Results 231 to 240 of about 1,588,055 (280)

Heat and Mass Transfer in Vacuum Membrane Distillation

International Journal of Heat and Mass Transfer, 2004
Abstract In the membrane distillation (MD) literature, the heat transfer coefficients of the boundary layers are usually estimated from well known heat transfer empirical correlations developed for non-porous and rigid heat exchangers. A difference between the mechanism of heat transfer in MD systems, which is coupled with transmembrane mass transfer,
Mohamed Khayet, J I Mengual
exaly   +3 more sources

Date juice concentration by vacuum membrane distillation

Separation and Purification Technology, 2020
In 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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Treatment of Dye Solutions by Vacuum Membrane Distillation

Water Research, 2008
In this work, the vacuum membrane distillation (VMD) process has been applied to treat water containing different types of dyes. The influence of operating parameters, as feed temperature, feed flow rate, feed concentration, on the permeate flux and on rejection has been investigated.
Alberto Figoli, Alessandra Criscuoli, Enrico Drioli   +2 more
exaly   +5 more sources

Membrane Distillation. I. Module Design and Performance Evaluation Using Vacuum Membrane Distillation

Journal of Membrane Science, 1996
Pure water vacuum membrane distillation (VMD) experiments were performed to evaluate the heat and mass transfer boundary layer resistances in a new laboratory-scale membrane module. The membrane module designed for this work is unique in that it can use flat-sheet membranes without a support.
Douglas R Lloyd
exaly   +2 more sources

Separation Efficiency in Vacuum Membrane Distillation

Journal of Membrane Science, 1992
Abstract Vacuum membrane distillation has been analyzed as a separation process for aqueous mixtures. The total permeate flux obtained is affected by two simultaneous resistances, those due to the heat and mass transfer processes which take place through the liquid phase and through the membrane respectively.
C Gostoli, G C Sarti
exaly   +2 more sources

Studies in Vacuum Membrane Distillation With Flat Membranes

Journal of Membrane Science, 2017
Abstract 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
exaly   +2 more sources

Concentration of must through vacuum membrane distillation

Desalination, 2002
Vacuum Membrane Distillation is studied for the concentration of fruit juices up to 50°Brix. The fluxes of water and of the relevant aroma compounds are experimentally examined for a typical must, as a function of temperature, sugar content and downstream pressure. The process leads to juice concentrates still retaining interesting amounts of the aroma
Bandini S., Sarti G. C.
openaire   +2 more sources

Effect of Microwave Irradiation on Vacuum Membrane Distillation

Journal of Membrane Science, 2013
Abstract In this paper, a vacuum membrane distillation (VMD) system equipped with a microwave source was designed. And the polyvinylidene fluoride (PVDF) hollow fiber hydrophobic membranes were selected to carry out microwave vacuum membrane distillation (MWVMD).
Jun Wang, Zhaokun Luan
exaly   +2 more sources