Table 7

Membrane type		Permeance or permeability		Selectivity		Ref.
	H₂	CH₄	N₂	H₂/CH₄	H₂/N₂
Silicone-coated PSf	16^a	0.47^a	0.37^a	34.04	43.24	[26]
PSf /PDMS	62.94^b	3.09^b	2.87^b	20.4	22	[27]
PSf/Silica (85/15 vol.%)	22.7^a	0.62^a	0.67^a	36.61	33.88	[28]
PBN/PI (15 wt.%)	14.31^a	1.78^a	- - -	8.04	- - -	[29]
Present work	25^b	0.54^b	0.49^b	46.3	51.0

^abarrer (10−10 cm³ (STP)cm/(cm² s cmHg)
^bGPU

Table 7: A comparison between the present work and the other studies.