Characterization of hollow fiber membranes in a permeator using binary gas mixtures

PVDF/ionic liquid polymer blends with superior separation performance for removing CO2 from hydrogen and flue gas

“…The permeate gas was injected into a GC for analysis. The permeability was calculated with the consideration of non-ideal gas behavior, described by Wang et al [34]. The permeability of each gas was obtained using equations (5) and (6):…”

SPEEK/Matrimid blend membranes for CO2 separation

“…The competetive sorption of the penetrante gas molecules and CO 2 plastcization are two of the most important issues that must be addressed when evaluating such performance. The difference between the ideal and mixed gas selectivity has been ascribed to penetrants competition, especially when one penetrant gas has a high sorption in the polymer [18,19]. In addition, CO 2 plasticization is another serious problem associated with glassy polymeric membranes in industrial applications.…”

Mixed-gas CO2/CH4 and CO2/N2 separation with sulfonated PEEK membranes

“…Tables 2 and 3 show rather small differences in the permeability and selectivity between the pure and the mixed gas measurements for S-PEEK(Na). The transport of one component is thus to a rather small extent affected by the presence of the other, resulting in a slightly lowered permeability of the preferentially permeating component and hence reducing the mixed gas selectivity [29,30]. This effect becomes more significant in the presence of carbon dioxide in the mixture due to its condensability inducing carbon dioxide plasticization.…”