Angeli, P;
Tsaoulidis, D;
Hashi Weheliye, W;
(2019)
Studies on mass transfer of europium(III) in micro-channels using a micro Laser Induced Fluorescence technique.
Chemical Engineering Journal
, 372
pp. 1154-1163.
10.1016/j.cej.2019.04.084.
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Abstract
The mass transfer of europium(III) from an aqueous to an organic phase was studied in a quartz microchannel (internal diameter of 200 μm) using a novel micro Laser Induced Fluorescence (micro-LIF) technique. Europium(III) was extracted from a 1 M nitric acid solution into an organic solution of TBP(1.2 M)/CMPO(0.2 M) in Exxsol D80. For the flow rates investigated plug flow was established. An experimental and data processing methodology was developed to calculate concentration profiles from the fluorescing light intensity profiles in both phases at different locations along the microchannel. In particular, the effect that the high light intensity of the organic phase has on the measurements in the aqueous phase was taken into account. Mass transfer was found to be significant in the beginning of the channel close to the inlet (1 mm distance) with extraction percentages varying between 20 and 40% depending on the total flow rate. High extraction efficiency (∼80%) was achieved at short residence times (in the first 6 s), while the overall volumetric mass transfer coefficients varied between 0.05 and 3.3 s−1.
| Type: | Article |
|---|---|
| Title: | Studies on mass transfer of europium(III) in micro-channels using a micro Laser Induced Fluorescence technique |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cej.2019.04.084 |
| Publisher version: | https://doi.org/10.1016/j.cej.2019.04.084 |
| 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: | Mass transfer, micro-LIF, Europium(III), Microchannel, Liquid-Liquid |
| 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.ucl.ac.uk/id/eprint/10075999 |
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