DEA (wt%)
Permeance
*
CO
2
/CH
4
Selectivity
CO
2
CH
4
0
1.620
0.0392
41.32
5
3.504
0.0795
44.07
15
4.512
0.0858
52.59
25
3.752
0.0746
50.29
35
2.569
0.0704
36.49
45
2.083
0.0535
38.93
Table 2
: The effect of various amine concentrations on DEA-impregnated crosslinked PVA membranes with an average ratio of formaldehyde (about 3 wt%) (Pure gas results, P=152 cmHg).
