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Observational comparative study in Kühni and ORC agitated columns for the mechanism and performance of molybdenum extraction under various hydrodynamic conditions

Shakib, B ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijheatmasstransfer.2021.122337
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. The present work is expressed to interpret the hydrodynamic parameters of rotation extraction columns in the reactive and non-reactive systems. The solvent extraction technique has been utilized for optimizing the transportation of molybdenum ions to the organic phase in two agitated columns (ORC and Kühni columns). Dispersed phase volume fraction, average droplet diameter, slip velocity, size distribution, and ions permeability of the aqueous phase have been investigated in terms of changing the operational variables including the agitation rate, flow rate of the inlet dispersed and continuous phases, column geometry, and reaction conditions. By considering the reactive and non-reactive conditions, the responses investigated indicated that the alteration in the agitation rate and reaction systems on the hydrodynamic parameters is considerable in comparison with the column geometry as well as both phase flow rates. Previous experimental research works for anticipating the drop behavior, holdup values, and slip velocity of droplets in different rotary columns have been reviewed and several new models have been derived by considering the geometric parameters and reactive or physical systems. The solvent extraction findings showed that the rotary extraction columns could be utilized as a suitable mass transfer device for chemical reaction systems. © 2021 Elsevier Ltd
  6. Keywords:
  7. Solvent extraction ; Drops ; Geometry ; Hydrodynamics ; Mass transfer ; Metal ions ; Molybdenum ; Reaction rates ; Size distribution ; Solvents ; Agitated column ; Agitation rates ; Dispersed phasis ; Drop size distribution ; Extraction columns ; Hydrodynamic parameters ; Kuhni column ; ORC column ; Reactive system ; Slip velocity
  8. Source: International Journal of Heat and Mass Transfer ; Volume 185 , 2022 ; 00179310 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0017931021014368