Performance of Commercial and Laboratory Membranes for Recovering Bioethanol from Fermentation Broth by Thermopervaporation

A poly[1-(trimethylsilyl)-1-propyne] membrane was studied in a thermopervaporation process for ethanol recovery from fermentation media. Four commercial composite membranes based on polysiloxanes (Pervap 4060, Pervatech PDMS, PolyAn, and MDK-3) were studied for comparison. The dependences of the per...

Full description

Saved in:
Bibliographic Details
Published inRussian journal of applied chemistry Vol. 91; no. 8; pp. 1375 - 1381
Main Authors Golubev, G. S., Borisov, I. L., Volkov, V. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.08.2018
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Ethanol
Fermentation
Industrial Chemistry/Chemical Engineering
Membranes
Pervaporation
Polydimethylsiloxane
Polysiloxanes
Recovering
Selectivity
Separation
Silicone resins
Special Technological Solutions
fermentation mixtures
thermopervaporation
ethanol
polysiloxanes
poly[1-(trimethylsilyl)-1-propyne]
Online AccessGet full text

Cover

More Information
Summary:A poly[1-(trimethylsilyl)-1-propyne] membrane was studied in a thermopervaporation process for ethanol recovery from fermentation media. Four commercial composite membranes based on polysiloxanes (Pervap 4060, Pervatech PDMS, PolyAn, and MDK-3) were studied for comparison. The dependences of the permeate flux, permeate concentration, separation factor, and pervaporation separation index on the temperature of the feed mixture (5 wt % ethanol in water) were obtained. The maximal values of the ethanol concentration in the permeate (35 wt %) and separation factor (10.2) were obtained for the poly[1-(trimethylsilyl)-1-propyne] membrane, whereas the PolyAn membrane provided the highest permeate flux (5.4 kg m –2 h –1 ). The ethanol/ water separation factor for the systems studied has a maximum at 60°С; this temperature of the feed mixture is optimum for recovering ethanol from aqueous media by thermopervaporation. The existing membranes based on polysiloxanes show low ethanol–water selectivity (less than 1). Poly[1-(trimethylsilyl)-1-propyne] membranes are the most promising for recovering bioethanol from fermentation mixtures by thermopervaporation, because they showed the highest selectivity to ethanol.
ISSN:1070-4272
1608-3296
DOI:10.1134/S1070427218080177