{"title":"Preparation of homogeneous LiF-BeF2-ZrF4 molten salt with low oxygen content","authors":"Yulong Song, Miao Shen, Jing Yang, Ling Han, Rui Tang, Sufang Zhao, Yuan Qian","doi":"10.1016/j.jfluchem.2024.110254","DOIUrl":null,"url":null,"abstract":"<div><p>Molten salt reactor uses LiF-BeF<sub>2</sub>-ZrF<sub>4</sub> (FLiBeZr) as the solvent, and UF<sub>4</sub> is dissolved in homogeneous FLiBeZr to form liquid fuel salt (FLiBeZrU). However, a second phase ZrO<sub>2</sub> precipitate usually forms during the preparation of FLiBeZr solvent. In this paper, the formation mechanism of ZrO<sub>2</sub>, its dissolution equilibrium in FLiBeZr and its effect on the physical properties of molten salts were studied. Then, anhydrous HF-H<sub>2</sub> gas was introduced as a deoxidizer to react with the dissolved oxide and ZrO<sub>2</sub>. By optimizing the H<sub>2<img></sub>HF tube bubbling at the bottom, even with the addition of UF<sub>4</sub>, a uniform FLiBeZr with a total oxygen content of 120 ppm can be prepared without the production of UO<sub>2</sub>.</p></div>","PeriodicalId":357,"journal":{"name":"Journal of Fluorine Chemistry","volume":"274 ","pages":"Article 110254"},"PeriodicalIF":1.9000,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fluorine Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022113924000150","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Molten salt reactor uses LiF-BeF2-ZrF4 (FLiBeZr) as the solvent, and UF4 is dissolved in homogeneous FLiBeZr to form liquid fuel salt (FLiBeZrU). However, a second phase ZrO2 precipitate usually forms during the preparation of FLiBeZr solvent. In this paper, the formation mechanism of ZrO2, its dissolution equilibrium in FLiBeZr and its effect on the physical properties of molten salts were studied. Then, anhydrous HF-H2 gas was introduced as a deoxidizer to react with the dissolved oxide and ZrO2. By optimizing the H2HF tube bubbling at the bottom, even with the addition of UF4, a uniform FLiBeZr with a total oxygen content of 120 ppm can be prepared without the production of UO2.
期刊介绍：
The Journal of Fluorine Chemistry contains reviews, original papers and short communications. The journal covers all aspects of pure and applied research on the chemistry as well as on the applications of fluorine, and of compounds or materials where fluorine exercises significant effects. This can include all chemistry research areas (inorganic, organic, organometallic, macromolecular and physical chemistry) but also includes papers on biological/biochemical related aspects of Fluorine chemistry as well as medicinal, agrochemical and pharmacological research. The Journal of Fluorine Chemistry also publishes environmental and industrial papers dealing with aspects of Fluorine chemistry on energy and material sciences. Preparative and physico-chemical investigations as well as theoretical, structural and mechanistic aspects are covered. The Journal, however, does not accept work of purely routine nature.
For reviews and special issues on particular topics of fluorine chemistry or from selected symposia, please contact the Regional Editors for further details.
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