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A modelling approach for the comparison between intensified extraction in small channels and conventional solvent extraction technologies

Bascone, D; Angeli, P; Fraga, ES; (2019) A modelling approach for the comparison between intensified extraction in small channels and conventional solvent extraction technologies. Chemical Engineering Science , 203 pp. 201-211. 10.1016/j.ces.2019.03.074. Green open access

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Abstract

In this paper, the application of small channels to the extraction separations in spent nuclear fuel reprocessing has been investigated via a modelling approach. The results are compared with conventional liquid-liquid extraction technologies such as mixer- settlers and pulsed columns, using models from the literature. In the model mass transfer, redox reactions, pressure drop and nuclear criticality are taken into account, as well as manifold and two-phase separator designs for the small-scale technology. The resulting model, posed as an optimisation problem, is a mixed integer nonlinear problem, implemented in the General Algebraic Modeling System (GAMS). An alternative flowsheet for the codecontamination section of the PUREX process, as a case study, has been investigated. The results show that the smallscale technology could be beneficial, in particular in terms of volumetric mass transfer coefficients, nuclear criticality safety and short residence time, which improves neptunium separation and reduces solvent degradation.

Type: Article
Title: A modelling approach for the comparison between intensified extraction in small channels and conventional solvent extraction technologies
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ces.2019.03.074
Publisher version: https://doi.org/10.1016/j.ces.2019.03.074
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: Liquid-liquid extraction; small channels; spent nuclear fuel reprocessing; optimisation; process design.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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/10074120
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