Table 3: Permeability, diffusivity and solubility for hydrogen and carbon dioxide from the time lag method.

Hydrogen Carbon dioxide Selectivity (PH2/PCO2)
Assay Permeability (barrers) Diffusivity (cm^2/s X) E-07 Solubility (cm^3 (STP)/cm^3 cm Hg) Permeability (barrers) Diffusivity (cm^2/s X) E-08 Solubility (cm^3 (STP)/cm^3 cm Hg)
A 7.43 ± 0.00 4.38 ± 0.36 0.0017 2.97 ± 0.00 4.10 ± 0.25 0.0072 2.50
B 6.69 ±0.00 4.00 ± 0.40 0.0017 3.34 ± 0.00 4.93 ± 0.06 0.0068 2.00
C 10.07 ± 0.00 4.97 ± 0.47 0.0020 2.88 ± 0.00 5.16 ± 0.27 0.0056 3.50
D 8.092 ± 0.76 8.62 ± 0.94 0.0009 3.24 ± 0.00 9.77 ± 0.42 0.0033 2.50
E 5.09 ± 0.48 1.31 ± 0.10 0.0039 2.72 ± 0.00 1.97 ± 0.14 0.0138 1.87
F 5.86 ± 0.36 1.34 ± 0.16 0.0044 2.80 ± 0.36 2.98 ± 0.11 0.0094 2.09
G 10.51 ± 0.00 2.35 ± 0.32 0.0045 3.94 ± 0.00 3.47 ± 0.22 0.0113 2.66
H 6.41 ± 0.00 2.11 ± 0.00 0.0030 2.71 ± 0.35 2.58 ± 0.08 0.0105 2.36

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