Please use this identifier to cite or link to this item:
Title: Nanometric thin skinned dual-layer hollow fiber membranes for dehydration of isopropanol
Authors: Tang, Y.P.
Widjojo, N.
Chung, T.S. 
Weber, M.
Maletzko, C.
Keywords: Dual-layer hollow fiber membrane
Isopropanol dehydration
Positron annihilation spectroscopy
Issue Date: Aug-2013
Citation: Tang, Y.P., Widjojo, N., Chung, T.S., Weber, M., Maletzko, C. (2013-08). Nanometric thin skinned dual-layer hollow fiber membranes for dehydration of isopropanol. AIChE Journal 59 (8) : 2943-2956. ScholarBank@NUS Repository.
Abstract: A novel sulfonated polyphenylsulfone (sPPSU)/polyphenylsulfone (PPSU)-based dual-layer hollow fiber membrane with a nanometric thin skin layer has been designed for biofuel dehydration via pervaporation. The thickness of skin selective layer is in the range of 15-90 nm under different spinning conditions measured by positron annihilation spectroscopy (PAS) coupled with a mono-energetic positron beam. The effects of outer-layer dope properties, coagulation temperature, and dope flow rate during spinning were systematically investigated. By tuning these spinning parameters, a high performance sPPSU/PPSU-based dual-layer hollow fiber membrane with desirable morphology was successfully obtained. Particularly owing to its nanometric thin skin layer, a high flux of 3.47 kg/m2h with a separation factor of 156 was achieved for dehydration of an 85 wt % isopropanol aqueous solution at 50°C. After post thermal treatment at 150°C for 2 h, the separation factor was dramatically improved to 687 while flux dropped to 2.30 kg/m2h, which make it comparable to the inorganic membranes. In addition, excellent correlations were found among the results from field emission scanning electron microscopy, PAS spectra, and separation performance. © 2013 American Institute of Chemical Engineers.
Source Title: AIChE Journal
ISSN: 00011541
DOI: 10.1002/aic.14067
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on May 13, 2021


checked on May 6, 2021

Page view(s)

checked on May 3, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.