| People | Locations | Statistics |
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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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Baron, Gino
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Structure I methane hydrate confined in C8-grafted SBA-15citations
- 2023Development of a 3D-Printable, Porous, and Chemically Active Material Filled with Silica Particles and its Application to the Fabrication of a Microextraction Devicecitations
- 2020Evaluation of particle and bed integrity of aqueous size-exclusion columns packed with sub-2 µm particles operated at high pressurecitations
- 2020Selection of binder recipes for the formulation of MOFs into resistant pellets for molecular separations by fixed-bed adsorptioncitations
- 2019Highly Robust MOF Polymeric Beads with a Controllable Size for Molecular Separationscitations
- 2019Exceptional HCl removal from Hydrogen gas by Reactive Adsorption on a Metal-Organic Framework
- 2019Study of peak capacities generated by a porous layered radially elongated pillar array column coupled to a nano-LC systemcitations
- 2017Gel-based morphological design of zirconium metal-organic frameworkscitations
- 2016The effect of crystal diversity of nanoporous materials on mass transfer studies
- 2015The role of crystal diversity in understanding mass transfer in nanoporous materialscitations
- 2015Poster: A comprehensive study of the macro- and mesopores size distributions of polymer monoliths using complementary physical characterization techniques
- 2015Polyimide mixed matrix membranes for CO2 separations using carbon-silica nanocomposite fillerscitations
Places of action
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article
Structure I methane hydrate confined in C8-grafted SBA-15
Abstract
<p>Confinement of water and methane in mesopores of hydrophobized SBA-15 is demonstrated to promote methane hydrate formation. In comparison to as-synthesized SBA-15, hydrophobization by C<sub>8</sub> grafting accelerates the kinetics of methane storage in and delivery from the hydrate. C<sub>8</sub> grafting density was determined at 0.5 groups nm<sup>−2</sup> based on TGA and quantitative NMR spectroscopy. Multinuclear <sup>1</sup>H-<sup>1</sup>H DQSQ and <sup>1</sup>H-<sup>1</sup>H RFDR NMR provided spectroscopic evidence for the occurrence of C<sub>8</sub> chains inside the mesopores of SBA-15, by showcasing close spatial proximity between the grafted C<sub>8</sub> chains and pore-intruded water species. X-ray diffraction demonstrates formation of Structure I hydrate on SBA-15 C<sub>8</sub>. At 7.0 MPa and 248 K, the water-to-hydrate conversion on hydrophobized SBA-15 C<sub>8</sub> reaches 96% as compared to only 71% on a pristine SBA-15 sample with comparable pore size, pore volume and surface area. The clathrate loading amounted to 14.8 g/g. 2D correlation NMR spectroscopy (<sup>1</sup>H-<sup>13</sup>C CP-HETCOR, <sup>1</sup>H-<sup>1</sup>H RFDR) reveals hydrate formation occurs within pores of SBA-15 C<sub>8</sub> as well as in interparticle volumes. Following the initial crystallization of SBA-15 C<sub>8</sub>-supported methane hydrate taking several hours, a pressure swing process at 248 K allows to desorb and re-adsorb methane from the structure within minutes and without thawing the frozen water structure. Fast loading and unloading of methane was achieved in 19 subsequent cycles without losses in kinetics. The ability to harvest the gas and regenerate the structure without the need to re-freeze the water represents a 50% energy gain with respect to melting and subsequently recrystallizing the hydrate at 298 K and 248 K, respectively. After methane desorption, a small amount of residual methane hydrate in combination with an amorphous yet locally ordered ice phase is observed using <sup>13</sup>C and <sup>2</sup>H NMR spectroscopy. This effect offers an explanation for the enhanced hydrate formation kinetics in adsorption-desorption cycles. These findings open new perspectives for clathrate hydrate-based methane storage.</p>