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EnglishWe report on a first-principles numerical study explaining the potential advantage of core-shell particles with strictly radially-oriented mesopores. Comparing the efficiency of these particles with fully porous and core-shell particles with a conventional (i.e., randomly oriented) mesopore network, the present numerical study shows a similar strong reduction in minimal reduced plate height (h(min)) as was very recently observed in an experimental study by Wei et al. (respectively a h(min)-reduction on the order of about 1 and 0.5 reduced plate height-units). As such, the present work provides a theoretical basis to understand and confirm their experimental findings and quantifies the general advantage of "radial-diffusion-only" particles. Determining the effective longitudinal diffusion (B-term contribution) in a series of dedicated, independent simulations, it was found that this contribution can be described by a very simple, yet fully exact mathematical expression for the case of "radial- diffusion-only" particles. Using this expression, the significant increase in efficiency of these particles can be fully attributed to their much smaller B-term band broadening, while their C-term band broadening (representing the mass transfer resistance) remains unaffected.
| Titolo: | A theoretical study on the advantage of core-shell particles with radially-oriented mesopores | |
| Autori: | CATANI, Martina (Secondo) CAVAZZINI, Alberto (Penultimo) | |
| Data di pubblicazione: | 2016 | |
| Rivista: | ||
| Handle: | http://hdl.handle.net/11392/2351257 | |
| Appare nelle tipologie: | 03.1 Articolo su rivista |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 1-s2.0-S0021967316306690-main.pdf | versione editoriale | Full text (versione editoriale) | NON PUBBLICO - Accesso privato/ristretto | Administrator Richiedi una copia |
| 11392-2351257_preprint_Catani_Martina.pdf | Pre print | Pre-print | PUBBLICO - Pubblico con Copyright | Open Access Visualizza/Apri |
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