Academic Journal
Synthesis of polybenzimidazole (PBI) forward osmosis (FO) membrane and computational fluid dynamics (CFD) modeling of concentration gradient across membrane surface
| Title: | Synthesis of polybenzimidazole (PBI) forward osmosis (FO) membrane and computational fluid dynamics (CFD) modeling of concentration gradient across membrane surface |
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| Authors: | Akther N, Daer S, Wei Q, Janajreh I, Hasan SW |
| Publisher Information: | ELSEVIER SCIENCE BV |
| Publication Year: | 2020 |
| Collection: | University of Technology Sydney: OPUS - Open Publications of UTS Scholars |
| Subject Terms: | 03 Chemical Sciences, 09 Engineering, Chemical Engineering |
| Description: | © 2018 Elsevier B.V. The aim of this research study was to synthesize and characterize asymmetric polybenzimidazole (PBI) FO flat sheet membranes for seawater desalination applications in high temperature and high salinity regions such as in Abu Dhabi (UAE). The membrane fabrication conditions that were considered during phase inversion method were membrane casting thickness, oven temperature and duration. The impact of draw and feed solution flow rates, draw solution type and concentration were also investigated. Results showed 2 M MgCl2 reported the highest water flux and salt rejection of 3.1 ± 0.2 LMH and 97.4 ± 1.3% when compared to NaCl and KBr (i.e. 2.6 ± 0.1 LMH and 96.9 ± 1.3%, and 2.3 ± 0.3 LMH and 95.9 ± 1.3%, respectively). Additionally, computational fluid dynamics (CFD) modeling was used to verify the experimental results and study the impact of concentration gradient across membrane film on water flux and salt rejection at different FO cell orientations. The water flux and salt rejection with 2 M MgCl2 draw solution increased from 3.6 ± 0.1 to 21.3 ± 0.2 LMH and 89.5 ± 1.2% to 96.3 ± 1.2%, respectively when the draw solution was allowed to flow in the top compartment of the membrane cell (orientation B). CFD modeling results demonstrated that solution density, gravity and diffusion rate affected FO performance at low cross-flow velocity. |
| Document Type: | article in journal/newspaper |
| File Description: | application/pdf |
| Language: | English |
| ISSN: | 0011-9164 1873-4464 |
| Relation: | Desalination; Desalination, 2019, 452, pp. 17-28; http://hdl.handle.net/10453/143907 |
| Availability: | http://hdl.handle.net/10453/143907 |
| Rights: | info:eu-repo/semantics/restrictedAccess |
| Accession Number: | edsbas.F659B4A8 |
| Database: | BASE |
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