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- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received May 14, 2025
Revised July 31, 2025
Accepted August 21, 2025
Available online January 25, 2026
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Latest issues
Optimizing Hydrate‑Based CO2 Capture in Saline Environments Using Low‑Dosage THF for Seawater Utilization
https://doi.org/10.1007/s11814-025-00547-5
Abstract
This study investigated the influence of low-dosage thermodynamic promoters on gas hydrate-based CO2
capture from CO2+ N2mixtures in saline environments for offshore applications. Phase equilibria measured in the presence of 0.1 and
1.0 mol% tetrahydrofuran (THF) demonstrated that a small amount of THF mitigated the inhibition effect of NaCl. However,
the promotion effect diminished with increasing pressure, possibly due to the transfer of a small fraction of THF molecules
to the vapor phase at high pressure. Weight fractions calculated from Rietveld analysis revealed that low-dosage THF promoted
sII hydrate formation, enhancing thermodynamic stability. Cage-dependent guest occupancy indicated that higher
THF concentrations in solution decreased both CO2 selectivity and capacity, as N2 was preferentially captured in the small
cages of sII hydrates. These findings provide insights into optimizing hydrate-based CO2 capture in offshore environments
by balancing thermodynamic stability enhancement with CO2 separation efficiency.
