LrgpV1, Main, Exploration, bibRecord, 000C13

Gas-phase mass-transfer measurements in a falling-film microreactor

Identifieur interne : 000C13 ( Main/Exploration ); précédent : 000C12; suivant : 000C14

Gas-phase mass-transfer measurements in a falling-film microreactor

Auteurs : J.-M. Commenge [France] ; T. Obein [France] ; X. Framboisier [France] ; S. Rode [France] ; P. Pitiot [France] ; M. Matlosz [France]

Source :

Chemical engineering science [ 0009-2509 ] ; 2011.

RBID : Pascal:11-0135688

Descripteurs français

Pascal (Inist)
- Transfert masse, Film tombant, Microréacteur, Réacteur chimique, Réaction exothermique, Condition opératoire, Réaction gaz liquide, Dioxyde de soufre, Coefficient transfert masse, Nombre Sherwood, Hydrodynamique, Nombre Reynolds, Propriété physicochimique, Nombre Schmidt, Microstructure.

English descriptors

KwdEn :
- Chemical reactor, Exothermic reaction, Falling film, Gas liquid reaction, Hydrodynamics, Mass transfer, Mass transfer coefficient, Microreactor, Microstructure, Operating conditions, Physicochemical properties, Reynolds number, Schmidt number, Sherwood number, Sulfur dioxide.
mix :
- Chemical reactors, Falling-film microreactor, Films, Mass transfer, Microstructure, Multiphase reactors.

Abstract

The industrial-scale performance of gas-liquid reactors is difficult to control when very rapid or highly exothermic reactions are involved. Microstructured reactors offer new opportunities for these reactions by enabling precise heat management and accurate control of operating conditions. The present study examines experimentally the gas-phase mass-transfer characteristics of a reactor tool for the characterization of gas-liquid reactions: a falling-film microreactor. A well-known chemical test system, the absorption of sulfur dioxide SO₂ by sodium hydroxide NaOH is employed to determine the characteristics. The measurements of inlet and outlet concentrations in the gas phase enable the mass-transfer coefficient to be determined. The mass-transfer characteristics, in terms of dimensionless Sherwood number Sh_G, are then related to the hydrodynamic characteristics of the gas phase, through the Reynolds number Re_G, and the physicochemical properties of the reactional system, through the Schmidt number Sc_G. A strong dependence of dimensionless Sherwood number on gas-phase Reynolds number is observed, probably resulting from the specific features of the geometry of the gas-phase inlet.

Url:

https://hal.archives-ouvertes.fr/hal-00606332

Affiliations:

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical reactor</term>
<term>Exothermic reaction</term>
<term>Falling film</term>
<term>Gas liquid reaction</term>
<term>Hydrodynamics</term>
<term>Mass transfer</term>
<term>Mass transfer coefficient</term>
<term>Microreactor</term>
<term>Microstructure</term>
<term>Operating conditions</term>
<term>Physicochemical properties</term>
<term>Reynolds number</term>
<term>Schmidt number</term>
<term>Sherwood number</term>
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<term>Film tombant</term>
<term>Microréacteur</term>
<term>Réacteur chimique</term>
<term>Réaction exothermique</term>
<term>Condition opératoire</term>
<term>Réaction gaz liquide</term>
<term>Dioxyde de soufre</term>
<term>Coefficient transfert masse</term>
<term>Nombre Sherwood</term>
<term>Hydrodynamique</term>
<term>Nombre Reynolds</term>
<term>Propriété physicochimique</term>
<term>Nombre Schmidt</term>
<term>Microstructure</term>
</keywords>
<keywords scheme="mix" xml:lang="en"><term>Chemical reactors</term>
<term>Falling-film microreactor</term>
<term>Films</term>
<term>Mass transfer</term>
<term>Microstructure</term>
<term>Multiphase reactors</term>
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<front><div type="abstract" xml:lang="en">The industrial-scale performance of gas-liquid reactors is difficult to control when very rapid or highly exothermic reactions are involved. Microstructured reactors offer new opportunities for these reactions by enabling precise heat management and accurate control of operating conditions. The present study examines experimentally the gas-phase mass-transfer characteristics of a reactor tool for the characterization of gas-liquid reactions: a falling-film microreactor. A well-known chemical test system, the absorption of sulfur dioxide SO<sub>2</sub>
 by sodium hydroxide NaOH is employed to determine the characteristics. The measurements of inlet and outlet concentrations in the gas phase enable the mass-transfer coefficient to be determined. The mass-transfer characteristics, in terms of dimensionless Sherwood number Sh<sub>G</sub>
, are then related to the hydrodynamic characteristics of the gas phase, through the Reynolds number Re<sub>G</sub>
, and the physicochemical properties of the reactional system, through the Schmidt number Sc<sub>G</sub>
. A strong dependence of dimensionless Sherwood number on gas-phase Reynolds number is observed, probably resulting from the specific features of the geometry of the gas-phase inlet.</div>
</front>
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<name sortKey="Framboisier, X" sort="Framboisier, X" uniqKey="Framboisier X" first="X." last="Framboisier">X. Framboisier</name>
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</record>

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Gas-phase mass-transfer measurements in a falling-film microreactor

Gas-phase mass-transfer measurements in a falling-film microreactor

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Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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