Garciadiego-Ortega, E;
Tsaoulidis, D;
Pineda, M;
Fraga, ES;
Angeli, P;
(2020)
Hydrodynamics and mass transfer in segmented flow small channel contactors for uranium extraction.
Chemical Engineering and Processing - Process Intensification
, 153
, Article 107921. 10.1016/j.cep.2020.107921.
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Abstract
In this work, the extraction of U(VI) by tributyl phosphate (TBP) is studied in small channels of different sizes, operated in segmented flow. The variables analysed include the channel diameter (1–4 mm I.D.), mixture velocity (1.06 - 4.24 cm s−1), volume fraction of the continuous phase (between 0.200 and 0.500), and concentration of extractant (TBP 30% v/v in kerosene and TBP 100%). The hydrodynamic characteristics of the flow, such as plug and slug lengths, specific interfacial area, and dispersed phase holdup, were obtained experimentally using high-speed imaging, while the pressure drop was measured with a differential pressure transducer. These parameters were correlated to the studied variables. The concentration of uranium in the aqueous phase was measured with UV-vis spectroscopy, and the mass transfer coefficients were compared with the predictions of a numerical model of segmented flow developed in Comsol Multiphysics, with good agreement.
| Type: | Article |
|---|---|
| Title: | Hydrodynamics and mass transfer in segmented flow small channel contactors for uranium extraction |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cep.2020.107921 |
| Publisher version: | https://doi.org/10.1016/j.cep.2020.107921 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Segmented flow, Liquid-liquid extraction, Interfacial mass transfer, Pressure drop, High-speed imaging |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10102419 |
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