Abstract
Although polymeric membranes have been extremely applied in different gas separations, improving their permeability-selectivity data is still challenging. This goal encouraged the authors to fabricate a new nanocomposite membrane (NCM) composed of poly(ether-block-amide)− 1657 (PEBAX) and magnesium oxide (MgO) nanofillers for CO2/CH4 separation. The influence of various loadings of the nanoparticles (2, 4, 6, and 8 wt%) on gas (CO2 and CH4) transport characteristics of PEBAX-based nanocomposite membranes was investigated at pressure and temperature ranges of 3–15 bar and 25–55 °C, respectively. The pristine and NCMs were fabricated via solution casting, followed by the solvent evaporation method, and characterized by different analyses (FESEM, FT-IR, XRD, and TGA). The observed experimental outcomes showed that adding MgO nanofillers into the PEBAX polymeric structure improves the performance of the produced NCMs for the CO2/CH4 separation. The permeability of CO2 and the ideal selectivity of CO2/CH4 for 8 wt% of MgO-embedded NCM are 83.29 Barrer and 25.32, whereas those quantities, in the absence of nanoparticles, are 64.66 Barrer and 21.84.
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