Heat supply and reduction of polarization effects in pervaporation by two-phase feed

J. Fontalvo; M.A.G. Vorstman; J.G. Wijers; J.T.F. Keurentjes

doi:10.1016/j.memsci.2005.11.047

Heat supply and reduction of polarization effects in pervaporation by two-phase feed

J. Fontalvo, M.A.G. Vorstman, J.G. Wijers, J.T.F. Keurentjes

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Abstract

Gas- and vapor-liq. two-phase pervaporation was exptl. studied using a lab. scale and a bench scale pervaporation setup. Pervaporation expts. with low liq. flow rates in internally coated tubes were carried out for dewatering of 1,4-dioxane and iso-Pr alc. Relatively small amts. of gas or vapor are sufficient to reduce concn. and temp. polarization and to increase the total flux and selectivity more than two-fold compared with single-phase expts. The beneficial effects of a two-phase feed are also demonstrated by calcns. Addnl., by condensation the vapor effectively supplies the heat required for the selective evapn. through the membrane. As a consequence, this eliminates the liq. temp. drop that reduces the performance of pervaporation modules. The values of the total flux achieved using vapor-liq. two-phase pervaporation at laminar flow conditions are close to those for turbulent conditions. [on SciFinder (R)]

Original language	English
Pages (from-to)	156-164
Number of pages	9
Journal	Journal of Membrane Science
Volume	279
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2005.11.047
Publication status	Published - 2006

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title = "Heat supply and reduction of polarization effects in pervaporation by two-phase feed",

abstract = "Gas- and vapor-liq. two-phase pervaporation was exptl. studied using a lab. scale and a bench scale pervaporation setup. Pervaporation expts. with low liq. flow rates in internally coated tubes were carried out for dewatering of 1,4-dioxane and iso-Pr alc. Relatively small amts. of gas or vapor are sufficient to reduce concn. and temp. polarization and to increase the total flux and selectivity more than two-fold compared with single-phase expts. The beneficial effects of a two-phase feed are also demonstrated by calcns. Addnl., by condensation the vapor effectively supplies the heat required for the selective evapn. through the membrane. As a consequence, this eliminates the liq. temp. drop that reduces the performance of pervaporation modules. The values of the total flux achieved using vapor-liq. two-phase pervaporation at laminar flow conditions are close to those for turbulent conditions. [on SciFinder (R)]",

author = "J. Fontalvo and M.A.G. Vorstman and J.G. Wijers and J.T.F. Keurentjes",

year = "2006",

doi = "10.1016/j.memsci.2005.11.047",

language = "English",

volume = "279",

pages = "156--164",

journal = "Journal of Membrane Science",

issn = "0376-7388",

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TY - JOUR

T1 - Heat supply and reduction of polarization effects in pervaporation by two-phase feed

AU - Fontalvo, J.

AU - Vorstman, M.A.G.

AU - Wijers, J.G.

AU - Keurentjes, J.T.F.

PY - 2006

Y1 - 2006

N2 - Gas- and vapor-liq. two-phase pervaporation was exptl. studied using a lab. scale and a bench scale pervaporation setup. Pervaporation expts. with low liq. flow rates in internally coated tubes were carried out for dewatering of 1,4-dioxane and iso-Pr alc. Relatively small amts. of gas or vapor are sufficient to reduce concn. and temp. polarization and to increase the total flux and selectivity more than two-fold compared with single-phase expts. The beneficial effects of a two-phase feed are also demonstrated by calcns. Addnl., by condensation the vapor effectively supplies the heat required for the selective evapn. through the membrane. As a consequence, this eliminates the liq. temp. drop that reduces the performance of pervaporation modules. The values of the total flux achieved using vapor-liq. two-phase pervaporation at laminar flow conditions are close to those for turbulent conditions. [on SciFinder (R)]

AB - Gas- and vapor-liq. two-phase pervaporation was exptl. studied using a lab. scale and a bench scale pervaporation setup. Pervaporation expts. with low liq. flow rates in internally coated tubes were carried out for dewatering of 1,4-dioxane and iso-Pr alc. Relatively small amts. of gas or vapor are sufficient to reduce concn. and temp. polarization and to increase the total flux and selectivity more than two-fold compared with single-phase expts. The beneficial effects of a two-phase feed are also demonstrated by calcns. Addnl., by condensation the vapor effectively supplies the heat required for the selective evapn. through the membrane. As a consequence, this eliminates the liq. temp. drop that reduces the performance of pervaporation modules. The values of the total flux achieved using vapor-liq. two-phase pervaporation at laminar flow conditions are close to those for turbulent conditions. [on SciFinder (R)]

U2 - 10.1016/j.memsci.2005.11.047

DO - 10.1016/j.memsci.2005.11.047

M3 - Article

SN - 0376-7388

VL - 279

SP - 156

EP - 164

JO - Journal of Membrane Science

JF - Journal of Membrane Science

IS - 1-2

ER -

Heat supply and reduction of polarization effects in pervaporation by two-phase feed

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