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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
The role of crystal diversity in understanding mass transfer in nanoporous materials
Abstract
Nanoporous materials find widespread applications in our society: from drug delivery to environmentally friendly catalysis and separation technologies. The efficient design of these processes depends crucially on understanding the mass transfer mechanism. This is conventionally determined by uptake or release experiments, carried out with assemblages of nanoporous crystals, assuming all crystals to be identical. Using micro-imaging techniques, we now show that even apparently identical crystals (that is, crystals of similar size and shape) from the same batch may exhibit very different uptake rates. The relative contribution of the surface resistance to the overall transport resistance varied with both the crystal and the guest molecule. As a consequence of this crystal diversity, the conventional approach may not distinguish correctly between the different mass transfer mechanisms. Detection of this diversity adds an important new piece of evidence in the search for the origin of the surface barrier phenomenon. Our investigations were carried out with the zeolite SAPO-34, a key material in the methanol-to-olefins (MTO) process, propane-propene separation and adsorptive heat transformation.