Results 251 to 260 of about 34,122 (326)
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Journal of Membrane Science, 2014
Abstract The polytetrafluoroethylene nanofiber membranes for membrane distillation were prepared by sintering the precursor electrospun polytetrafluoroethylene/polyvinyl alcohol composite membranes. The effects of sintering temperature and time on the morphology and properties of the prepared membranes were investigated.
Yongyi Yao, Yurong Wu
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Abstract The polytetrafluoroethylene nanofiber membranes for membrane distillation were prepared by sintering the precursor electrospun polytetrafluoroethylene/polyvinyl alcohol composite membranes. The effects of sintering temperature and time on the morphology and properties of the prepared membranes were investigated.
Yongyi Yao, Yurong Wu
exaly +2 more sources
Vacuum membrane distillation on a microfluidic chip
Chemical Communications, 2009A multilayered microfluidic chip used for vacuum membrane distillation is designed, fabricated and tested by rectification of a water-methanol mixture.
Yaopeng, Zhang +2 more
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Omniphobic Hollow-Fiber Membranes for Vacuum Membrane Distillation
Environmental Science & Technology, 2018Management of produced water from shale gas production is a global challenge. Vacuum membrane distillation (VMD) is considered a promising solution because of its various advantages. However, low-surface-tension species in produced water can easily deposit on the membrane surface and cause severe fouling or wetting problems.
Kang Jia Lu +4 more
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Desalination, 2018
Membrane crystallization (MCr) is emerging as an interesting candidate to extract additional freshwater and raw materials from high-concentrated solutions. Traditionally, MCr has been carried out by using polymeric membranes that have limited chemical and mechanical stability. These shortcomings can be overcome by using ceramic membranes.
CC Ko +6 more
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Membrane crystallization (MCr) is emerging as an interesting candidate to extract additional freshwater and raw materials from high-concentrated solutions. Traditionally, MCr has been carried out by using polymeric membranes that have limited chemical and mechanical stability. These shortcomings can be overcome by using ceramic membranes.
CC Ko +6 more
openaire +3 more sources
Vacuum membrane distillation by microchip with temperature gradient
Lab on a Chip, 2010A multilayered microchip (25 x 95 mm) used for vacuum distillation is designed, fabricated and tested by rectification of a water-methanol mixture. The polymer chip employs a cooling channel to generate a temperature gradient along a distillation channel below, which is separated into a channel (72 microm deep) for liquid phase and a channel (72 microm
Yaopeng, Zhang +2 more
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Studies in vacuum membrane distillation with flat membranes
Journal of Membrane Science, 2017Abstract How microporous membrane characteristics affect membrane desalination performance in vacuum membrane distillation (VMD) is of significant interest. Different microporous hydrophobic flat membranes of polyvinylidene fluoride (PVDF) and expanded polytetrafluoroethylene (ePTFE) were investigated to that end.
Lin Li, Kamalesh K. Sirkar
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Vacuum membrane distillation: Experiments and modeling
AIChE Journal, 1997AbstractVacuum membrane distillation is a membrane‐based separation process considered here to remove volatile organic compounds from aqueous streams. Microporous hydrophobic membranes are used to separate the aqueous stream from a gas phase kept under vacuum.
Serena Bandini +2 more
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Superhydrophobic modification of ceramic membranes for vacuum membrane distillation
Chinese Journal of Chemical Engineering, 2017Abstract The hydrophobically modified ceramic membranes have great potential for energy-efficient membrane distillation. In this work, flat-sheet ceramic membranes with a superhydrophobic surface were fabricated by grafting 1 H ,1 H ,2 H ,2 H -perfluorooctyltrichlorosilane or 1 H ,1 H ,2 H ,2 H -perfluorodecyltriethoxysilane and followed by ...
Yanhui Yang +6 more
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Date juice concentration by vacuum membrane distillation
Separation and Purification Technology, 2020In this work, date juices were concentrated at low temperature by Vacuum Membrane Distillation (VMD). Tests were conducted at fixed operating conditions (feed flowrate, 28 L/h; feed temperature, 28 °C; vacuum pressure, 4 mbar) on two commercial flat polypropylene membranes, different in pore size and thickness.
A Criscuoli, E Drioli
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Modeling of pore wetting in vacuum membrane distillation
Journal of Membrane Science, 2019Abstract In this work simulation results for the pore wetting of vacuum membrane distillation (VMD) are reported, considering heat and mass balance at liquid/vapor interface when steady state is achieved. Two cases were studied. In case 1, the system is in isothermal condition.
Hooman Chamani +3 more
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