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Table 4 Hydrogen and methane permeation data for polyetherimide membrane made from NMP and GBL at 25 °C and different feed pressures

From: Preparation of polyetherimide membrane from non-toxic solvents for the separation of hydrogen from methane

Sample

PEI wt%

Feed pressure

Permeance (GPU)

Selectivity

H2

CH4

NMP-23

23

3

464.2

248.9

1.9

 

5

493.3

280.8

1.8

 

7

530.2

311.9

1.7

 

10

580.0

355.6

1.6

NMP-27

27

3

43.7

14.5

3.0

 

5

47.1

16.1

2.9

 

7

48.7

17.3

2.8

 

10

51.1

19.8

2.6

GBL-23

23

3

109.3

43.2

2.5

 

5

129.3

56.9

2.3

 

7

141.5

80.8

1.8

 

10

153.5

94.3

1.6

GBL-27

27

3

1.1

0.3

3.3

 

5

1.8

0.7

2.6

 

7

1.9

0.8

2.4

 

10

2.0

1.0

2.0