Oxygen transfer rate behavior in three phase electroflotation column
| Autor: | Lassaad Ben Mansour, Maroua Mejri |
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| Rok vydání: | 2021 |
| Předmět: |
Fluid Flow and Transfer Processes
Mass transfer coefficient Work (thermodynamics) Oxygen transfer Materials science 020209 energy Bubble Analytical chemistry 02 engineering and technology Condensed Matter Physics 020401 chemical engineering Three-phase Impurity Mass transfer 0202 electrical engineering electronic engineering information engineering Particle 0204 chemical engineering |
| Zdroj: | Heat and Mass Transfer. 57:1205-1210 |
| ISSN: | 1432-1181 0947-7411 |
| Popis: | The effects of bubble size, solids particle (impurities) and the respective physical mechanisms on gas–liquid columns have received little attention. Therefore, the objective of this work is to study the effect of solid concentration and the ratio of the bubble diameter to the solid diameter on the mass transfer characteristics. Experiments were conducted in a three phase electroflotation column for the systems gas/water/olive stone. Volumetric mass transfer coefficient, kLa, was measured under different solid concentrations values (1–3 g/l) and ratio of the bubble diameter to the solid diameter values. It was found that the kLa rises when the ratio of the bubble diameter to the solid diameter increase. The presence of solid particle has a negative effect on mass transfer coefficients (kLa,kL and a). The liquid side mass transfer coefficient has the same behavior as the volumetric mass transfer coefficient. The capacity of oxygenation CO was also studied. Models relating the mass transfer coefficients kLa, kL and CO were elaborated in each case using linear regression method. |
| Databáze: | OpenAIRE |
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