Effect of Anti-Encrustation Additives on Zirconium Molybdate Hydrate

Risako Abe, Izumi Hirasawa, Yasunori Miyazaki, Masayuki Takeuchi

Research output: Contribution to journalArticlepeer-review

Abstract

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 (MoO3) 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.

Original languageEnglish
Pages (from-to)1059-1064
Number of pages6
JournalChemical Engineering and Technology
Volume43
Issue number6
DOIs
Publication statusPublished - 2020 Jun 1

Keywords

  • Anti-encrustation additives
  • Molybdenum trioxide
  • Reaction crystallization
  • Zirconium molybdate hydrate

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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