On the effects of plasticization in CO2/light gas separation using polymeric solubility selective membranes

Biohydrogen purification by membranes: An overview on the operational conditions affecting the performance of non-porous, polymeric and ionic liquid based gas separation membranes

“…In other words, in multi-compound gaseous mixtures the presence of one gas affects the transport of the other(s), leading eventually to various separation limiting phenomena such as (penetrant induced) plasticization, competitive sorption, concentration polarization, etc. [19,51,81].…”

“…In other words, plasticization reduces the gas transport resistance of the membranes, leading to higher permeability of all the gas species and hence generally causing depressed selectivity. It is typical for both glassy and rubbery membranes, but has greater impact on the former ones which separate components based on their diffusion difference, meanwhile the members of the latter category rely on distinct solubility properties rather than diffusivity [81]. A couple of approaches have been proposed in order to avoid plasticization as listed in Table 1.…”

“…Thermal treatment Kawakami et al [46] Chemical cross linking Choi et al [21] Lin et al [59] Tin et al [94] Polymer blending Car et al [16] Khan et al [48] Reijerkerk et al [80,81] Yave et al [101] i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 3 ) 1 e1 …”

Poly(amide-12-b-ethylene oxide)/glycerol triacetate blend membranes for CO2 separation

“…In practical application, it is difficult to meet the required separation demands especially when the CO 2 concentration in gas mixtures is high, because the plasticization induced by CO 2 can significantly decrease gas permselectivity (Lo et al, 2010). In the case of CO 2 /H 2 separation, these membranes are more permeable to H 2 than CO 2 , resulting in low pressure H 2 product which requires additional recompression (Reijerkerk et al, 2011a). Therefore, in order to improve CO 2 permeation performance, some new rubbery polymers, which usually contain CO 2 -philic groups, such as carbonyl, ether, acetate groups, have been developed as membrane materials recently aiming to increase CO 2 solubility and CO 2 solubility selectivity.…”

Materials challenges in carbon-mitigation technologies

“…Although large-area polymeric membranes are easily fabricated, their size-sieving ability can be reduced by polymer swelling when CO 2 is present. 45 Inorganic membranes are more chemically stable in the presence of CO 2 , but they are hard to fabricate at a large scale. One approach that could combine the strengths of the two technologies is the dispersion of inorganic particles into a continuous polymeric base membrane.…”