Assessment of population balance approach and maximum entropy on drop size behavior of vanadium extraction from sulfate solution in continuous pilot plant column

Asadollahzadeh, Mehdi; Torkaman, Rezvan; Torab‐Mostaedi, Meisam

doi:10.1016/j.cep.2021.108608

Cited by 5 publications

(1 citation statement)

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“…The study of mass transfer in the scale-up extractor will play a significant role in an industrial application in the future. The utilized method to measure mass transfer coefficients on both sides varies from empirical to theoretical, first-principles, and mechanistic models 25 . Plug flow, backflow, axial dispersion models are essential to describe mass transfer.…”

Section: Introductionmentioning

confidence: 99%

Establishing forward mixing model to mass transfer overview in multi-impeller agitated column for rare Earth extraction process

Torkaman,

Rovais,

Asadollahzadeh

et al. 2024

Sci Rep

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The current study develops comprehensive mass transfer models to optimize the rare earth extraction. A plug flow, axial dispersion, backflow, forward mixing-based mass transfer model was created and solved numerically using the fitting technique. The investigated process is a multi-impeller agitated column designed to provide proper contact between organic and aqueous phases to extract rare-earth ions. Taking Sm(III)–Gd(III) separation as an application case, extraction efficiency in the agitation speed of 200 rpm was obtained equal to 95.14%, 76.67% by this column for Gd(III), and Sm(III) ions, respectively. The model's findings were compared with experimental data, and a significant agreement was achieved with the forward mixing model. The results indicated that the high agitation speed is beneficial to increasing the interfacial area while reducing the mass-transfer coefficient. On the contrary, the circulation within the larger droplet improves the transfer of mass, albeit at the expense of reducing the interfacial area. The results showed that the drop size distribution is a crucial factor as the droplet sizes significantly affect the droplet mass transfer. The mathematical models’ values of Ec for mass transfer parameters showed that the operational variables significantly affect the mass transfer rate and can cause deviations from the ideal flow path. A reasonable and appropriate estimation of the organic-side volumetric overall mass transfer coefficient was provided, which can be applied to this contactor’s design and scale-up.

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Section: Introductionmentioning

confidence: 99%