Pervaporation of isomeric butanols

Recovery of aroma compounds from model solution by pervaporation membrane

“…The separation factor which describes the efficiency of the process varied in different ranges for different compounds (Table 3) as ethanol had 3-10 times higher values than n-butanol. Usually ethanol separation factor is lower (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) in case of pervaporation [3]. The increased separation factor for ethanol can be explained by the presence of other compounds which as a coupling effect can modify the diffusivity as if they were alone [8].…”

Capillary supported ultrathin homogeneous silicalite-poly(dimethylsiloxane) nanocomposite membrane for bio-butanol recovery

“…The silicalite-PDMS membrane reported by Huang [9] possesses the highest separation factor. Ge-ZSM-5 [28], PTMSP [11,12], surface modified poly(vinylidene difluoride) (PVDF) [29], PERVAP-1070 [9], PDMS [7,9,15], poly(urethane) (PUR) [7], PEBA [7] membranes have also been reported for pervaporation separation of butanol-water mixtures. According to the economic appraisal by Vane [3], when butanol-water separation factor is larger than 30, the energy required for pervaporation of butanol will be less than that of distillation.…”

“…The most intensively studied materials include poly(dimethylsiloxane) (PDMS) [7][8][9][10], poly(1-trimethylsilyl-1-propyne) (PTMSP) [11,12], and poly(etherblock-amide) (PEBA) [2,13]. PDMS is an "organic-inorganic" elastomeric material, often referred to as "silicone rubber", exhibiting excellent film-forming ability, thermal stability, chemical and physiological inertness [14].…”

“…The reported butanol-water separation factors for PDMS membranes generally ranged from 15 to 50. However, the total fluxes of these dense PDMS membranes are normally less than 1.0 kg m −2 h −1 [7,9,15]. Reducing membrane thickness can increase the membrane flux proportionally.…”

Fabrication of PEBA/Cu2O mixed-matrix membranes and their application in pyridine recovery from aqueous solution

“…These features are benecial for the industrial application of PEBA membranes. Boddeker 29 carried out a comparative study on pervaporation separation of four isomeric butanols through PEBA membranes. They found that the permeation ux of PEBA membrane was higher than that of PDMS and polyether-based polyurethane membranes.…”