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Countercurrent Actinide Lanthanide Separation Process (ALSEP) Demonstration Test with a Simulated PUREX Raffinate in Centrifugal Contactors on the Laboratory Scale

Wilden, Andreas; Kreft, Fabian; Schneider, Dimitri; Paparigas, Zaina; Modolo, Giuseppe; Lumetta, Gregg J.; Gelis, Artem V.; Law, Jack D.; Geist, Andreas

Abstract:
An Actinide Lanthanide Separation Process (ALSEP) for the separation of trivalent actinides (An(III)) from simulated raffinate solution was successfully demonstrated using a 32-stage 1 cm annular centrifugal contactor setup. The ALSEP solvent was composed of a mixture of 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP]) and N,N,N′,N′-tetra-(2-ethylhexyl)-diglycolamide (T2EHDGA) in n-dodecane. Flowsheet calculations and evaluation of the results were done using the Argonne’s Model for Universal Solvent Extraction (AMUSE) code using single-stage distribution data. The co-extraction of Zr(IV) and Pd(II) was prevented using CDTA (trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid) as a masking agent in the feed. For the scrubbing of co-extracted Mo; citrate-buffered acetohydroxamic acid was used. The separation of An(III) from the trivalent lanthanides (Ln(III)) was achieved using citrate-buffered diethylene-triamine-N,N,N′,N″,N″-pentaacetic acid (DTPA), and Ln(III) were efficiently back extracted using N,N,N′,N′-tetraethyl-diglycolamide (TEDGA). A clean An(III) product was obtained with a recovery of 95% americium and curium. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000125409
Veröffentlicht am 17.02.2021
Originalveröffentlichung
DOI: 10.3390/app10207217
Scopus
Zitationen: 4
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2020
Sprache Englisch
Identifikator ISSN: 2076-3417
KITopen-ID: 1000125409
Erschienen in Applied Sciences
Verlag MDPI
Band 10
Heft 20
Seiten Art.-Nr. 7217
Bemerkung zur Veröffentlichung This article belongs to the Special Issue Nuclear Wastes Management
Vorab online veröffentlicht am 16.10.2020
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Scopus
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