Mass transport in hydrophobic pervaporation: A model design tool kit based on the resistance-in-series model
Field, Robert W. ; Hausmanns, Stephan ; Lipnizki, Frank LU
and Laufenberg, Günther
(1999)
Euromembrane 1999
p.213-214
- Abstract
- Over the years several models have been developed to describe hydrophobic pervaporation. The different approaches can be generally classified as process-orientated or membrane-orientated. Among these models the resistance-in-series model (RSM) has a unique position since it combines process conditions with membrane parameters. The aim of this work is to demonstrate the extension of the RSM to cover (1) coupling, (2) fouling of the membrane and (3) the influence of sorption and desorption coefficients. Further, to introduce a simplified approach to model PDMS-zeolithe membranes based on the resistance-in-series model. The different extensions to the RSM are integrated into a model tool kit based on the decision tree approach to build... (More)
- Over the years several models have been developed to describe hydrophobic pervaporation. The different approaches can be generally classified as process-orientated or membrane-orientated. Among these models the resistance-in-series model (RSM) has a unique position since it combines process conditions with membrane parameters. The aim of this work is to demonstrate the extension of the RSM to cover (1) coupling, (2) fouling of the membrane and (3) the influence of sorption and desorption coefficients. Further, to introduce a simplified approach to model PDMS-zeolithe membranes based on the resistance-in-series model. The different extensions to the RSM are integrated into a model tool kit based on the decision tree approach to build application-orientated models.
Recent studies revealed that fouling, coupling and the influence of sorption and desorption coefficients can have a significant influence on the performance of pervaporation – fluxes and selectivity. The effect of coupling has been modelled by introducing a coupling factor accounting for the difference of component permeabilities between binary and ternary systems as function of feed concentrations. From the experiments with impermeable component it was observed that the permeability of the components changed significantly. Two different modes of fouling of dense membranes have been identified and modelled: (1) surface blocking and (2) particle blocking. Difference between sorption and desorption coefficient has been identified as a potential resistance of the mass transport. In this work the effect is introduced into the RSM as an apparent increase in membrane thickness. Finally a simplified approach two model PDMS-zeolithe membrane has been developed based on the RSM. In this approach the fluxes through the zeolithe and PDMS are analysed independently and the flux through the membrane is described as the sum of transmembrane fluxes of the components through the two materials. Introducing these extension the applicability range of the RSM has been significantly increased. In order to develop application-orientated RSMs, without unnecessary complexity, these extensions have been integrated into a decision approach as foundation for simulation program which allows the user to develop suitable RSMs based on the requirements of specific applications.
(Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/363349d1-d104-4ee0-8989-ee2a7ff77e99
- author
- Field, Robert W.
; Hausmanns, Stephan
; Lipnizki, Frank
LU
and Laufenberg, Günther
- publishing date
- 1999-09-19
- type
- Contribution to conference
- publication status
- published
- subject
- keywords
- Membranes, Pervaporation, Modelling
- pages
- 2 pages
- conference name
- Euromembrane 1999
- conference location
- Leuven, Belgium
- conference dates
- 1999-09-19 - 1999-09-23
- language
- English
- LU publication?
- no
- id
- 363349d1-d104-4ee0-8989-ee2a7ff77e99
- date added to LUP
- 2019-05-23 07:37:06
- date last changed
- 2020-10-24 02:19:59
@misc{363349d1-d104-4ee0-8989-ee2a7ff77e99,
abstract = {{Over the years several models have been developed to describe hydrophobic pervaporation. The different approaches can be generally classified as process-orientated or membrane-orientated. Among these models the resistance-in-series model (RSM) has a unique position since it combines process conditions with membrane parameters. The aim of this work is to demonstrate the extension of the RSM to cover (1) coupling, (2) fouling of the membrane and (3) the influence of sorption and desorption coefficients. Further, to introduce a simplified approach to model PDMS-zeolithe membranes based on the resistance-in-series model. The different extensions to the RSM are integrated into a model tool kit based on the decision tree approach to build application-orientated models.<br/><br/>Recent studies revealed that fouling, coupling and the influence of sorption and desorption coefficients can have a significant influence on the performance of pervaporation – fluxes and selectivity. The effect of coupling has been modelled by introducing a coupling factor accounting for the difference of component permeabilities between binary and ternary systems as function of feed concentrations. From the experiments with impermeable component it was observed that the permeability of the components changed significantly. Two different modes of fouling of dense membranes have been identified and modelled: (1) surface blocking and (2) particle blocking. Difference between sorption and desorption coefficient has been identified as a potential resistance of the mass transport. In this work the effect is introduced into the RSM as an apparent increase in membrane thickness. Finally a simplified approach two model PDMS-zeolithe membrane has been developed based on the RSM. In this approach the fluxes through the zeolithe and PDMS are analysed independently and the flux through the membrane is described as the sum of transmembrane fluxes of the components through the two materials. Introducing these extension the applicability range of the RSM has been significantly increased. In order to develop application-orientated RSMs, without unnecessary complexity, these extensions have been integrated into a decision approach as foundation for simulation program which allows the user to develop suitable RSMs based on the requirements of specific applications. <br/>}},
author = {{Field, Robert W. and Hausmanns, Stephan and Lipnizki, Frank and Laufenberg, Günther}},
keywords = {{Membranes; Pervaporation; Modelling}},
language = {{eng}},
month = {{09}},
pages = {{213--214}},
title = {{Mass transport in hydrophobic pervaporation: A model design tool kit based on the resistance-in-series model}},
year = {{1999}},
}