, H.; öcal, C.; Maurer, G., J. Solution Chem. 1994, 23, 431-48.

Variables:
   Temperature = 313.14 K to 433.12 K
   Pressure = 0.151 MPa to 9.328 Mpa
   Concentration = m₂/mol kg^-1 = 0, near 4.0 and 6.0

Prepared By:
   H.L. Clever

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

Solubility of carbon dioxide in aqueous sodium chloride
T/K	Pressure [MPa]	Molality m₁ [mol/kg]	m₁ Note	Molality m₂ [mol/kg]	m₂ Note
323.17	1.059	0.196	b	0.0	a
323.16	1.247	0.230	b	0.0	a
323.17	1.432	0.259	b	0.0	a
323.17	1.660	0.299	b	0.0	a
323.17	1.809	0.323	b	0.0	a
323.17	3.480	0.581	b	0.0	a
323.18	5.798	0.871	b	0.0	a
313.16	0.467	0.0497	b	3.997	a
313.14	0.911	0.0995	b	3.997	a
313.14	1.900	0.1996	b	3.997	a
313.19	3.147	0.3098	b	3.997	a
313.19	5.123	0.4529	b	3.997	a
313.19	6.917	0.5497	b	3.997	a
333.13	0.625	0.0509	b	3.997	a
333.16	1.141	0.0909	b	3.997	a
333.16	1.328	0.1073	b	3.997	a
333.15	2.514	0.1922	b	3.997	a
333.16	2.871	0.2184	b	3.997	a
333.14	3.521	0.2570	b	3.997	a
333.17	4.737	0.3305	b	3.997	a
333.15	7.303	0.4472	b	3.997	a
333.16	9.642	0.5272	b	3.997	a
353.12	0.817	0.0505	b	4.001	a
353.12	1.642	0.1014	b	4.001	a
353.10	3.387	0.2032	b	4.001	a
353.10	5.592	0.3084	b	4.001	a
353.12	6.940	0.3594	b	4.001	a
353.11	8.337	0.4116	b	4.001	a
353.11	9.637	0.4613	b	4.001	a
393.06	0.169	0.0000	b	4.003	a
393.07	1.204	0.0518	b	4.001	a
393.19	2.331	0.1035	b	4.003	a
393.10	4.742	0.2084	b	4.001	a
393.19	7.650	0.3135	b	4.003	a
393.12	9.328	0.3657	b	4.003	a
413.06	0.301	0.0000	b	4.003	a
413.07	1.393	0.0505	b	4.003	a
413.08	2.550	0.1011	b	4.003	a
413.09	5.042	0.2027	b	4.003	a
413.07	8.671	0.3272	b	4.003	a
432.97	0.515	0.0000	b	4.003	a
432.86	1.662	0.506	b	4.003	a
432.96	2.858	0.1013	b	4.003	a
432.95	5.912	0.2188	b	4.003	a
432.98	9.048	0.3254	b	4.003	a
313.31	0.602	0.0517	b	5.999	a
313.22	1.232	0.1035	b	5.999	a
313.28	2.640	0.2074	b	5.999	a
313.27	4.430	0.3133	b	5.999	a
313.31	6.799	0.4177	b	5.999	a
313.19	8.427	0.4693	b	5.999	a
333.12	0.820	0.0526	b	5.999	a
333.12	1.678	0.1047	b	5.999	a
333.10	3.657	0.2106	b	5.999	a
333.00	6.844	0.3388	b	5.999	a
333.05	8.670	0.3965	b	5.999	a
353.12	0.997	0.509	b	5.999	a
353.11	2.032	0.1021	b	5.999	a
353.08	4.394	0.2043	b	5.999	a
353.10	7.610	0.3085	b	5.999	a
353.08	9.044	0.3553	b	5.999	a
393.09	0.151	0.0000	b	5.999	a
393.17	1.421	0.0518	b	5.999	a
393.14	2.778	0.1031	b	5.999	a
393.13	5.937	0.2067	b	5.999	a
393.12	9.135	0.3049	b	5.999	a
413.10	0.275	0.0000	b	5.999	a
413.09	1.661	0.511	b	5.999	a
413.09	3.195	0.1024	b	5.999	a
413.09	6.291	0.2051	b	5.999	a
413.12	9.201	0.2878	b	5.999	a
433.12	0.471	0.0000	b	5.999	a
433.07	1.898	0.512	b	5.999	a
433.05	3.406	0.1025	b	5.999	a
433.08	6.578	0.2052	b	5.999	a
433.05	8.981	0.2743	b	5.999	a

Method/Apparatus/Procedure:
   The apparatus is a modification of one used in earlier work (1). It consists of a 30 mL high pressure optical cell, thermostat, magnetic stirrer, thermocouples and Pt resistance thermometer, pressure transducers and tanks for aqueous solutions, rinse water and solute gas. Measured amounts of gas and solvent are added to the cell, extra solvent is added until the gas phase disappears. The pressure is reduced by removing stepwise small known amounts of solvent until a small stable bubble appears. The solubility is calculated from the known amounts of solvent and carbon dioxide in the cell.

Source and Purity of Materials:
   (1) Carbon dioxide. Messer Griesheim, Ludwigshafen, >99.995 mol %, used as received.
   (2) Sodium chloride. Merck GmbH, Darmstadt. > 99.9 mass %. Degassed and dried under vacuum.
   (3) Water. Deionized and degassed by vacuum distillation.

Estimated Errors:
   Solubility: δm₂/m₂ = ± 0.003;
δm₁/m₁ = ± 0.01 to 0.03
   Temperature: δT/K = ± 0.1
   Pressure: δp/p < ± 0.03 below 6 MPa
δp/p < ± 0.05 at higher pressure

References:
   1. Rumpf B.; Maurer, G., Ber. Bunsenges. Phys. Chem. 1993, 97, 85.