| 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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Kärger, Jörg
Leipzig University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023Precise control over gas-transporting channels in zeolitic imidazolate framework glassescitations
- 2022Diffusion in Nanoporous Materials: Challenges, Surprises and Tasks of the Day
- 2022Quantifying Diffusion-limited Catalytic Reactions in Hierarchically Structured Porous Materials by Combining Kinetic Monte Carlo Simulations with the Two-region Model of Diffusioncitations
- 2019Exploring guest dynamics in nanoporous host materials
- 2019Molecules in nanopores as a model system for mimicking spreading in nature and society
- 2016The options of interference microscopy to explore the significance of intracrystalline diffusion and surface permeation for overall mass transfer on nanoporous materials: The options of interference microscopy to explore the significance ofintracrystalline diffusion and surface permeation for overall masstransfer on nanoporous materials
- 2016Interference and IR-microscopy for studies of nanoporous materials: an insightful view on intracrystalline molecular transport
- 2016Monitoring the interplay between diffusion and reaction during catalytic conversion in nanoporous materials: Monitoring the interplay between diffusion and reaction during catalyticconversion in nanoporous materials
- 2016The effect of crystal diversity of nanoporous materials on mass transfer studies
- 2015The role of crystal diversity in understanding mass transfer in nanoporous materialscitations
- 2015Transport in nanoporous materials including MOFs : the applicability of Fick’s laws
- 2008Assessing one-dimensional diffusion in nanoporous materials from transient concentration profiles
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.