Nanocomposite membrane Modifier agent Ideal selectivity CO2/CH4 Ideal selectivity O2/N2 References 20% wt MCM-48/PSF No modifier 23.58 5.38 [17] 20% wt MCM-41/PSF No modifier 18.9 5.47 [16] 20% wt modified MCM-48/PSF Trimethylchlorosilane (TMCS) 23 5 [18] 20% wt modified MCM-48/PSF coated by PDMS Dimethyldichlorosilane (DMDCS) 27.2 6.2 Present work

Table 7: Ideal selectivity comparison ofcoated 20% MCM-48/PSF MMM of this work with 20% MCM-48/PSF and 20% MCM-41/PSF MMMs of previous researches.