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 N,N,N,-Trimethyl-1-hexadecanaminium bromide; (Cetyltrimethylammonium bromide) and Water
Components:
(1) N,N,N,-Trimethyl-1-hexadecanaminium bromide; (Cetyltrimethylammonium bromide); C19H42N.Br; [57-09-0]
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:
Ownby, D. W.; Prapaitrakul, W.; King, A.D. Jr., J. Colloid Interface Sci. 1988, 125, 526-33.
Variables:
Temperature = 298.15 K
Concentration =
m
2
/mol kg
-1
= 0.0 - 0.4
Prepared By:
H.L. Clever
Experimental Remarks:
The measurements are made at several pressures up to 10 - 15 atm (1 - 1.5 MPa). The solubility values have been corrected to 1 atm (0.103 MPa) partial pressure of CO
2
. See method below.
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
Solubility of carbon dioxide in aqueous cetyltrimethylammonium bromide.
t/°C
T/K
Temp Note
10
2
* Molality m
1
[mol/kg]
m
1
Note
Molality m
2
[mol/kg]
m
2
Note
25
298.15
a
3.28
c
0.0
b
25
298.15
a
3.46
c
0.1
b
25
298.15
a
3.60
c
0.2
b
25
298.15
a
3.73
c
0.3
b
25
298.15
a
3.88
c
0.4
b
Notes:
a
Added by the compiler.
b
m
2
= molality of cetyltrimethylammonium bromide.
c
m
1
= solubility of carbon dioxide.
Method/Apparatus/Procedure:
The apparatus and method are described in earlier papers (1, 2). Solubility is determined in a thermostatted, magnetic stirred cylindrical brass bomb with an observation window. The solution is prepared and put in a glass liner in the bomb. The system is sealed, evacuated to a pressure just above water vapor pressure, and outgassed with stirring for several hours. The gas is added to a known pressure and equilibrated with stirring for a minimum of five hours. Stirring is stopped, the solution is allowed to become still. The gas is vented leaving the supersaturated solution under a gaseous pressure of atmospheric pressure for a fixed time of 30 to 60 seconds. The rate of gas loss during the still condition is measured to use in a later correction. The gas is stirred and collected. The total volume of gas is measured along with ambient pressure and temperature.
Source and Purity of Materials:
(1) Carbon dioxide. Matheson Gas products. Commercial grade, stated to be 99.5 % min purity.
(2) Cetyltrimethylammonium bromide. Lancaster Synthesis Ltd. Stated to be 98.0 %.
(3) Water. Nothing specified, but have used doubly distilled water in earlier work.
Estimated Errors:
Solubility: δ
m
1
/mol kg
-1
= 0.02 x 10
-2
Temperature: δ
T
/K not specified.
References:
1. Matheson, I.B.C; King, A.D. Jr., J. Colloid Interface Sci. 1978, 66, 464.
2. Bolden, P.L.; Hoskins, J.C.; King, A.D. Jr., J. Colloid Interface Sci. 1983, 91, 454.