Numerical Simulation of Uranium Extraction from Nitric Acid Medium Using Hollow-Fiber Contactor

Swain, Biswajit; Singh, K.K.; Pabby, Anil Kumar

doi:10.1080/07366299.2019.1695350

Cited by 9 publications

(8 citation statements)

References 42 publications

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“…The amount of uranium extraction at different TBP concentration was shown in Table 2 . The experimental results provided in Table 2 are those reported Swain et al 17 , 26 . Increasing in extractant concentration results in the enhancement of uranium extraction from aqueous solution in to organic phase.…”

Section: Resultssupporting

confidence: 53%

“… TBP concentration (%) Exp. U extraction 17 Model U extraction 5 2.5 2.59 10 5 4.44 20 16 16.83 30 29 34.13 …”

Section: Resultsmentioning

confidence: 99%

“…1 . Furthermore, the reaction mechanisms can be written as follow 17 , 19 :

Figure 1 Schematic of membrane extractor for the uranium extraction using TBP. …”

Section: Numerical Investigationmentioning

confidence: 99%

“…However, it is incredibly difficult to find works which the simulation and modelling of uranium extraction were investigated. Swain et al 17 used a computational fluid dynamics (CFD) mathematical model to study U extraction from HNO 3 medium by tri-n-butyl phosphate (TBP) as extractant in n-dodecane as dilute in a hollow-fibre membrane contactor (HFMC). Effect of different operating parameters on the extraction percentage were evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…The Swain et al 17 work was extended in the current study in order to examine in more details effect of various critical parameters of diffusive and convective uranium flux in the membrane contactor. Moreover, the change in diffusion coefficient and physical properties like viscosity as well as density with change in extractant concentration was considered.…”

Section: Introductionmentioning

confidence: 99%

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Computational simulation and modelling of uranium extraction using tributylphosphate through membrane extractor

Syah

Ramadan

Elveny

et al. 2021

Sci Rep

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Non-disperse solvent extraction is an effective technique for the extraction of metal ions from aqueous solution. In this study, uranium extraction using n-dodecane solvent containing tributylphosphate extractant in a membrane contactor was investigated. A 2D mathematical model was developed for the fluid flow and mass transfer in the hollow fibre membrane extractor. The equations of the created model were solved using the finite element method. The uranium concentration distribution in the extractor at different extractant concentrations as well as feed acidity was studied. The results showed that there is reasonable good agreement between experimental uranium extraction and modelling outputs at different extractant concentrations. Increasing extractant concentration from 5 to 30% led to the enhancement of uranium extraction from 2.60 to 34.13%. Also, there was an increase in the uranium extraction with increasing feed acidity in the range of 1–3 M. Furthermore, based on the radial uranium concentration distribution, it was found that the main mass transfer resistance in the system was microporous membrane section. Finally, it was obtained that the uranium extraction efficiency could be improved significantly by increasing porosity-to-tortuosity ratio. It was concluded that the membrane specification plays the most important role as the dominant mass transfer resistant was in the membrane subdomain.

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Section: Resultssupporting

confidence: 53%