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Effects of air gap on membrane substrate properties and membrane performance for biomass processing

Elfira, Anuar and Syed Mohd Saufi, Tuan Chik and Hafizuddin, Wan Yussof (2019) Effects of air gap on membrane substrate properties and membrane performance for biomass processing. Korean Journal of Chemical Engineering, 36 (7). pp. 1124-1130. ISSN 0256-1115 (Print); 1975-7220 (Online)

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Abstract

In this study, a correlation between the membrane substrate properties and the final performance of hollow fiber thin film composite (TFC) membrane for xylose/glucose concentration and acetic acid removal was studied. Polysulfone (PSf) hollow fiber membrane substrate was fabricated using 20 wt% PSf, 2 wt% polyvinylpyrrolidone and 78 wt% dimethylformamide via dry-wet spinning process. The air gap distance was manipulated from 6 cm to 15 cm during spinning in order to produce different substrate membrane properties. The molecular weight cut-off (MWCO) and porosity of the membrane substrate increased as the air gap distance increased. Membrane substrate that was spun at 6 cm air gap showed a rapid phase inversion without much chain relaxation, thus producing the smallest MWCO (8 kDa) and an average pore diameter (4.46 nm). The TFC membrane produced using this membrane substrate showed the best performance in terms of solute rejection and separation factor. The rejection for xylose, glucose and acetic acid were 91.66 ± 0.09%, 67.28 ± 13.97%, and 13.08 ± 3.00%, respectively. This results in ideal separation factor of 3.20 ± 1.27 for acetic acid/glucose and 10.42 ± 0.25 for acetic acid/xylose.

Item Type: Article
Uncontrolled Keywords: Biorefinery; Sugar separation; Hollow fiber; Air gap; Thin Film Composite Membrane
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Dr Syed Mohd Saufi Tuan Chik
Date Deposited: 16 Aug 2019 03:00
Last Modified: 16 Aug 2019 03:00
URI: http://umpir.ump.edu.my/id/eprint/24862
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