Meso/macropore emerging from MOF granulation for enhancing performance in the Xe/Kr separation

[Display omitted] •Granulating SBMOF-1 powder using eco-friendly water/PVA system.•Energy-efficient, time-saving granulation by avoiding sophisticated solvent removal.•Enhancing performance in Xe/Kr Separation from UNF reprocessing off-gas.•Meso/Macropore leads to 128% enhancement of the breakthroug...

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Bibliographic Details
Published in:Separation and purification technology 2024-09, Vol.343, p.127128, Article 127128
Main Authors: Tu, Thach N., Shin, YuJeong, Khalate, Suraj A., Chang, Kunok, Kwon, Hyuk Taek, Kim, Jinsoo
Format: Article
Language:English
Subjects:
Energy efficentcy column regeneration
Enhancing mass diffusion
Hierarchical
Metal–organic frameworks (MOFs)
Powders granulation
Xe/Kr separation
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Summary:[Display omitted] •Granulating SBMOF-1 powder using eco-friendly water/PVA system.•Energy-efficient, time-saving granulation by avoiding sophisticated solvent removal.•Enhancing performance in Xe/Kr Separation from UNF reprocessing off-gas.•Meso/Macropore leads to 128% enhancement of the breakthrough time over powder samples.•Reducing the operation cost by column regeneration via helium flow at room temperate. The eco-friendly water/PVA system (PVA = polyvinyl alcohol) was employed to granulate SBMOF-1 powder to form SBMOF-1@20%PVA beads. The granulated beads maintained the high crystallinity of SBMOF-1 with the emergence of meso/macropores at 3.8, 50, and 76 nm. Owing to its benefit for mass diffusion, the presence of meso/macro porosity led to ∼128% enhancement of the Xe uptake capacity (based on SBMOF-1) of SBMOF-1@20%PVA beads over SBMOF-1 powder at 20% Xe broke through. This further enabled Xe/Kr separation from the simulated used nuclear fuel (UNF) reprocessing off-gas. Moreover, an easier and faster regeneration of SBMOF-1@20%PVA over SBMOF-1 powder through helium purge was obtained at room temperature. These findings demonstrate an enhanced working efficiency of the granulated SBMOF-1 beads over the powder samples by improving uptake capacity, saving energy for regeneration at high temperatures and cooling time after the heating-up regeneration, thereby highlighting the benefit of our engineering protocol in enhancing separation performance via MOF granulation.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2024.127128