0.1
1
10
100
1000
0
5
10
15
Na wt%
CO2
CH4
K*10
3
[molec/barÅ
3
]
Fig. 6 Adsorption constant of CO 2 as a function of the Na content of FAU zeolites. Adapted from
[22]
0.0
1.0
2.0
3.0
4.0
0.00
0.05
0.10
0.15
0.1
1
10
100
1000
Relative working capacity
K CO2 X10 3 [molec/barÅ 3 ]
Fig. 7 Working capacity and separation factor for the CO 2 /CH 4 separation, calculated from the
Ruthven Statistical Model as a function of the adsorption constant of CO 2 . Adapted from [22]
208
J. Pérez-Pellitero and G. D. Pirngruber