Design of MA(III)/Ln(III) separation process of extraction chromatography technology

Akuzawa, Tadashi; Kim, Seong Yun; Kubota, Mamoru; Wu, Hao; Watanabe, Sou; Sano, Yuchi; Takeuchi, Masayuki; Arai, Tsuyoshi

doi:10.1007/s10967-022-08658-7

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…Hexaoctyl-nitrilotriacetamide (HONTA) impregnated adsorbents are used for the 2nd columns owing to its selectivity for MA(III) (Sasaki et al, 2013) and excellent adsorption/desorption performance of the HONTA impregnated adsorbent (Takeuchi et al, 2019;Watanabe et al, 2018b). Our preliminary experiments showed that selective MA(III) recovery is possible even though several modifications have to be made in the process flow for more efficient separation (Akuzawa et al, 2022). In the previous phase, CMPO and HDEHP have been used for MA(III)+RE(III) co-recovery and MA(III)/RE(III) separation, respectively (Watanabe et al, 2018a;Watanabe et al, 2019a).…”

Section: Overview Of the Process Flowmentioning

confidence: 90%

Overview of development program for engineering scale extraction chromatography MA(III) recovery system

WATANABE,

TAKAHATAKE,

HASEGAWA

et al. 2024

Mechanical Engineering Journal

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Japan Atomic Energy Agency is developing extraction chromatography technology to recover MA(III) from spent nuclear fuel. Developments in the extraction chromatography system especially focusing on safety and stable operation are required for practical application of the technology. This paper discusses the main tasks that have to be challenged preferentially based on achievements obtained by previous studies and potential MA(III) recovery process flow. For the safety assessment, removal of fine particles, optimization in adsorbent for a reduction in pressure drop of the column, degradation behavior of the adsorbents, and recycling of the adsorbents are topics for development. Enhancement in resistance against radiation and acid of material in pump and development of automated operation system is required to maintain product quality during long time operation. Those studies are carried out simultaneously in a research project of 2019-2024, and new technologies such as a filter with porous media, porous adsorbents for low-pressure drop column, used adsorbent recycling, radiation resistant pump, and automated valve switching system using online analysis are developed in this project. A demonstration of the total system with a large-scale apparatus will be carried out at the end of the project.

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