IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitrogen with Carbon dioxide, Methane and Polyetherimide (PEI)

Components:
   (1) Nitrogen with Carbon dioxide, Methane; N2, CO2, CH4; [7727-37-9, 124-38-9, 74-82-8]  NIST Chemistry WebBook for detail
   (2) Polyetherimide (PEI); ; [61128-24-3]  NIST Chemistry WebBook for detail

Original Measurements:
   T.A. Barbari, W.J. Koros and D.R. Paul, J. Polym. Sci., Part B: Polym. Phys. 26, 729-744 (1988).

Variables:
   Temperature = 308 K
   Pressure = 0-2.3 MPa

Prepared By:
   A.K. Bokarev

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

Table 1. Dual-mode sorption parameters for various gases in polyetherimide at 308 K
Chemical Name	Henry's law constant, K [cm³(STP)/cm³ atm]	Langmuir's parameter, C_H [cm³(STP) cm^-3]	Affinity Coefficient b [atm^-1]
CO2	0.758	25.02	0.366
CH4	0.207	7.31	0.136
N2	0.063	4.15	0.045

Table 2. Sorption isotherms of various gases in polyetherimide at 308 K (The original data were represented graphically)
Chemical Name	Pressure [MPa]	Sorption [(V₁(STP)/V₂)]
CO2	0.19	10.88
CO2	0.24	12.85
CO2	0.27	14.26
CO2	0.33	15.38
CO2	0.56	20.05
CO2	0.64	21.83
CO2	0.70	23.23
CO2	0.78	23.79
CO2	0.98	26.96
CO2	1.08	28.17
CO2	1.16	29.10
CO2	1.25	29.75
CO2	1.45	32.17
CO2	1.55	33.10
CO2	1.64	33.93
CO2	1.72	34.39
CO2	1.93	36.43
CO2	2.02	37.36
CO2	2.20	38.37
CH4	0.12	1.12
CH4	0.24	2.10
CH4	0.29	2.51
CH4	0.37	3.08
CH4	0.45	3.59
CH4	0.67	4.78
CH4	0.81	5.35
CH4	0.90	5.81
CH4	1.07	6.55
CH4	1.14	6.59
CH4	1.25	7.29
CH4	1.29	7.17
CH4	1.48	7.98
CH4	1.57	8.15
CH4	1.66	8.53
CH4	1.79	8.69
CH4	1.89	9.15
CH4	2.06	9.60
N2	0.27	0.65
N2	0.34	0.81
N2	0.40	0.83
N2	0.45	0.98
N2	0.71	1.44
N2	0.77	1.59
N2	0.88	1.65
N2	0.94	1.78
N2	1.14	2.11
N2	1.25	2.24
N2	1.34	2.26
N2	1.42	2.35
N2	1.59	2.70
N2	1.75	2.93
N2	1.79	2.85
N2	1.89	2.94
N2	2.26	3.39
N2	2.35	3.52

Method/Apparatus/Procedure:
   The sorption apparatus and procedures used in the present sorption experiments are the same as described earlier.¹

Source and Purity of Materials:
   Gas: purity> 99.99 % (chromatographic quality). PHI (Ultem): General Electric Co., density 1.28 g/cm³, glass transition temperature 488 K.

Estimated Errors:

   Temperature: No information given.

References:
   ¹W 3. Koros, D. R. Paul, and A. A. Rocha, J. Polytn. Sci., Polym. Plays. Ed. 14, 687 (1976).