Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Salt storage and induced crystallisation in porous asymmetric inorganic membranes

Abstract : Processing brines to recover strategic mineral salts using evaporation ponds requires large surface areas and are slow, even in arid climates. Here we show a novel membrane macropore storage mechanism that induces fast salt crystallisation in mesoporous top-layers in inorganic asymmetric membranes, stemming from 789 million nucleation points per metre square of surface area. During membrane pervaporation, dissolved salts are retained mainly in the macropores of the substrate which subsequently provide ideal conditions for crystal nucleation and growth on the membrane surface upon drying. This novel pore storage mechanism is attained owing to the solution flow modulation of the mesoporous titania and gamma-alumina layers that is counterbalanced by the flow of water during pervaporation. Therefore, pore size control is imperative to avoid flooding in the macroporous substrate. This work further shows the fundamental properties of the salt storage mechanism described by a single salt production coefficient, and a global salt production coefficient for metal chloride salts. This technology could potentially be considered for unlocking and process strategic global minerals from brines.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-03371555
Contributeur : Anne Julbe Connectez-vous pour contacter le contributeur
Soumis le : vendredi 8 octobre 2021 - 17:16:10
Dernière modification le : vendredi 22 octobre 2021 - 14:46:32

Fichier

JMS_Fu_etal_VF.docx.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Weng Fu, Julius Motuzas, David Wang, Christelle Yacou, Anne Julbe, et al.. Salt storage and induced crystallisation in porous asymmetric inorganic membranes. Journal of Membrane Science, Elsevier, 2022, 641, pp.119872. ⟨10.1016/j.memsci.2021.119872⟩. ⟨hal-03371555⟩

Partager

Métriques

Consultations de la notice

27

Téléchargements de fichiers

9