Massive growth of a fibrous gas hydrate from surface macropores of an activated carbon - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemical Engineering Science Année : 2023

Massive growth of a fibrous gas hydrate from surface macropores of an activated carbon

Résumé

Venet et al., reported unprecedented, bundled growth of ≈ 1-10 mm long, hollow gas hydrate fibres, diameter ≈ 1-10 m, on an activated carbon close to a guest-water interface, circumventing the hydrate growth bottleneck. Here, in situ video microscopy traces growth (2-3 µm at 0.5 C) to surface macropores of similar diameter, further exhibited by confocal and scanning electron microscopies. X-ray radiography shows fluid exchange to a depth of ≈ 50-100 µm in a total porous fraction 40 % (gravimetric porometry). Computed X-ray microtomography reveals a belt of organised peripheral porosity of aligned m pores. These structures explain the origin of the comb or whalebone-like appearance of the hydrate. Whereas hydrate promotion by porous media is usually assumed to proceed inside the materials, like tiny hydrate storage warehouses, we find that the substrate behaves more like a ’lean’ or ’just in time’ production line, with hydrate extruded as fast as it is produced near the surface.
Fichier principal
Vignette du fichier
Venet_etal_MS_final.pdf (5.36 Mo) Télécharger le fichier
Venet_etal_SI_final.pdf (389.58 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY NC ND - Paternité - Pas d'utilisation commerciale - Pas de modification
Licence : CC BY NC ND - Paternité - Pas d'utilisation commerciale - Pas de modification

Dates et versions

hal-03895083 , version 1 (20-12-2022)

Identifiants

Citer

Saphir Venet, Hannelore Derluyn, Fabrice Guerton, Peter Moonen, Daniel Broseta, et al.. Massive growth of a fibrous gas hydrate from surface macropores of an activated carbon. Chemical Engineering Science, 2023, 265, pp.118190. ⟨10.1016/j.ces.2022.118190⟩. ⟨hal-03895083⟩
44 Consultations
12 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More