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Modelling transport mechanism through a porous partition

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Khayet Souhaimi, Mohamed and Godino Gómez, María Paz and Mengual Cabezón, Juan Ignacio (2001) Modelling transport mechanism through a porous partition. Journal of Non-Equilibrium Thermodynamics, 26 . pp. 1-14. ISSN 0340-0204

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Official URL: http://dx.doi.org/10.1515/JNETDY.2001.001


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Abstract

The physical nature of water flow, in vapour phase, through the pores of a microporous partition has been studied according to the possibilities suggested by the Kinetic Theory of Gases. A method is proposed that permits to decide which is the most reasonable possibility for the transport mechanism. In order to check the proposed model, the phenomenon of membrane distillation has been studied with four commercial membranes, in different experimental conditions. The influence of some relevant parameters, such as mean temperature and stirring rate, has been considered. Tile quantitative influence of the unstirred boundary layers, adjoining both faces of the membrane, has been taken into account. The calculations show that, apparently, the water flux is composed of two contributions: a Knudsen type flux plus a diffusive one.


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© Copyright 2001 Walter de Gruyter. Economical support from the CICYT is greatly acknowledged.

Uncontrolled Keywords:Membrane distillation; Microporous membranes; Hydrophobic membranes; Heat
Subjects:Sciences > Physics > Thermodynamics
ID Code:25158
Deposited On:28 Apr 2014 11:45
Last Modified:10 Nov 2015 14:55

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