Evaporation of alcohol/water mixtures through hydrophobic porous membranes

Hoffmann, Edith; Pfenning, D.; Philippsen, Elke; Schwahn, P.; Sieber, M.; Wehn, R.; Woermann, D.; Wiedner, Günther

doi:10.1016/s0376-7388(00)80032-0

Cited by 48 publications

(14 citation statements)

References 7 publications

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“…In particular, VMD was also investigated as a tool for the continuous removal of ethanol from fermentation broths in order to increase the bioreactor productivity (Hofman et al, 1987;Aptel et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

Vacuum membrane distillation: Experiments and modeling

1997

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Section: Introductionmentioning

confidence: 99%

Vacuum membrane distillation: Experiments and modeling

1997

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“…VMD technology has been applied for the treatment of dilute alcohol water solutions [14,16,18,22,23,41,51].…”

Section: Treatment Of Alcohol Aqueous Solutionsmentioning

confidence: 99%

Vacuum Membrane Distillation

Khayet¹,

Matsuura²

2011

Membrane Distillation

142

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“…The contact angle measurement was usually carried out within 3-5 h of the plasma treatment. Until now, most of the contact angle measurements of membrane characterization have been made on hydrophobic membranes used for pervaporation or gas permeation, [25][26][27][28] and on porous hydrophilic or hydrophobic membrane used for Microfiltration (MF) or Ultrafiltration (UF). 29,30 Fane et al 29 correlated flux decline with variation of membrane hydrophilicity, while Oldani and Schock 30 showed that hydrophilic membranes do have better flux recoveries.…”

Section: Contact Anglementioning

confidence: 99%

Preparation of cellulose triacetate pervaporation membrane by ammonia plasma treatment

Bhat

Wavhal

2000

J. Appl. Polym. Sci.

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Homogeneous cellulose triacetate membranes were prepared by the solution-casting method. The surface of this membrane was modified with gaseous plasma of a 10-W discharge power in the presence of ammonia gas at 0.15 Torr pressure. The percentage of weight loss of the CTA membranes was found to be 0.7 for 20 min of treatment time in the ammonia plasma. The contact angle measurement indicated that hydrophilicity of the surface increases. ATR-FTIR spectral analysis showed that the hydrophilicity is mainly derived from the amino groups on the modified surface. SEM studies indicate that no considerable change of surface morphology occurred up to 5 min of treatment time, but a considerable change of surface morphology resulted for treatment of 10 and 20 min. The modified membranes were used for pervaporation studies for separation of an isopropanol-aqueous mixture. These membranes showed excellent selectivity for water. The water flux increases with an increase in treatment time for all concentrations of isopropanol in the feed. The isopropanol flux decreases for initial treatment time (2 and 5 min), but showed an increasing trend for a higher treatment time (10 and 20 min).

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Evaporation of alcohol/water mixtures through hydrophobic porous membranes

Cited by 48 publications

References 7 publications

Vacuum membrane distillation: Experiments and modeling

Vacuum membrane distillation: Experiments and modeling

Vacuum Membrane Distillation

Preparation of cellulose triacetate pervaporation membrane by ammonia plasma treatment

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