RT Journal Article
T1 Factors affecting flux and ethanol separation performance in vacuum membrane distillation (VMD)
A1 Izquierdo Gil, María Amparo
A1 Jonsson, G.
AB Membrane distillation (MD) has a great potential as a concentration process for temperature labile liquids such as fruit juices, etc. Besides water, also aroma compounds will permeate through the membrane depending on their volatility and how the MD process is operated on the permeate side.In this paper, an experimental and theoretical investigation of the influence of concentration polarisation and temperature polarisation on the flux and selectivity of binary aqueous mixtures of ethanol is presented for vacuum membrane distillation (VMD) processes. Experimental results include changes of the following parameters: nature of solutions, membrane material and pore size, feed temperature, recirculation flow rate. One method was proposed in order to evaluate the concentration polarisation effects from the fit of the experimental data. General models taking into account Knudsen and viscous flows were proposed, but viscous contribution resulted to be negligible under our operating conditions. Therefore, theoretical fluxes were estimated using Knudsen model and a good agreement between them and the experimental ones was found.
PB Elsevier Science BV
SN 0376-7388
YR 2003
FD 2003-03-15
LK https://hdl.handle.net/20.500.14352/51033
UL https://hdl.handle.net/20.500.14352/51033
LA eng
NO © 2002 Elsevier Science B.V. Postdoctoral grant from Universidad Complutense of Madrid by M.A. Izquierdo Gil and support from the Danish Directorate for Development are gratefully acknowledged.
NO Danish Directorate for Development
DS Docta Complutense
RD 8 abr 2025