Vacuum membrane distillation for desalination of water using hollow fiber membranes

Sun, Chenggui; Kosar, Walter; Zhang, Yufeng; Feng, Xinbin

doi:10.1016/j.memsci.2013.12.055

Cited by 99 publications

(21 citation statements)

References 47 publications

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“…The final membrane prepared from the optimum condition shows a good flux of 32.3 L/m 2 -h at 60 °C feed temperature. Table 4 compares it with other VMD membranes made from various materials for seawater desalination [53][54][55][56][57][58].The newly designed membrane exhibits a superior flux owing to its unique morphology formed from a nature-mimetic surface structure. The microstructure control of MOF crystals and the hydrophobic floss growth have enabled the novel membrane for VMD applications.…”

Section: Effect Of Second Mof Growth Time On Membrane Performancementioning

confidence: 99%

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Zuo

Chung

2016

Water

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Nature-mimetic hydrophobic membranes with high wetting resistance have been designed for seawater desalination via vacuum membrane distillation (VMD) in this study. This is achieved through molecular engineering of metal-organic framework (MOF)-functionalized alumina surfaces. A two-step synthetic strategy was invented to design the hydrophobic membranes: (1) to intergrow MOF crystals on the alumina tube substrate and (2) to introduce perfluoro molecules onto the MOF functionalized membrane surface. With the first step, the surface morphology, especially the hierarchical roughness, can be controlled by tuning the MOF crystal structure. After the second step, the perfluoro molecules function as an ultrathin layer of hydrophobic floss, which lowers the surface energy. Therefore, the resultant membranes do not only possess the intrinsic advantages of alumina supports such as high stability and high water permeability, but also have a hydrophobic surface formed by MOF functionalization. The membrane prepared under an optimum condition achieved a good VMD flux of 32.3 L/m 2 -h at 60 • C. This study may open up a totally new approach for design of next-generation high performance membrane distillation membranes for seawater desalination.

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Section: Effect Of Second Mof Growth Time On Membrane Performancementioning

confidence: 99%

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Zuo

Chung

2016

Water

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“…Many countries in the world, especially those in arid areas face the problem of water shortage. To overcome the shortage of freshwater, the world today depends on desalination of seawater and brackish water [1,2]. About 18,426 desalination plants are currently in operation all over the world.…”

Section: Introductionmentioning

confidence: 99%

Application of response surface and Taguchi optimization techniques to air gap membrane distillation for water desalination—A comparative study

Khalifa

Lawal

2016

Desalination and Water Treatment

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A B S T R A C TThe performance of an air gap membrane distillation (AGMD) system for water desalination was optimized and compared using Taguchi orthogonal design arrays and the response surface methodology (RSM) Face-Centered Central Composite Design. The variables considered in the optimization are feed flow rate, feed temperature, coolant temperature, coolant flow rate, and air gap width. Additionally, a quadratic RS-model between response and the operating parameters was developed. Analysis of variance was then use to analyze the model and the significant effect of each operating parameters on flux. Results showed that the feed temperature and the air gap width are the most influential factors controlling the permeate production. The sensitivity of the permeate flux to coolant flow rate is marginal compared to other factors. From Taguchi technique, a maximum flux of 76.046 kg/m 2 h was obtained at optimum conditions. The RSM approach produced a maximum flux of 76.998 kg/m 2 h at optimum conditions. Although both techniques predicted very similar results, the RSM gives better predictions of the influence of operating parameters on response, and it is a better tool for the optimization of AGMD system compared to Taguchi methodology.

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“…The main benefits of MD technology compared to other separation processes stem from the following [13][14][15]: (1) MD can be operated at normal pressure, which makes the membrane pores not easily blocked and the membranes not easily polluted compared to the separation process driven by pressure such as the RO process; (2) MD can use low-grade energy including industrial waste heat and solar energy; and (3) MD is not restricted by salt concentration because water vapor pressure is reduced slowly as the salt concentration increases, which enables MD to treat high salt wastewater such as RO brines. MD is a promising separation technology in the 21st century which is being investigated worldwide [16]. Recent studies on MD technology focus on the MD membrane, MD module and membrane separation technology integration.…”

Section: Introductionmentioning

confidence: 99%

High water recovery of RO brine using multi-stage air gap membrane distillation

et al. 2015

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Vacuum membrane distillation for desalination of water using hollow fiber membranes

Cited by 99 publications

References 47 publications

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Application of response surface and Taguchi optimization techniques to air gap membrane distillation for water desalination—A comparative study

High water recovery of RO brine using multi-stage air gap membrane distillation

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