Oxalate Precipitation in Emulsion: from the Drop Scale to the Industrial Process

Amokrane, Abdenour; Kacem, Amine; Charton, Sophie; Puel, François; Klein, Jean-Paul

Document type :

Communication dans un congrès avec actes

DOI :

10.1016/j.proche.2012.10.069

Title :

Oxalate Precipitation in Emulsion: from the Drop Scale to the Industrial Process

Author(s) :

Amokrane, Abdenour [Auteur]
Département de Technologies du Cycle du combustible [DTEC]
Kacem, Amine [Auteur]
Département de Technologies du Cycle du combustible [DTEC]
Charton, Sophie [Auteur]
Département de Technologies du Cycle du combustible [DTEC]
Puel, François [Auteur]
Laboratoire d'automatique et de génie des procédés [LAGEP]
Klein, Jean-Paul [Auteur]
Laboratoire d'automatique et de génie des procédés [LAGEP]
Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL]

Scientific editor(s) :

Poinssot, C

Conference title :

International Conference on Nuclear Chemistry for Sustainable Fuel Cycles (ATALANTE)

City :

Montpellier

Country :

France

Start date of the conference :

2012-09-03

Book title :

Procedia Chemistry

Journal title :

ATALANTE 2012 INTERNATIONAL CONFERENCE ON NUCLEAR CHEMISTRY FOR SUSTAINABLE FUEL CYCLES

Publisher :

ELSEVIER SCIENCE BV

Publication date :

2012

HAL domain(s) :

Sciences de l'ingénieur [physics]/Génie des procédés

English abstract : [en]

An original process of actinides coprecipitation, based on either pulsed or Taylor-Couette flows column, is studied. The novelty of this process lies in the confinement of the aqueous reagents in droplets, dispersed in an ...
Show more >An original process of actinides coprecipitation, based on either pulsed or Taylor-Couette flows column, is studied. The novelty of this process lies in the confinement of the aqueous reagents in droplets, dispersed in an inert organic phase (W/O emulsion). Besides the implementation of well-known technologies of the nuclear industry, the emulsion process is particularly convenient for the control of supersaturation, and ensures the sticky precipitates confinement within drops, thereby limiting the fouling risk and its adverse consequences on productivity and safety.A thorough understanding of the precipitation mechanisms and their interactions with the hydrodynamic conditions prevailing around and inside the drops is essential for the process optimization. In this context, numerical simulations were conducted, accompanying experiments, to study the process sensitivity. Different levels were considered in the modeling task, going from the emulsion behavior inside the column, to the reagents mixing and precipitation within the drops. Regarding the drops scale, on which we focus in this paper, population balance equations (PBE) were coupled to fluid dynamics simulation. Different methods of resolution of the PBE were tested. The behavior of the precipitate was also assessed using a Lagrangian approach. Thanks to these drop scale simulations, process experiments were discussed and analyzed.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189

Source :

Harvested from HAL

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