Home
Introduction
Search Menu
IUPAC Series (PDF)
Reference
Version History
About the Project
Disclaimer
Contact Us
Acknowledgements
IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Sodium sulfate and Water
Components:
(1) Sodium sulfate; Na2SO4; [7757-82-6]
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:
Corti, H. R.; Krenzer, M. E.; de Pablo, J. J.; Prausnitz, J. M., Ind. Eng. Chem. Res. 1990, 29, 1043-50.
Variables:
Temperature = 323.15 K and 348.15 K
Pressure = 37.9 bar to 145.1 bar
Concentration =
m
2
/mol kg
-1
= 0.95 - 2.72
Prepared By:
H.L. Clever
Experimental Remarks:
The paper contained no definitve statement as to whether total pressure or partial pressure was measured or as to how mole fraction was calculated.
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
t/°C
T/K
Temp Note
Pressure [bar]
Mole Fraction (x
1
)
Molality m
1
[mol/kg]
m
1
Note
Molality m
2
[mol/kg]
50
323.15
a
95.6
5.99
0.370
a
1.95
50
323.15
a
137.6
4.62
0.388
a
1.98
50
323.15
a
37.9
4.48
0.222
a
2.71
50
323.15
a
75.8
7.87
0.296
a
2.72
75
348.15
a
97.9
9.33
0.263
a
0.95
75
348.15
a
43.1
2.59
0463
a
0.96
75
348.15
a
72.1
4.28
0.550
a
0.97
75
348.15
a
132.7
6.54
0.159
a
1.97
75
348.15
a
145.1
6.27
0.263
a
1.91
75
348.15
a
76.6
3.47
0.405
a
2.01
Notes:
a
Calculated by compiler.
It was assumed the mole fraction was based on the total moles,
n
t
=
n
CO
2
+
n
H
2
O
+
n
Na
+
+
n
SO
4
2-
.
Method/Apparatus/Procedure:
The apparatus was designed for the measurement of N
2
SO
4
solubility in aqueous solutions of CO
2
. The equilibrium cell is a high pressure stainles steel Jerguson liquid level gage with an internal volume of about 150 mL. Mixing is achieved by recirculating both phases for about 4 hours. The apparatus is in an air bath controlled to ± 0.1 K, pressure is measured with a Heise bourdan tube pressure gage to ± 0.02 MPa. The carbon dioxide is measured in a calibrated, about 1.3 mL, sampling loop. The gas is "flashed" to atm pressure and the volume of CO
2
gas measured to an accuracy of 1% by displacement of a CO
2
saturated aqueous solution.
Source and Purity of Materials:
(1) Carbon dioxide. No information.
(2) Sodium sulfate. No information.
(3) Water. No information.
Estimated Errors:
Solubility: δ
x
1
/
x
1
= ± 0.01
Temperature: δ
T
/K = ± 0.1
Pressure: δP/bar = ± 0.2