Facilitated transport of CO2 through ethylenediamine-fixed cation-exchange polysaccharide membranes

Polymeric Facilitated Transport Membranes for Hydrogen Purification

“…12 A novel ion-exchange membrane was obtained by cross-linking a polysaccharide, sodium alginate, followed by exchange to form the EDAH ϩ -containing membrane. 13 Exponential increases in both CO 2 permeance and selectivity resulted from increasing the EDAH ϩ concentration in the membrane, but a modest CO 2 /N 2 selectivity of about 50 suggests that this membrane might not be suitable for CO 2 /H 2 separations.…”

Composite hollow fiber membranes for CO2 capture

“…In recent years the investigations of different fixed site carrier (FSC) membranes operated with humidified gas streams showed that facilitation mechanism becomes the predominant mechanism for CO 2 transport over the solution-diffusion mechanism. Different membrane materials with functional groups as specific carriers for CO 2 by several authors [6][7][8][9][10][11][12][13][14][15][16][17]. All these studies point out that the CO 2 is transported simultaneously via facilitated transport and solutiondiffusion and that CO 2 is transported mainly by facilitated transport rather than solution-diffusion mechanism at low feed pressure.…”

“…The papers reporting on different FSC membranes [6][7][8][9][11][12][13][14][15][16][17][18][19] are focusing almost exclusively on the material properties of the selective layer, on the importance of water inside of the selective film for the CO 2 facilitation transport, on crosslinking procedures to enhance the mechanical stability and on the presence or absence of facilitation effect. None or very few papers correlate the preparation of the composite FSC membranes with their separation performances and mechanical stability under different operation modes (sweep or vacuum) [20].…”

Influence of heat-treatment on CO2 separation performance of novel fixed carrier composite membranes prepared by interfacial polymerization

“…For CO 2 fixed carrier membranes, water is more important for facilitated transport of CO 2 . In these membranes, water is not only a swollen solvent, but also a reaction medium [12][13][14][15][16][17]. In the case of wet membranes, some researchers [14][15][16][17] considered that CO 2 reacts with the carrier (primary amine group or secondary amine group) and water to produce a complex (RNHCOO − ) and HCO 3 − within the membrane, as shown in the following formulas:…”