IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Hexafluorpolycarbonate (HFPC)

Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Hexafluorpolycarbonate (HFPC); ; [32291-26-2]  NIST Chemistry WebBook for detail

Original Measurements:
   G.K. Fleming and W.J. Koros, J. Polym. Sci., Part B: Polym. Phys. 28, 1137 (1990).

Variables:
   Temperature = 308 K
   Pressure = 308 K

Prepared By:
   V.I. Bondar

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

Table 1. Sorption and desorption isotherms of carbon dioxide in HFPC at 308 K (The original data were represented graphically)
Pressure [MPa]	Solubility [(V₁(STP)/V₂)]	Remark(s)
0.59	30.19	Sorption
0.88	36.46	Sorption
1.20	42.07	Sorption
1.54	46.17	Sorption
1.83	49.61	Sorption
2.08	52.41	Sorption
2.23	53.70	Sorption
2.39	54.99	Sorption
2.63	57.14	Sorption
2.89	59.07	Sorption
3.12	60.57	Sorption
3.29	61.42	Sorption
0.32	13.48	Desorption
0.69	20.83	Desorption
1.03	26.23	Desorption
1.37	30.76	Desorption
1.63	36.60	Desorption
1.91	40.70	Desorption
2.11	43.72	Desorption
2.37	47.82	Desorption
2.60	51.28	Desorption
2.77	53.43	Desorption
2.94	56.24	Desorption
3.09	58.40	Desorption
3.29	61.42	Desorption

Table 2. Sorption isotherms of carbon dioxide in HFPC at 308 K in fugacity basis (The original data were represented graphically)
Sorption [(V₁(STP)/V₂)]	Fugacity [MPa]
16.40	0.36
26.28	0.72
33.42	1.08
38.05	1.36
42.04	1.63
45.62	1.85
49.40	2.11
52.97	2.32
55.92	2.52
58.65	2.68
61.38	2.82

Table 3. Dual mode sorption parameters for carbon dioxide in HFPC at 308 K
Henry's law constant, K [cm³ (STP) cm^-3 atm^-1]	Langmuir's parameter, C_H [cm³(STP) cm^-3]	Affinity Coefficient b [atm^-1]	Remark(s)
1.09	28.05	0.255	Type: Pressure
1.33	25.48	0.275	Type: Fugacity

Method/Apparatus/Procedure:
   Pressure decay sorption cell and procedure were described in Ref. 1.

Source and Purity of Materials:
   HFPC: Dow Chemical Co., density 1.478 g/cm³, glass transition temperature 445 K, d spacing 5.8 A (WAXD method). The polymer was conditioned before measurement of sorption isotherms by exposing to CO₂ at 33 atm.

Estimated Errors:

   Temperature: No information given.

References:
   ¹G. K. Fleming and W. J. Koros, Macromolecules 19, 2285 (1986).