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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pandey, Jyoti Shanker
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2024CH4 Adsorption in Wet Metal-Organic Frameworks under Gas Hydrate Formation Conditions Using A Large Reactorcitations
- 2023High-Pressure Isotherms of Gas Hydrates with Nanoporous Materials: Investigating Storage Capacity and Formation Dynamics
- 2023Metal–Organic Frameworks and Gas Hydrate Synergy: A Pandora’s Box of Unanswered Questions and Revelationscitations
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article
CH4 Adsorption in Wet Metal-Organic Frameworks under Gas Hydrate Formation Conditions Using A Large Reactor
Abstract
Nanoporous materials, such as metal-organic frameworks (MOFs), arerenowned for their high selectivity as gas adsorbents due to theirspecific surface area, nanoporosity, and active surface chemistry. Asignificant challenge for their widespread application is reduced gasuptake in wet conditions, attributed to competitive adsorption betweengas and water. Recent studies of gas adsorption in wet materials havetypically used small amounts of powdered porous materials (in themilligram range) within very small reactors (1–5 mL). This leaves a gapin knowledge about gas adsorption behaviors in larger reactors and withincreased MOF sample sizes (to the gram scale). Additionally, there hasbeen a notable absence of experimental research on MOFs heavilysaturated with water. In this study, we aimed to fill the gaps in ourunderstanding of gas adsorption in wet conditions by measuring CH<sub>4</sub>adsorption in MOFs. To do this, we used larger MOF samples (in grams)and a large-volume reactor. Our selection of commercially availableMOFs, including HKUST-1, ZIF-8, MOF-303, and activated carbon, was basedon their widespread application, available previous research, anddifferences in hydrophobicity. Using a volumetric approach, we measuredhigh-pressure isotherms (at T = 274.15 K) to compare the moles of gasadsorbed under both dry and wet conditions across different MOFs andweights. The experimental results indicate that water decreases total CH<sub>4</sub>adsorption in MOFs, with a more pronounced decrease in hydrophilic MOFscompared to hydrophobic ones at lower pressures. However, hydrophilicMOFs exhibited stepped isotherms at higher pressures, suggesting waterconverts to hydrate, positively impacting total gas uptake. In contrast,the hydrophobic ZIF-8 did not promote hydrate formation due to particleaggregation in the presence of water, leading to a loss of surface areaand surface charge. This study highlights the additional challengesassociated with hydrate-MOF synergy when experiments are scaled up andlarger sample sizes are used. Future studies should consider usingmonolith or pellet forms of MOFs to address the limitations of powderedMOFs in scale-up studies.