SDS Volume
Volume 62. Carbon Dioxide in Water and Aqueous Electrolyte Solutions, p None
Source Publication
Conditions:
Room Temp:
323.15 and 348.15
$\pu{K}$
Pressure:
37.9 bar - 145.1 bar
$\pu{bar}$
Molality (2):
m2/mol kg-1 = 0.95 - 2.72
mol/kg
Compiler:
Methodology:
The apparatus was designed for the measurement of $\ce{Na2SO4}$ solubility in aqueous solutions of $\ce{CO2}$. The equilibrium cell is a high pressure stainless steel Jerguson liquid level gauge with an internal volume of about 150 mL. Mixing is achieved by recirculating both phases for about four hours. The apparatus is in an air bath controlled to $\pu{\pm 0.1 K}$, pressure is measured with a Heise bourdan tube pressure gauge to $\pu{\pm 0.02 MPa}$. The carbon dioxide is measured in a calibrated, about 1.3 mL, sampling loop. The gas is 'flashed' to atmospheric pressure and the volume of $\ce{CO2}$ gas measured to an accuracy of $\pu{1\%}$ by displacement of a $\ce{CO2}$ saturated aqueous solution.
Sample Information:
- Carbon dioxide. No information.
- Sodium sulfate. No information.
- Water. No information.
Measurement Errors:
Ambient temperature: δT/K = ±0.1
Mass concentration (m/v) (1): δx1/x1 = ±0.01
Pressure: δP/bar = ±0.2
System Components:
- Carbon dioxide, $\ce{ CO2 }$; [124-38-9] NIST WebBook
- Sodium sulfate, $\ce{ Na2SO4 }$; [7757-82-6] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The paper contained no definitve statement as to whether total pressure or partial pressure was measured or as to how mole fraction was calculated.
| $T$ ($\pu{K}$) | $T$ (°C) | m1 (mol/kg) | m2 (mol/kg) | $x_{1}$ | $P$ ($\pu{bar}$) |
|---|---|---|---|---|---|
| 323.15 | 50 | 0.370a | 1.95 | 5.99 x 10-3 | 95.6 |
| 323.15 | 50 | 0.388a | 1.98 | 4.62 x 10-3 | 137.6 |
| 323.15 | 50 | 0.222a | 2.71 | 4.48 x 10-3 | 37.9 |
| 323.15 | 50 | 0.296a | 2.72 | 7.87 x 10-3 | 75.8 |
| 348.15 | 75 | 0.263a | 0.95 | 9.33 x 10-3 | 97.9 |
| 348.15 | 75 | 0.463a | 0.96 | 2.59 x 10-3 | 43.1 |
| 348.15 | 75 | 0.550a | 0.97 | 4.28 x 10-3 | 72.1 |
| 348.15 | 75 | 0.159a | 1.97 | 6.54 x 10-3 | 132.7 |
| 348.15 | 75 | 0.263a | 1.91 | 6.27 x 10-3 | 145.1 |
| 348.15 | 75 | 0.405a | 2.01 | 3.47 x 10-3 | 76.6 |
(a) Calculated by compiler.
It was assumed the mole fraction was based on the total moles,
nt = nCO2 + nH2O + nNa+ + nSO42-.
