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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Synthetic sea water
Components:
(1) Synthetic sea water; ; []
NIST Chemistry WebBook
for detail
(2) Carbon dioxide; CO2; [124-38-9]
NIST Chemistry WebBook
for detail
Original Measurements:
Stewart, P.B.; Munjal, P., J. Chem. Eng. Data 1970, 15, 67-71.
Variables:
Temperature = 268.15 K to 298.15 K
Pressure = 0.101 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]
Molality m
1
m
1
Note
268.15
1.01
0.310
b
268.15
5.07
1.446
b
268.15
10.13
2.752
b
268.15
20.26
4.781
b
268.15
30.40
5.604
b
273.15
1.01
0.265
b
273.15
5.07
1.248
b
273.15
10.13
2.358
b
273.15
15.20
3.312
b
273.15
20.26
4.152
b
273.15
30.40
5.604
b
273.15
34.45
6.007
b
278.15
1.01
0.220
b
278.15
5.07
1.043
b
278.15
10.13
2.004
b
278.15
20.26
3.548
b
278.15
30.40
4.843
b
278.15
38.50
5.601
b
283.15
1.01
0.191
b
283.15
5.07
0.889
b
283.15
10.13
1.701
b
283.15
20.26
3.042
b
283.15
30.40
4.140
b
283.15
38.50
4.801
b
285.15
1.01
0.173
b
285.15
5.07
0.790
b
285.15
10.13
1.558
b
285.15
20.26
2.805
b
285.15
30.40
3.805
b
285.15
45.60
4.852
b
288.15
1.01
0.155
b
288.15
5.07
0.740
b
288.15
10.13
1.411
b
288.15
20.26
2.531
b
288.15
30.40
3.453
b
288.15
45.60
4.379
b
298.15
1.01
0.110
b
298.15
5.07
0.551
b
298.15
10.13
1.023
b
298.15
20.26
1.822
b
298.15
30.40
2.397
b
298.15
45.60
3.090
b
B. Synthetic sea water concentrate
a
(Salts content 3 times normal)
T/K
Pressure [bar]
Molality m
1
m
1
Note
273.15
10.13
2.149
b
273.15
20.26
3.892
b
273.15
34.45
5.451
b
285.55
10.13
1.351
b
285.55
20.26
2.411
b
285.55
45.60
4.052
b
298.15
10.13
0.907
b
298.15
20.26
1.612
b
298.15
45.60
2.751
b
C. Synthetic sea water concentrate
a
(Salts content 5 times normal)
T/K
Pressure [bar]
Molality m
1
m
1
Note
273.15
10.13
2.043
b
273.15
20.26
3.552
b
273.15
34.45
5.253
b
285.55
10.13
1.214
b
285.55
20.26
2.192
b
285.55
45.60
3.672
b
Notes:
a
Composition of sea water is given in the following table.
m
I
= mass of component
I
.
b
m
1
/
m
2
= solubility of carbon dioxide;
m
1
= mass of CO
2
;
m
2
= mass of solvent.
Table 1
A
NaCl 26.518 m/g, MgCl
2
2.447 m/g, MgSO
4
3.305 m/g, CaCl
2
1.141 m/g, KCl 0.725 m/g, NaHCO
3
0.202 m/g, NaBr 0.083 m/g, H
2
O 965.579 m/g.
Table 2
B
NaCl 79.554 m/g, MgCl
2
7.341 m/g, MgSO
4
9.915 m/g, CaCl
2
3.423 m/g, KCl 2.175 m/g, NaHCO
3
0.606 m/g, NaBr 0.249 m/g, H
2
O 896.737 m/g.
Table 3
C
NaCl 132.590 m/g, MgCl
2
12.235 m/g, MgSO
4
16.525 m/g, CaCl
2
5.705 m/g, KCl 3.625 m/g, NaHCO
3
1.010 m/g, NaBr 0.415 m/g, H
2
O 827.895 m/g.
Method/Apparatus/Procedure:
Rocking equilibrium cell fitted with Bourdon-type pressure gauges. Carbon dioxide gas admitted to cell containing sea 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
Estimated Errors:
Solubility: δ(10
2
m
1
/m
2
) = ± 1 %
Temperature: δ
T
/K = ± 0.06
Pressure: δ
P
/kPa = ± 2 below 3.6 MPa, ± 3.4 above 3.6 Mpa