Suppression of gas separation membrane plasticization by homogeneous polymer blending

Abstract

Plasticization is a phenomenon frequently encountered in the application

SPEEK/Matrimid blend membranes for CO2 separation

“…As the pressure exceeds 15 bar, the gas permeability starts to increase with pressure exhibiting CO 2 plasticization. Matrimid membranes in this study were annealed to higher temperatures than earlier studies (x compared to y • C) [12] which already contributes to shifting the plasticization pressure from 10 to 15 bar. S-PEEK, on the other hand, does not show any sign of plasticization until 40 bar.…”

“…Considering this opportunity, blends of S-PEEK with Matrimid were made. Matrimid was chosen because it is a commonly available commercial polymer studied for gas separation, possesses good mechanical properties and is thermally stable [8,[12][13][14]. The effect of chemical cross-linking and different operating conditions on the performance of blend membranes was studied and compared with the individual polymers.…”

Membrane technologies for CO2 capture

“…In addition, also the occurrence of flooding and entrainment of the absorption liquid may occur and limits the process as the gas and the liquid streams cannot be controlled independently [22][23][24][25].…”

“…They used hydrophobic porous membranes for absorber and desorber and an aqueous potassium carbonate solution as absorption liquid for CO 2 removal. With increasing flow rate the CO 2 permeation rate increased as well and fluxes as high as 0.001 mol/s at the highest flow rate and a concentration of 10 wt.% K 2 CO 3 were obtained [22]. Kosaraju et al…”

“…A method to limit the evaporation of the liquid is to not only use a membrane contactor as absorber, but to also use it as desorber. Lee et al [22] used such a system with a membrane contactor for both absorption and desorption. They used hydrophobic porous membranes for absorber and desorber and an aqueous potassium carbonate solution as absorption liquid for CO 2 removal.…”