Permeation of supercritical carbon dioxide through polymeric hollow fiber membranes

Separation of n-butane from soybean oil mixtures using membrane processes

“…The polymeric membranes in contact with organic solvents tend to swell and lose their separation capabilities. When swelling occur, transport properties are difficult to establish [26]. The transport is also affected by other parameters such as surface tension and solubility parameter of the permeating solvent [36].…”

“…Degumming and solvent recovery are the most studied process, since they are the most energy-consuming steps in the oil processing industry [1][2][3][4][5][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. One should call attention at this point that in the extraction process using compressed fluids, membrane separation could be advantageously used for minimizing solvent recompression costs [25,26].…”

Effect of dense CO2 on polymeric reverse osmosis and nanofiltration membranes and permeation of mixtures of macauba oil (Acrocomia aculeata) and CO2

“…Detailed studies about the use of commercial polymeric membranes in supercritical CO 2 systems are still limited, although there are some instances of applications of this approach using commercial thin film membranes with supercritical CO 2 [4,6,7]. Studies report that different membranes made of polyvinyl alcohol (PVA) and a polyamide copolymer (IPC) were available with a good CO 2 permeability and offer possibilities for efficient regeneration of carbon dioxide while maintaining supercritical conditions [7].…”

“…Studies report that different membranes made of polyvinyl alcohol (PVA) and a polyamide copolymer (IPC) were available with a good CO 2 permeability and offer possibilities for efficient regeneration of carbon dioxide while maintaining supercritical conditions [7]. Sarmento et al [3] verified that the polymeric membranes used (DL, HL -Osmonics and NF -Dowfilmtec) showed a good mechanical resistance and good permeability values for pure supercritical CO 2 and for its mixture with cocoa extract.…”

“…These interactions can lead to phenomena as the swelling of the polymeric matrix, plasticisation or even dissolution of membrane material and subsequent loss of morphological structure, causing changes in separation properties, mainly in the membrane selectivity, and/or mechanical resistance under pressure [7,9]. Therefore studies in this field can promote benefits to different industries and stimulate the development of new membranes to be used with supercritical CO 2 .…”