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Effect of Anti‐Encrustation Additives on Zirconium Molybdate Hydrate
Author(s) -
Abe Risako,
Hirasawa Izumi,
Miyazaki Yasunori,
Takeuchi Masayuki
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900638
Subject(s) - zirconium , molybdenum , molybdate , chemistry , inorganic chemistry , reagent , nitric acid , hydrate , crystallization , tellurium , fission products , nuclear chemistry , radiochemistry , organic chemistry
Anti‐encrustation additives were mainly investigated in nitric acid solution with zirconium (Zr), molybdenum (Mo), and tellurium (Te) to prevent the encrustation of zirconium molybdate hydrate (ZMH). The ZMH generated by reaction crystallization of Mo and Zr as main fission products has a high adhesion property in spent nuclear fuel reprocessing. In addition, it is reported that Te, which is also one of the fission products, precipitates together with ZMH. Encrustation of precipitates containing Te was effectively prevented by adding molybdenum trioxide (MoO 3 ) crystals as an anti‐encrustation reagent. The encrustation amount was found to be larger than that under the condition of only Zr and Mo without Te. Consequently, it was suggested that the high adhesion property of Te affected the encrustation amount of ZMH.