High-flux POMS organophilic pervaporation for ABE recovery applied in fed-batch and continuous set-ups

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논문

High-flux POMS organophilic pervaporation for ABE recovery applied in fed-batch and continuous set-ups

학술지

Journal of membrane science

저자명

Van Hecke, Wouter; De Wever, Heleen

초록

Abstract The performance of fed-batch and continuous ABE fermentations integrated with organophilic pervaporation was thoroughly tested. Poly(octyl methyl siloxane) (POMS) based pervaporation membranes were applied during fermentation and compared to the performance of polydimethylsiloxane (PDMS) based membranes. The performance of POMS based pervaporation membranes was superior both in terms of flux, separation factor and pervaporation separation index. Depending on the solvent concentration in the fermentor, total fluxes (measured during the fermentation) varied from 0.871 to 1.392kgm−2 h−1 for the POMS (obtained at 20 mbar) and 0.564–0.719kgm−2 h−1 for the PDMS based membrane (obtained at 9–14 mbar). Initially, simulated lignocellulosic hydrolyzates were used as a feedstock followed by the use of wheat straw hydrolyzate. Close to complete xylose conversion could only be obtained at relatively low solvent productivities. The effect of vacuum pressure (20–50 mbar) on flux and separation factor was investigated during fermentations using wheat straw hydrolyzates as feedstocks. Highlights <UL> <LI> Continuous configuration was superior in comparison to fed-batch configuration. </LI> <LI> Solvent fluxes and PSI were higher for POMS in comparison to PDMS. </LI> <LI> Lower solvent and water fluxes are obtained at higher permeate pressures. </LI> <LI> Formation of non-condensable gases should be taken into account. </LI> </UL>

발행연도

2017

발행기관

Elsevier

라이선스

cc-by

ISSN

0376-7388

ISSN

1873-3123

권

540