Investigation of the Sorption of NdF3, LaF3 and ThF4 under Dynamic Conditions in the LiF–NaF–KF–Activated Carbon System

封面

如何引用文章

全文:

开放存取 开放存取
受限制的访问 ##reader.subscriptionAccessGranted##
受限制的访问 订阅存取

详细

The sorption of neodymium, lanthanum, and thorium fluorides from a melt under dynamic conditions using AG-3 activated carbon at a temperature of 650°C was studied for the first time. The well-known eutectic mixture of alkali metal fluorides LiF–NaF–KF was used as the melt. To conduct the experiments, a special installation was developed and manufactured to study the sorption process under dynamic conditions as applied to melts. During the sorption of neodymium and lanthanum fluorides, three main zones are identified: the sorption front formation zone and the sorption and slip zones. It is shown that, under the conditions considered, it is possible to purify thorium fluoride to remove lanthanum fluoride. The maximum value of the sorption capacity for lanthanum fluoride reached more than 5 mg/g and depended on the melt flow rate through the activated carbon zone. Thorium fluoride was not sorbed with activated carbon under the studied conditions studied.

全文:

受限制的访问

作者简介

Yu. Fedorov

St. Petersburg State Institute of Technology (Technical University)

编辑信件的主要联系方式.
Email: fys54@mail.ru
俄罗斯联邦, Moskovskii pr. 26, St. Petersburg, 190013

V. Samonin

St. Petersburg State Institute of Technology (Technical University)

Email: fys54@mail.ru
俄罗斯联邦, Moskovskii pr. 26, St. Petersburg, 190013

A. Zotov

St. Petersburg State Institute of Technology (Technical University)

Email: fys54@mail.ru
俄罗斯联邦, Moskovskii pr. 26, St. Petersburg, 190013

参考

  1. Велихов Е.П., Ковальчук М.В., Ильгисонис В.И., Игнатьев В.В., Цибульский В.Ф., Андрианова Е.А. // Энергетическая политика. 2017. № 3. С. 12.
  2. Velikhov E.P., Kovalchuk M.V., Azitov E.A., Ignatiev V.V., Subbotin S.A., Tsibulskiy V.F. // At. Energy. 2013. Vol. 114. N 3. P. 193. https://doi.org/10.1007/s10512-013-9695-x
  3. Велихов Е.П., Азизов Э.А., Алексеев П.Н. Гуревич М.И., Субботин С.А., Шимкевич А.Л. // Вопр. атом. науки и техники. Сер.: Термоядерный синтез. 2013. Т. 36. № 1. С. 16.
  4. https://ru.readkong.com/page/koncepciya-zelyonoy-yadernoy-energetiki-concept-of-green-2177596
  5. Molten Salt Reactors and Thorium Energy. Second Edition / Ed. T.J. Dolan. Elsevier, 2024. 1038 p.
  6. Fedorov Yu.S., Samonin V.V., Zotov A.A., Khrylova E.D., Spiridonova E.A., Miroslavov A.E., Akatov A.A. // Radiochemistry. 2021. Vol. 63. N 6. P. 754. https://doi.org/10.31857/S0033831121060046
  7. Fedorov Yu.S., Samonin V.V., Zotov A.A., Khrylova E.D., Spiridonova E.A., Miroslavov A.E., Akatov A.A. // Radiochemistry. 2022. Vol. 64. N 3. P. 241. https://doi.org/10.31857/S0033831122030066
  8. Fedorov Yu.S., Samonin V.V., Zotov A.A., Khrylova E.D., Spiridonova E.A., Miroslavov A.E., Akatov A.A. // Radiochemistry. 2022. Vol. 64. N 6. P. 561. https://doi.org/10.1134/S1066362222030079
  9. Саввин С.Б. Органические реагенты группы арсеназо III.М.: Атомиздат, 1971. 348 с.
  10. Дьяченко А.Н., Шагалов В.В. Химическая кинетика гетерогенных процессов. Томск: Изд. Томск. политех. ун-та, 2014. 102 с.

补充文件

附件文件
动作
1. JATS XML
下载
2. Fig. 1. - Schematic diagram of the installation for the dynamics of sorption in the melt of salt fluorides. 1 - steel outer casing, 2 - lower reactor cover, 3 - graphite flask, 4 - lower die, 5 - upper die, 6 - melt container, 7 - thermocouple shell, 8 - inert gas supply tap, 9 - air evacuation tap, 10 - melt, 11 - sorbent, 12 - heater.

下载 (202KB)
索引源数据
3. Fig. 2. Output curve of neodymium fluoride from the melt after its passage through active carbon. The height of the charcoal layer is 10 cm. The dotted curve is the initial concentration of neodymium fluoride (2.1 mg/g) in the LiF-NaF-KF eutectic. Here and further in the figure min without a point

下载 (163KB)
索引源数据
4. Fig. 3. Output curve of lanthanum fluoride from the melt during sorption on active carbon. The dotted curve is the initial concentration of lanthanum fluoride (3.2 mg/g) in LiF-NaF-KF eutectic. The height of the charcoal layer is 8.0 cm.

下载 (129KB)
索引源数据
5. Fig. 4 - Extraction rate of lanthanum fluoride by activated carbon during sorption under dynamic conditions for a carbon layer height of 10 cm.

下载 (146KB)
索引源数据
6. Fig. 5. Output sorption curves of lanthanum and thorium fluorides. Dotted curve - initial concentration of lanthanum and thorium fluorides in LiF-NaF-KF eutectic. Initial concentrations of lanthanum fluoride, mg/g: 1 - 5.1 (experiment 4 in Table 1), 2 - 5.0 (experiment 6 in Table 1). Initial concentrations of thorium fluoride, mg/g: 3 - 8.0 (experiment 4 in Table 1), 4 - 8.1 (experiment 6 in Table 1.) A-F: see text for explanation.

下载 (141KB)
索引源数据
7. Fig. 6. Dependence of pre-slip sorption capacity on FLiNaK flow rate.

下载 (130KB)
索引源数据

版权所有 © Russian Academy of Sciences, 2024