A comparative study between single gas and mixed gas permeation of polyether-block-amide type copolymer membranes

We analyze the gas separation performance of five polyether-block-amide type copolymers (Pebax® 1657, Renew®, 2533, 3533 and 4533). These codes are composed different hard rubbery segments with proportions. Dense membranes were prepared by casting-solution method studied elemental, thermogravimetric X-ray diffraction analyses, FTIR-ATR spectroscopy single mixed permeation. Codes best those polyethylene oxide as soft phase 1657 Renew®) due to more intense interactions this segment CO 2 , which increases /N solubility selectivity (17.5 30.5 for Pebax® respectively) hence membrane (36 37 respectively, obtained from permeation). It is also noticeable that proportion in copolymer determines permeability . was found a greater soft/hard ratio 2533 3533) have value (239 220 Barrer 3533, measured Renew® polymer permeabilities 167 164 selectivities 41 37, permeation, respectively. The comparison between mixture permeation results revealed relatively good correspondence both most tuned diffusion properties polymers. • studied. Results time lag experiments compared system. nature PA PE determined final performance. Apparent activation energies calculated using methods.