This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1080/07366299.2014.952532 in citations.
Laboratory-scale Counter-Current Centrifugal Contactor Demonstration of an innovative-SANEX Process Using a Water Soluble BTP
Laboratory-scale Counter-Current Centrifugal Contactor Demonstration of an innovative-SANEX Process Using a Water Soluble BTP
In this paper the development and laboratory-scale demonstration of a novel “innovative-SANEX” process using annular centrifugal contactors is presented. In this strategy, a solvent comprising the TODGA extractant with addition of 5 vol.-% 1-octanol showed very good extraction efficiency of Am(III)...
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Personal Name(s): | Wilden, Andreas (Corresponding Author) |
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Modolo, Giuseppe / Kaufholz, Peter / Sadowski, Fabian / Lange, Steve / Sypula, Michal / Magnusson, Daniel / Müllich, Udo / Geist, Andreas / Bosbach, Dirk | |
Contributing Institute: |
Nukleare Entsorgung; IEK-6 |
Published in: | Solvent extraction and ion exchange, 33 (2015) 2, S. 91-108 |
Imprint: |
Philadelphia, PA
Taylor & Francis
2015
|
DOI: |
10.1080/07366299.2014.952532 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Nuclear Waste Management |
Publikationsportal JuSER |
In this paper the development and laboratory-scale demonstration of a novel “innovative-SANEX” process using annular centrifugal contactors is presented. In this strategy, a solvent comprising the TODGA extractant with addition of 5 vol.-% 1-octanol showed very good extraction efficiency of Am(III) and Cm(III) together with the trivalent lanthanides (Ln(III)) from simulated PUREX raffinate solution without 3rd phase formation. CDTA (cyclohexanediaminetetraacetic acid) was used as masking agent to prevent the co-extraction of Zr and Pd. An(III) and Ln(III) were co-extracted from simulated PUREX raffinate, and the loaded solvent was subjected to several stripping steps.The An(III) were selectively stripped using the hydrophilic complexing agent SO3-Ph-BTP (2,6-bis(5,6-di(sulfophenyl)-1,2,4-triazin-3-yl)pyridine). For the subsequent stripping of the Ln(III), a citric acid based solution was used.A 32-stage process flow-sheet was designed using computer-code calculations and tested in annular miniature centrifugal contactors in counter-current mode. The innovative SANEX process showed excellent performance for the recovery of An(III) from simulated HAR solution and separation from the fission and activation products. ≥99.8% An(III) were recovered with only low impurities (0.4% Ru, 0.3% Sr, 0.1% Ln(III)). The separation from the Ln(III) was excellent and the Ln(III) were efficiently stripped by the citrate-based stripping solution. The only major contaminant in the spent solvent was Ru, with 14.7% of the initial amount being found in the spent solvent. Solvent cleaning and recycling therefore has to be further investigated.This successful spiked test demonstrated the possibility of separating An(III) directly from HAR solution in a single cycle which is a great improvement over the former multi-cycle strategy. The results of this test are presented and discussed. |