IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Carbon dioxide with Sodium chloride and Water

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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:
   Takenouchi, S.; Kennedy, G., Am. J. Sci. 1965, 263, 445-54.

Variables:
   Temperature = 423.15 K to 723.15 K
   Pressure = 100 bar to 1400 bar
   Concentration = 10²w₂ = 0, 6, and 20

Prepared By:
   Pirketta Scharlin

Experimental Remarks:

   In the VARIABLES box, w₂ = mass fraction of NaCl.

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

t/°C	T/K	Temp Note	Chemical Name	Pressure [bar]	Keunen coefficient, S	S Note
150	423.15	b	pure H2O	100	3.1	a
150	423.15	b	pure H2O	200	5.1	a
150	423.15	b	pure H2O	300	6.1	a
150	423.15	b	pure H2O	400	6.9	a
150	423.15	b	pure H2O	500	7.5	a
150	423.15	b	pure H2O	600	8.0	a
150	423.15	b	pure H2O	800	9.0	a
150	423.15	b	pure H2O	1000	9.7	a
150	423.15	b	pure H2O	1200	10.3	a
150	423.15	b	pure H2O	1400	10.8	a
200	473.15	b	pure H2O	100	3.2	a
200	473.15	b	pure H2O	200	6.1	a
200	473.15	b	pure H2O	300	7.9	a
200	473.15	b	pure H2O	400	9.5	a
200	473.15	b	pure H2O	500	10.8	a
200	473.15	b	pure H2O	600	11.8	a
200	473.15	b	pure H2O	800	13.2	a
200	473.15	b	pure H2O	1000	14.2	a
200	473.15	b	pure H2O	1200	15.0	a
200	473.15	b	pure H2O	1400	15.6	a
250	523.15	b	pure H2O	100	2.8	a
250	523.15	b	pure H2O	200	6.0	a
250	523.15	b	pure H2O	300	9.6	a
250	523.15	b	pure H2O	400	12.1	a
250	523.15	b	pure H2O	500	14.3	a
250	523.15	b	pure H2O	600	16.4	a
250	523.15	b	pure H2O	800	20.4	a
250	523.15	b	pure H2O	1000	24.2	a
250	523.15	b	pure H2O	1200	27.2	a
250	523.15	b	pure H2O	1400	28.8	a
300	573.15	b	pure H2O	100	1.0	a
300	573.15	b	pure H2O	200	6.4	a
300	573.15	b	pure H2O	300	12.2	a
300	573.15	b	pure H2O	400	18.2	a
300	573.15	b	pure H2O	500	26.4	a
300	573.15	b	pure H2O	600	-	a
300	573.15	b	pure H2O	800	-	a
300	573.15	b	pure H2O	1000	-	a
300	573.15	b	pure H2O	1200	-	a
300	573.15	b	pure H2O	1400	-	a
350	623.15	b	pure H2O	200	3.6	a
350	623.15	b	pure H2O	300	14.3	a
350	623.15	b	pure H2O	400	-	a
350	623.15	b	pure H2O	500	-	a
350	623.15	b	pure H2O	600	-	a
350	623.15	b	pure H2O	800	-	a
350	623.15	b	pure H2O	1000	-	a
350	623.15	b	pure H2O	1200	-	a
350	623.15	b	pure H2O	1400	-	a
400	673.15	b	pure H2O	300	-	a
400	673.15	b	pure H2O	400	-	a
400	673.15	b	pure H2O	500	-	a
450	723.15	b	pure H2O	500	-	a
450	723.15	b	pure H2O	600	-	a
450	723.15	b	pure H2O	700	-	a
450	723.15	b	pure H2O	800	-	a
450	723.15	b	pure H2O	900	-	a

t/°C	T/K	Temp Note	Chemical Name	Pressure [bar]	Keunen coefficient, S	S Note
150	423.15	b	6 wt-% NaCl	100	2.5	a,c
150	423.15	b	6 wt-% NaCl	200	4.0	a,c
150	423.15	b	6 wt-% NaCl	300	4.7	a,c
150	423.15	b	6 wt-% NaCl	400	5.2	a,c
150	423.15	b	6 wt-% NaCl	500	5.6	a,c
150	423.15	b	6 wt-% NaCl	600	6.0	a,c
150	423.15	b	6 wt-% NaCl	800	6.6	a,c
150	423.15	b	6 wt-% NaCl	1000	7.2	a,c
150	423.15	b	6 wt-% NaCl	1200	7.7	a,c
150	423.15	b	6 wt-% NaCl	1400	8.0	a,c
200	473.15	b	6 wt-% NaCl	100	2.5	a,c
200	473.15	b	6 wt-% NaCl	200	4.4	a,c
200	473.15	b	6 wt-% NaCl	300	5.6	a,c
200	473.15	b	6 wt-% NaCl	400	6.5	a,c
200	473.15	b	6 wt-% NaCl	500	7.2	a,c
200	473.15	b	6 wt-% NaCl	600	7.9	a,c
200	473.15	b	6 wt-% NaCl	800	8.9	a,c
200	473.15	b	6 wt-% NaCl	1000	9.6	a,c
200	473.15	b	6 wt-% NaCl	1200	10.2	a,c
200	473.15	b	6 wt-% NaCl	1400	10.7	a,c
250	523.15	b	6 wt-% NaCl	100	2.4	a,c
250	523.15	b	6 wt-% NaCl	200	4.9	a,c
250	523.15	b	6 wt-% NaCl	300	6.8	a,c
250	523.15	b	6 wt-% NaCl	400	8.5	a,c
250	523.15	b	6 wt-% NaCl	500	10.0	a,c
250	523.15	b	6 wt-% NaCl	600	11.5	a,c
250	523.15	b	6 wt-% NaCl	800	13.4	a,c
250	523.15	b	6 wt-% NaCl	1000	14.8	a,c
250	523.15	b	6 wt-% NaCl	1200	16.1	a,c
250	523.15	b	6 wt-% NaCl	1400	17.0	a,c
300	573.15	b	6 wt-% NaCl	100	0.9	a,c
300	573.15	b	6 wt-% NaCl	200	4.6	a,c
300	573.15	b	6 wt-% NaCl	300	7.6	a,c
300	573.15	b	6 wt-% NaCl	400	10.5	a,c
300	573.15	b	6 wt-% NaCl	500	13.0	a,c
300	573.15	b	6 wt-% NaCl	600	15.3	a,c
300	573.15	b	6 wt-% NaCl	800	19.0	a,c
300	573.15	b	6 wt-% NaCl	1000	21.6	a,c
300	573.15	b	6 wt-% NaCl	1200	23.8	a,c
300	573.15	b	6 wt-% NaCl	1400	25.3	a,c
350	623.15	b	6 wt-% NaCl	200	3.2	a,c
350	623.15	b	6 wt-% NaCl	300	7.5	a,c
350	623.15	b	6 wt-% NaCl	400	11.5	a,c
350	623.15	b	6 wt-% NaCl	500	14.8	a,c
350	623.15	b	6 wt-% NaCl	600	18.0	a,c
350	623.15	b	6 wt-% NaCl	800	23.0	a,c
350	623.15	b	6 wt-% NaCl	1000	28.2	a,c
350	623.15	b	6 wt-% NaCl	1200	31.0	a,c
350	623.15	b	6 wt-% NaCl	1400	34.0	a,c
400	673.15	b	6 wt-% NaCl	300	1.7	a,c
400	673.15	b	6 wt-% NaCl	400	7.5	a,c
400	673.15	b	6 wt-% NaCl	500	13.5	a,c
450	723.15	b	6 wt-% NaCl	500	-	a,c
450	723.15	b	6 wt-% NaCl	600	-	a,c
450	723.15	b	6 wt-% NaCl	700	-	a,c
450	723.15	b	6 wt-% NaCl	800	-	a,c
450	723.15	b	6 wt-% NaCl	900	-	a,c

t/°C	T/K	Temp Note	Chemical Name	Pressure [bar]	Keunen coefficient, S	S Note
150	423.15	b	20 wt-% NaCl	100	0.9	a,d
150	423.15	b	20 wt-% NaCl	200	1.6	a,d
150	423.15	b	20 wt-% NaCl	300	2.2	a,d
150	423.15	b	20 wt-% NaCl	400	2.5	a,d
150	423.15	b	20 wt-% NaCl	500	2.8	a,d
150	423.15	b	20 wt-% NaCl	600	3.2	a,d
150	423.15	b	20 wt-% NaCl	800	3.8	a,d
150	423.15	b	20 wt-% NaCl	1000	4.3	a,d
150	423.15	b	20 wt-% NaCl	1200	4.8	a,d
150	423.15	b	20 wt-% NaCl	1400	5.3	a,d
200	473.15	b	20 wt-% NaCl	100	-	a,d
200	473.15	b	20 wt-% NaCl	200	-	a,d
200	473.15	b	20 wt-% NaCl	300	-	a,d
200	473.15	b	20 wt-% NaCl	400	-	a,d
200	473.15	b	20 wt-% NaCl	500	-	a,d
200	473.15	b	20 wt-% NaCl	600	-	a,d
200	473.15	b	20 wt-% NaCl	800	-	a,d
200	473.15	b	20 wt-% NaCl	1000	-	a,d
200	473.15	b	20 wt-% NaCl	1200	-	a,d
200	473.15	b	20 wt-% NaCl	1400	-	a,d
250	523.15	b	20 wt-% NaCl	100	1.0	a,d
250	523.15	b	20 wt-% NaCl	200	2.0	a,d
250	523.15	b	20 wt-% NaCl	300	2.8	a,d
250	523.15	b	20 wt-% NaCl	400	3.4	a,d
250	523.15	b	20 wt-% NaCl	500	4.1	a,d
250	523.15	b	20 wt-% NaCl	600	4.7	a,d
250	523.15	b	20 wt-% NaCl	800	5.7	a,d
250	523.15	b	20 wt-% NaCl	1000	6.6	a,d
250	523.15	b	20 wt-% NaCl	1200	7.6	a,d
250	523.15	b	20 wt-% NaCl	1400	8.2	a,d
300	573.15	b	20 wt-% NaCl	100	-	a,d
300	573.15	b	20 wt-% NaCl	200	-	a,d
300	573.15	b	20 wt-% NaCl	300	-	a,d
300	573.15	b	20 wt-% NaCl	400	-	a,d
300	573.15	b	20 wt-% NaCl	500	-	a,d
300	573.15	b	20 wt-% NaCl	600	-	a,d
300	573.15	b	20 wt-% NaCl	800	-	a,d
300	573.15	b	20 wt-% NaCl	1000	-	a,d
300	573.15	b	20 wt-% NaCl	1200	-	a,d
300	573.15	b	20 wt-% NaCl	1400	-	a,d
350	623.15	b	20 wt-% NaCl	200	1.1	a,d
350	623.15	b	20 wt-% NaCl	300	2.6	a,d
350	623.15	b	20 wt-% NaCl	400	3.9	a,d
350	623.15	b	20 wt-% NaCl	500	5.1	a,d
350	623.15	b	20 wt-% NaCl	600	6.2	a,d
350	623.15	b	20 wt-% NaCl	800	7.9	a,d
350	623.15	b	20 wt-% NaCl	1000	9.5	a,d
350	623.15	b	20 wt-% NaCl	1200	10.8	a,d
350	623.15	b	20 wt-% NaCl	1400	12.0	a,d
400	673.15	b	20 wt-% NaCl	300	-	a,d
400	673.15	b	20 wt-% NaCl	400	-	a,d
400	673.15	b	20 wt-% NaCl	500	-	a,d
450	723.15	b	20 wt-% NaCl	500	2.2	a,d
450	723.15	b	20 wt-% NaCl	600	4.2	a,d
450	723.15	b	20 wt-% NaCl	700	6.0	a,d
450	723.15	b	20 wt-% NaCl	800	7.6	a,d
450	723.15	b	20 wt-% NaCl	900	9.2	a,d

Notes:
   ^a  S₁ is solubility of CO₂, expressed as mass % of CO₂ in water and NaCl solutions.
   ^b  Calculated by the compiler.
   ^c  Molality of NaCl in the 6 mass % NaCl solution is m₂ = 1.09 mol kg^-1. (calculated by the compiler)
   ^d  Molality of NaCl in the 20 mass % solution is m₂ = 4.28 mol kg^-1. (calculated by the compiler)

Method/Apparatus/Procedure:
   The experimental apparatus was the same used in previous experimental work.¹ After equilibration the CO₂ and NaCl content of the liquid samples was analyzed. The CO₂ composition was determined by titration against standard HCl solution. CO₂ was absorbed in sodium hydroxide and estimated by back titration with HCl. The NaCl concentration of the solution was determined by the Mohr method using standardized AgNO₃ solution and a potassium chromate solution as an indicator. The composition of the co-existing gas phase was not determined.

Source and Purity of Materials:
   (1), (2), and (3): Source and purity not stated.

Estimated Errors:
   Solubility: δS₁ = ± 2 % (by authors)
   Temperature: δT/K = ± 0.8 % (by authors)

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

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Last updated: February 18, 2015 (Created: August 17, 2007)