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Flux decline along the flow channel in tubular ultrafiltration modules

Nordin, Anna-Karin LU and Jönsson, Ann-Sofi LU (2009) In Chemical Engineering Research & Design 87(11A). p.1551-1561
Abstract
Modelling of the ultrafiltration process is crucial for effective optimization of full-scale modules, and considerable effort has been devoted to describing the permeate flux during ultrafiltration. Many models use a detailed description of the mass transport and are thus valuable for the understanding of the fundamental mechanisms of ultrafiltration. However, for the prediction of the flux in multi-component solutions, the complexity of these models is a drawback. In industrial applications, the process streams are often complex mixtures of several components. This calls for a combination of experiments and calculations instead of a strictly theoretical approach. In the work presented here, a method combining parametric studies and... (More)
Modelling of the ultrafiltration process is crucial for effective optimization of full-scale modules, and considerable effort has been devoted to describing the permeate flux during ultrafiltration. Many models use a detailed description of the mass transport and are thus valuable for the understanding of the fundamental mechanisms of ultrafiltration. However, for the prediction of the flux in multi-component solutions, the complexity of these models is a drawback. In industrial applications, the process streams are often complex mixtures of several components. This calls for a combination of experiments and calculations instead of a strictly theoretical approach. In the work presented here, a method combining parametric studies and simulations has been used. The method is general due to its empirical nature, and its versatility has been demonstrated by applying it to three feed solutions with different filtration characteristics: bleach plant effluent with flux dependent on both transmembrane pressure and cross-flow velocity, concentrated bleach plant effluent with flux dependent on transmembrane pressure, but independent of cross-flow velocity and a colloidal silica solution with flux independent of transmembrane pressure but dependent on cross-flow velocity. Tubular polymeric membranes have been used, and both laminar and turbulent flow conditions have been investigated. It was shown that it exist an optimal cross-flow velocity when treating solutions with flux dependent on transmembrane pressure. The optimal velocity depends on the frictional pressure drop, which is a function of solution viscosity and module configuration. (C) 2009 The Institution of Chemical Engineers. Published by Elsevier BY. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bleach plant effluent, membranes, Tubular, Flux prediction, Ultrafiltration, Multi-component solutions
in
Chemical Engineering Research & Design
volume
87
issue
11A
pages
1551 - 1561
publisher
IChemE
external identifiers
  • wos:000271823500011
  • scopus:74249096575
ISSN
0263-8762
DOI
10.1016/j.cherd.2009.04.002
language
English
LU publication?
yes
id
4fcf9c32-8cfe-42e2-a90f-40c70f688de6 (old id 1519553)
date added to LUP
2009-12-28 12:26:31
date last changed
2017-01-01 05:55:48
@article{4fcf9c32-8cfe-42e2-a90f-40c70f688de6,
  abstract     = {Modelling of the ultrafiltration process is crucial for effective optimization of full-scale modules, and considerable effort has been devoted to describing the permeate flux during ultrafiltration. Many models use a detailed description of the mass transport and are thus valuable for the understanding of the fundamental mechanisms of ultrafiltration. However, for the prediction of the flux in multi-component solutions, the complexity of these models is a drawback. In industrial applications, the process streams are often complex mixtures of several components. This calls for a combination of experiments and calculations instead of a strictly theoretical approach. In the work presented here, a method combining parametric studies and simulations has been used. The method is general due to its empirical nature, and its versatility has been demonstrated by applying it to three feed solutions with different filtration characteristics: bleach plant effluent with flux dependent on both transmembrane pressure and cross-flow velocity, concentrated bleach plant effluent with flux dependent on transmembrane pressure, but independent of cross-flow velocity and a colloidal silica solution with flux independent of transmembrane pressure but dependent on cross-flow velocity. Tubular polymeric membranes have been used, and both laminar and turbulent flow conditions have been investigated. It was shown that it exist an optimal cross-flow velocity when treating solutions with flux dependent on transmembrane pressure. The optimal velocity depends on the frictional pressure drop, which is a function of solution viscosity and module configuration. (C) 2009 The Institution of Chemical Engineers. Published by Elsevier BY. All rights reserved.},
  author       = {Nordin, Anna-Karin and Jönsson, Ann-Sofi},
  issn         = {0263-8762},
  keyword      = {Bleach plant effluent,membranes,Tubular,Flux prediction,Ultrafiltration,Multi-component solutions},
  language     = {eng},
  number       = {11A},
  pages        = {1551--1561},
  publisher    = {IChemE},
  series       = {Chemical Engineering Research & Design},
  title        = {Flux decline along the flow channel in tubular ultrafiltration modules},
  url          = {http://dx.doi.org/10.1016/j.cherd.2009.04.002},
  volume       = {87},
  year         = {2009},
}