Modelling of cross-flow membrane contactors: physical mass transfer processes

V.Y. Dindore, Derk Willem Frederik Brilman, Geert Versteeg

  • 31 Citations

Abstract

Traditionally, hollow fiber membrane contactors used for gas–liquid contacting were designed in a shell and tube configuration with shell-side fluid flowing parallel to the fiber-side fluid, either in co-current or counter-current pattern. The primary limitations of these so-called ‘parallel flow’ contactors are the shell-side flow channeling or mal-distribution due to non-uniform packing of the hollow fibers, higher shell-side pressure drop and relatively lower mass transfer coefficients. These limitations can be eliminated or reduced substantially by placing hollow fibers perpendicular to the flow direction. In these cross-flow membrane contactors the concentrations of both fluids vary in both directions i.e. in the direction of the flow as well as in the direction perpendicular to the flow. Hence, unlike parallel flow contactors, simple logarithmic averaging of the concentration driving force cannot be used to predict performance of the cross-flow membrane contactors. Similar changes in the driving force are also found in the cross-flow shell and tube heat exchanger. An analytical expression based on heat transfer analogy is derived in this work to describe the mass transfer in these hollow fiber cross-flow contactors. However, it was found that when the change in the volumetric flow of the compressible fluid is significant heat transfer analogy cannot be used to predict the performance of the cross-flow gas–liquid membrane contactor. Therefore, a detailed numerical model is developed to analyze the performance of the cross-flow membrane contactor in such cases. The model takes into account the shell-side mixing, change in concentration driving force in all direction as well as cascading two or more cross-flow modules to give overall co- or counter-current flow arrangement. To validate the model and developed analytical expression, carbon dioxide absorption experiments were carried out in cross-flow membrane contactor using water as a solvent. The predictions of the developed numerical model were found to be in good agreement with the experimental results.
Original languageUndefined
Pages (from-to)209-222
Number of pages24
JournalJournal of membrane science
Volume251
Issue number1-2
DOIs
StatePublished - 2005

Fingerprint

Membranes
Fibers
Fluids
Hot Temperature
Parallel flow
Numerical models
Mass transfer
Heat transfer
Gases
Liquid membranes
Tubes (components)
Pressure drop
Carbon dioxide
Liquids
Water
Experiments
Carbon Dioxide

Keywords

  • IR-78214
  • Cross-flow
  • Modelling
  • CO2 absorption
  • Hollow fiber membranes
  • METIS-226420
  • Membrane contactors

Cite this

Dindore, V.Y.; Brilman, Derk Willem Frederik; Versteeg, Geert / Modelling of cross-flow membrane contactors: physical mass transfer processes.

In: Journal of membrane science, Vol. 251, No. 1-2, 2005, p. 209-222.

Research output: Scientific - peer-reviewArticle

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title = "Modelling of cross-flow membrane contactors: physical mass transfer processes",
abstract = "Traditionally, hollow fiber membrane contactors used for gas–liquid contacting were designed in a shell and tube configuration with shell-side fluid flowing parallel to the fiber-side fluid, either in co-current or counter-current pattern. The primary limitations of these so-called ‘parallel flow’ contactors are the shell-side flow channeling or mal-distribution due to non-uniform packing of the hollow fibers, higher shell-side pressure drop and relatively lower mass transfer coefficients. These limitations can be eliminated or reduced substantially by placing hollow fibers perpendicular to the flow direction. In these cross-flow membrane contactors the concentrations of both fluids vary in both directions i.e. in the direction of the flow as well as in the direction perpendicular to the flow. Hence, unlike parallel flow contactors, simple logarithmic averaging of the concentration driving force cannot be used to predict performance of the cross-flow membrane contactors. Similar changes in the driving force are also found in the cross-flow shell and tube heat exchanger. An analytical expression based on heat transfer analogy is derived in this work to describe the mass transfer in these hollow fiber cross-flow contactors. However, it was found that when the change in the volumetric flow of the compressible fluid is significant heat transfer analogy cannot be used to predict the performance of the cross-flow gas–liquid membrane contactor. Therefore, a detailed numerical model is developed to analyze the performance of the cross-flow membrane contactor in such cases. The model takes into account the shell-side mixing, change in concentration driving force in all direction as well as cascading two or more cross-flow modules to give overall co- or counter-current flow arrangement. To validate the model and developed analytical expression, carbon dioxide absorption experiments were carried out in cross-flow membrane contactor using water as a solvent. The predictions of the developed numerical model were found to be in good agreement with the experimental results.",
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author = "V.Y. Dindore and Brilman, {Derk Willem Frederik} and Geert Versteeg",
year = "2005",
doi = "10.1016/j.memsci.2004.11.017",
volume = "251",
pages = "209--222",
journal = "Journal of membrane science",
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Modelling of cross-flow membrane contactors: physical mass transfer processes. / Dindore, V.Y.; Brilman, Derk Willem Frederik; Versteeg, Geert.

In: Journal of membrane science, Vol. 251, No. 1-2, 2005, p. 209-222.

Research output: Scientific - peer-reviewArticle

TY - JOUR

T1 - Modelling of cross-flow membrane contactors: physical mass transfer processes

AU - Dindore,V.Y.

AU - Brilman,Derk Willem Frederik

AU - Versteeg,Geert

PY - 2005

Y1 - 2005

N2 - Traditionally, hollow fiber membrane contactors used for gas–liquid contacting were designed in a shell and tube configuration with shell-side fluid flowing parallel to the fiber-side fluid, either in co-current or counter-current pattern. The primary limitations of these so-called ‘parallel flow’ contactors are the shell-side flow channeling or mal-distribution due to non-uniform packing of the hollow fibers, higher shell-side pressure drop and relatively lower mass transfer coefficients. These limitations can be eliminated or reduced substantially by placing hollow fibers perpendicular to the flow direction. In these cross-flow membrane contactors the concentrations of both fluids vary in both directions i.e. in the direction of the flow as well as in the direction perpendicular to the flow. Hence, unlike parallel flow contactors, simple logarithmic averaging of the concentration driving force cannot be used to predict performance of the cross-flow membrane contactors. Similar changes in the driving force are also found in the cross-flow shell and tube heat exchanger. An analytical expression based on heat transfer analogy is derived in this work to describe the mass transfer in these hollow fiber cross-flow contactors. However, it was found that when the change in the volumetric flow of the compressible fluid is significant heat transfer analogy cannot be used to predict the performance of the cross-flow gas–liquid membrane contactor. Therefore, a detailed numerical model is developed to analyze the performance of the cross-flow membrane contactor in such cases. The model takes into account the shell-side mixing, change in concentration driving force in all direction as well as cascading two or more cross-flow modules to give overall co- or counter-current flow arrangement. To validate the model and developed analytical expression, carbon dioxide absorption experiments were carried out in cross-flow membrane contactor using water as a solvent. The predictions of the developed numerical model were found to be in good agreement with the experimental results.

AB - Traditionally, hollow fiber membrane contactors used for gas–liquid contacting were designed in a shell and tube configuration with shell-side fluid flowing parallel to the fiber-side fluid, either in co-current or counter-current pattern. The primary limitations of these so-called ‘parallel flow’ contactors are the shell-side flow channeling or mal-distribution due to non-uniform packing of the hollow fibers, higher shell-side pressure drop and relatively lower mass transfer coefficients. These limitations can be eliminated or reduced substantially by placing hollow fibers perpendicular to the flow direction. In these cross-flow membrane contactors the concentrations of both fluids vary in both directions i.e. in the direction of the flow as well as in the direction perpendicular to the flow. Hence, unlike parallel flow contactors, simple logarithmic averaging of the concentration driving force cannot be used to predict performance of the cross-flow membrane contactors. Similar changes in the driving force are also found in the cross-flow shell and tube heat exchanger. An analytical expression based on heat transfer analogy is derived in this work to describe the mass transfer in these hollow fiber cross-flow contactors. However, it was found that when the change in the volumetric flow of the compressible fluid is significant heat transfer analogy cannot be used to predict the performance of the cross-flow gas–liquid membrane contactor. Therefore, a detailed numerical model is developed to analyze the performance of the cross-flow membrane contactor in such cases. The model takes into account the shell-side mixing, change in concentration driving force in all direction as well as cascading two or more cross-flow modules to give overall co- or counter-current flow arrangement. To validate the model and developed analytical expression, carbon dioxide absorption experiments were carried out in cross-flow membrane contactor using water as a solvent. The predictions of the developed numerical model were found to be in good agreement with the experimental results.

KW - IR-78214

KW - Cross-flow

KW - Modelling

KW - CO2 absorption

KW - Hollow fiber membranes

KW - METIS-226420

KW - Membrane contactors

U2 - 10.1016/j.memsci.2004.11.017

DO - 10.1016/j.memsci.2004.11.017

M3 - Article

VL - 251

SP - 209

EP - 222

JO - Journal of membrane science

T2 - Journal of membrane science

JF - Journal of membrane science

SN - 0376-7388

IS - 1-2

ER -