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Increasing the Performance of Vacuum Membrane Distillation Using Micro-Structured Hydrophobic Aluminum Hollow Fiber Membranes

Increasing the Performance of Vacuum Membrane Distillation Using Micro-Structured Hydrophobic Aluminum Hollow Fiber Membranes

Authors :
Chia-Chieh Ko
Chien-Hua Chen
Yi-Rui Chen
Yu-Hsun Wu
Soon-Chien Lu
Fa-Chun Hu
Chia-Ling Li
Kuo-Lun Tung
Source :
Applied Sciences, Vol 7, Iss 4, p 357 (2017)
Publication Year :
2017
Publisher :
MDPI AG, 2017.

Abstract

This study develops a micro-structured hydrophobic alumina hollow fiber with a high permeate flux of 60 Lm−2h−1 and salt rejection over 99.9% in a vacuum membrane distillation process. The fiber is fabricated by phase inversion and sintering, and then modified with fluoroalkylsilanes to render it hydrophobic. The influence of the sintering temperature and feeding temperature in membrane distillation (MD) on the characteristics of the fiber and MD performance are investigated. The vacuum membrane distillation uses 3.5 wt % NaCl aqueous solution at 70 °C at 0.03 bar. The permeate flux of 60 Lm−2h−1 is the highest, compared with reported data and is higher than that for polymeric hollow fiber membranes.

Details

Language :
English
ISSN :
20763417
Volume :
7
Issue :
4
Database :
Directory of Open Access Journals
Journal :
Applied Sciences
Publication Type :
Academic Journal
Accession number :
edsdoj.5a812b69255f498c913eb36aafccd171
Document Type :
article
Full Text :
https://doi.org/10.3390/app7040357