Theoretical modeling and experimental validation of transport and separation properties of carbon nanotube electrospun membrane distillation

Handle URI:
http://hdl.handle.net/10754/622098
Title:
Theoretical modeling and experimental validation of transport and separation properties of carbon nanotube electrospun membrane distillation
Authors:
Lee, Jung Gil; Lee, Eui-Jong; Jeong, Sanghyun; Guo, Jiaxin; An, Alicia Kyoungjin; Guo, Hong; Kim, Joonha; Leiknes, TorOve ( 0000-0003-4046-5622 ) ; Ghaffour, Noreddine ( 0000-0003-2095-4736 )
Abstract:
Developing a high flux and selective membrane is required to make membrane distillation (MD) a more attractive desalination process. Amongst other characteristics membrane hydrophobicity is significantly important to get high vapor transport and low wettability. In this study, a laboratory fabricated carbon nanotubes (CNTs) composite electrospun (E-CNT) membrane was tested and has showed a higher permeate flux compared to poly(vinylidene fluoride-co-hexafluoropropylene) (PH) electrospun membrane (E-PH membrane) in a direct contact MD (DCMD) configuration. Only 1% and 2% of CNTs incorporation resulted in an enhanced permeate flux with lower sensitivity to feed salinity while treating a 35 and 70 g/L NaCl solutions. Experimental results and the mechanisms of E-CNT membrane were validated by a proposed new step-modeling approach. The increased vapor transport in E-CNT membranes could not be elucidated by an enhancement of mass transfer only at a given physico-chemical properties. However, the theoretical modeling approach considering the heat and mass transfers simultaneously enabled to explain successfully the enhanced flux in the DCMD process using E-CNT membranes. This indicates that both mass and heat transfers improved by CNTs are attributed to the enhanced vapor transport in the E-CNT membrane.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)
Citation:
Lee J-G, Lee E-J, Jeong S, Guo J, An AK, et al. (2016) Theoretical modeling and experimental validation of transport and separation properties of carbon nanotube electrospun membrane distillation. Journal of Membrane Science. Available: http://dx.doi.org/10.1016/j.memsci.2016.12.045.
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
27-Dec-2016
DOI:
10.1016/j.memsci.2016.12.045
Type:
Article
ISSN:
0376-7388
Sponsors:
The research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia, and University Grants Committee of the Hong Kong for Early Career Scheme (UGC ECS/GRF Project number: 9048074).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0376738816315514
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorLee, Jung Gilen
dc.contributor.authorLee, Eui-Jongen
dc.contributor.authorJeong, Sanghyunen
dc.contributor.authorGuo, Jiaxinen
dc.contributor.authorAn, Alicia Kyoungjinen
dc.contributor.authorGuo, Hongen
dc.contributor.authorKim, Joonhaen
dc.contributor.authorLeiknes, TorOveen
dc.contributor.authorGhaffour, Noreddineen
dc.date.accessioned2016-12-29T13:20:21Z-
dc.date.available2016-12-29T13:20:21Z-
dc.date.issued2016-12-27en
dc.identifier.citationLee J-G, Lee E-J, Jeong S, Guo J, An AK, et al. (2016) Theoretical modeling and experimental validation of transport and separation properties of carbon nanotube electrospun membrane distillation. Journal of Membrane Science. Available: http://dx.doi.org/10.1016/j.memsci.2016.12.045.en
dc.identifier.issn0376-7388en
dc.identifier.doi10.1016/j.memsci.2016.12.045en
dc.identifier.urihttp://hdl.handle.net/10754/622098-
dc.description.abstractDeveloping a high flux and selective membrane is required to make membrane distillation (MD) a more attractive desalination process. Amongst other characteristics membrane hydrophobicity is significantly important to get high vapor transport and low wettability. In this study, a laboratory fabricated carbon nanotubes (CNTs) composite electrospun (E-CNT) membrane was tested and has showed a higher permeate flux compared to poly(vinylidene fluoride-co-hexafluoropropylene) (PH) electrospun membrane (E-PH membrane) in a direct contact MD (DCMD) configuration. Only 1% and 2% of CNTs incorporation resulted in an enhanced permeate flux with lower sensitivity to feed salinity while treating a 35 and 70 g/L NaCl solutions. Experimental results and the mechanisms of E-CNT membrane were validated by a proposed new step-modeling approach. The increased vapor transport in E-CNT membranes could not be elucidated by an enhancement of mass transfer only at a given physico-chemical properties. However, the theoretical modeling approach considering the heat and mass transfers simultaneously enabled to explain successfully the enhanced flux in the DCMD process using E-CNT membranes. This indicates that both mass and heat transfers improved by CNTs are attributed to the enhanced vapor transport in the E-CNT membrane.en
dc.description.sponsorshipThe research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia, and University Grants Committee of the Hong Kong for Early Career Scheme (UGC ECS/GRF Project number: 9048074).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0376738816315514en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, 27 December 2016. DOI: 10.1016/j.memsci.2016.12.045en
dc.subjectCarbon nanotubesen
dc.subjectDesalinationen
dc.subjectDirect contact membrane distillationen
dc.subjectElectrospun membraneen
dc.subjectHeat and mass transfersen
dc.titleTheoretical modeling and experimental validation of transport and separation properties of carbon nanotube electrospun membrane distillationen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalJournal of Membrane Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, Chinaen
dc.contributor.institutionDepartment of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Koreaen
kaust.authorLee, Jung Gilen
kaust.authorJeong, Sanghyunen
kaust.authorLeiknes, TorOveen
kaust.authorGhaffour, Noreddineen
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