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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

31 Scopus Citations
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Author(s)

  • Jung-Gil Lee
  • Eui-Jong Lee
  • Sanghyun Jeong
  • Hong Guo
  • Joonha Kim
  • TorOve Leiknes
  • Noreddine Ghaffour

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)395-408
Journal / PublicationJournal of Membrane Science
Volume526
Online published27 Dec 2016
Publication statusPublished - 15 Mar 2017

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.

Research Area(s)

  • Carbon nanotubes, Desalination, Direct contact membrane distillation, Electrospun membrane, Heat and mass transfers

Citation Format(s)

Theoretical modeling and experimental validation of transport and separation properties of carbon nanotube electrospun membrane distillation. / Lee, Jung-Gil; Lee, Eui-Jong; Jeong, Sanghyun; Guo, Jiaxin; An, Alicia Kyoungjin; Guo, Hong; Kim, Joonha; Leiknes, TorOve; Ghaffour, Noreddine.

In: Journal of Membrane Science, Vol. 526, 15.03.2017, p. 395-408.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal