Assessment of scale-up dimensionless groups methodology of gas-solid fluidized beds using advanced non-invasive measurement techniques (CT and RPT)
| Autor: | Muthanna H. Al-Dahhan, Abdelsalam Efhaima |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Pressure drop
Engineering business.industry Estimation theory General Chemical Engineering 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology 020401 chemical engineering Fluidized bed SCALE-UP Fluid dynamics Tomography Fluidization 0204 chemical engineering 0210 nano-technology business Simulation Dimensionless quantity |
| Zdroj: | The Canadian Journal of Chemical Engineering. 95:656-669 |
| ISSN: | 0008-4034 |
| DOI: | 10.1002/cjce.22745 |
| Popis: | The most common scale-up methodology for gas-solid fluidized bed reactors that has been reported in the literature is based on matching the dimensionless groups. This scale-up methodology in the literature has been validated by only measuring global hydrodynamic parameters (overall holdups and pressure drop, etc.) without details. Therefore, in this work, we have applied our an advanced non-invasive measurement techniques, gamma-ray computed tomography (CT) and radioactive particle tracking (RPT) techniques for the first time to evaluate such scale-up methodology by measuring local hydrodynamic parameters. The results obtained demonstrate that the reported set of the dimensionless groups are not adequate in capturing all the interplay phenomena for achieving similarity in the local hydrodynamic parameters when the proposed set of dimensionless groups has been matched using two sizes of fluidized beds of 0.14 m and 0.44 m and sets of operating conditions. This finding confirms that the local measurements of the hydrodynamic parameters are essential for detailed assessment of scale-up methodologies. This article is protected by copyright. All rights reserved |
| Databáze: | OpenAIRE |
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