Gas transport property of polyallylamine–poly(vinyl alcohol)/polysulfone composite membranes

Transport properties of PVA/PEI/PEG composite membranes: sorption and permeation characterizations

“…Therefore, the decrease in the facilitation effect beyond of certain PEI content can only be explained by a change in the values of the material transport parameters. Cai et al [13] studied the change in the crystallinity of the PVA membranes made of PVA blends with polyallylamine with the polyamine content and found that there was an inverse relationship between the PVA crystallinity and the gas permeance of the blend membranes. The situation should be the same with our The compact organization of polymer crystallites prevents any sorption of the permeant molecules in their structure.…”

Facilitated transport of CO2 in novel PVAm/PVA blend membrane

“…Recently Ho and co-workers [20,21] published their results on CO 2 separation from H 2 , N 2 and CO by a polyallylamine (PAAm), amino acid salt, potassium hydroxide and PVA blend membrane, which was claimed to contain both mobile and fixed carriers. Cai et al [22] also reported a PAAm/PVA blend membrane with selectivities for CO 2 over N 2 and CO 2 over CH 4 of 80 and 58, respectively. Kim et al [23] prepared a composite polyvinyl amine (PVAm) membrane for CO 2 capture.…”

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].…”