Pervaporation separation and mass transport of ethylbutanoate solution by polyether block amide (PEBA) membranes

Pervaporative recovery of volatile aroma compounds from fruit juices

“…Thus, some authors have investigated the influence of temperature on the pervaporation process for recovery of aroma compounds. Generally, the organic permeate flux increases exponentially with feed temperature [134,140,141,143,148,151,157,161,166,167,179,183,184,186,190], in accordance with Eqs. (15) and (16).…”

“…As shown in Fig. 4, polydimethylsiloxane (PDMS) is by far the most used material in the available literature studies on aroma recovery by pervaporation [86,103,[125][126][127][128][129][130][131][132][133][134][135][137][138][139][140][141][142][143][144][145][146][149][150][151][152][153][154][155][158][159][160]162,163,167,168,[171][172][173][174][175][176][177][180][181][182][187][188]...…”

“…Depending on their segments, PEBA membranes can present different hydrophobic natures [151,167]. For example, polyethylene glycol (PEG) and polytetramethyleneglycol (PTMG) are soft segments, which provide hydrophilic and hydrophobic characters, respectively.…”

Comparative behavior of PVA/PAN and PVA/PES composite pervaporation membranes in the pervaporative dehydration of caprolactam

“…This may be due to different hydrophilic-hydrophobic properties of PES and PAN. 18 Since the thickness and the crosslinking density of the active layers of the both membranes were almost the same, one major reason for this high total flux and separation factor of the membranes with the PAN support could be that PAN was more hydrophilic than PES. Because part hydrolysis of PAN porous membrane using aqueous sodium hydroxide made some À ÀCN groups into À ÀCOOH on its surface that increased the affinity between PAN and water molecules.…”

Pervaporation performance analysis and prediction—using a hybrid solution-diffusion and pore-flow model

“…However, Lipnizki et al (2002) indicated that the overall mass transfer resistance depends on both physical and chemical properties of the supporting layer and the resistance of the supporting layer can have a significant impact on the total flux and selectivity. Recently, Jiraratananon et al (2002aJiraratananon et al ( , 2002b) used a complete model based on the solution-diffusion model for pervaporation, which utilize the resistance-in-series concept to include the mass transfer resistance of upstream feed liquid film and the vapor permeation resistance in the supporting porous membrane layer. Mass transfer mechanisms of Knudsen and continuum diffusions are considered in the supporting layer.…”