Pervaporative separation of bioethanol using a polydimethylsiloxane/polyetherimide composite hollow-fiber membrane.
Pervaporation is one of the most promising separation processes for the purification of ethanol. In this study, a composite hollow-fiber membrane with a thin polydimethylsiloxane (PDMS) active layer on a polyetherimide (PEI) macroporous support was used for pervaporative separation of ethanol produced by Saccharomyces cerevisiae from glucose fermentation broth. The pervaporation performance for ethanol/water binary mixtures was strongly dependent on the feed concentration and operating temperature for ethanol concentrations of 1-10%. The composite hollow-fiber membrane was stable over the long-term (about 160 days) with an ethanol permeation flux of 60-62 g/m(2)h and a separation factor of 7-9. In comparison with published results for PDMS composite membranes, the PDMS/PEI hollow-fiber composite membrane had relatively good pervaporation performance with a total flux of 231-252 g/m(2)h.
Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
Hong-Joo
HJ
Lee
Eun Jin
EJ
Cho
Young-Gyu
YG
Kim
In Seong
IS
Choi
Hyeun-Jong
HJ
Bae
D056804:Biofuels / Q000032:analysis*; D001709:Biotechnology / Q000379:methods*; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D000431:Ethanol / Q000302:isolation & purification*; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014835:Volatilization; D014867:Water / Q000737:chemistry
D056804:Biofuels; D004129:Dimethylpolysiloxanes; D008567:Membranes, Artificial; D011108:Polymers; C433673:polyetherimide; D014867:Water; D000431:Ethanol; D005947:Glucose