کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6602914 | 1424082 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct separation of uranium from lanthanides (La, Nd, Ce, Sm) in oxide mixture in LiCl-KCl eutectic melt
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper reports the direct separation of U from lanthanides (Ln) in oxide mixtures in LiCl-KCl eutectic, a method that could simplify the pyrometallurgical reprocessing of UO2-based spent fuels. In the melt, the mixture of UO2 and lanthanide oxides (Ln2O3/LnO2) was chloridized by AlCl3, and then U was selectively recovered by forming U-Al alloys through the redox reactions of U(IV)/U(III) and U(III)/AlxU. The results showed that U could be efficiently separated from lanthanides with high separation factors (SFU/Laâ¯=â¯1.1â¯Ãâ¯104, SFU/Ceâ¯=â¯1.6â¯Ãâ¯105, and SFU/Smâ¯=â¯2.5â¯Ãâ¯104). X-ray diffraction analysis indicated the predominant separation products to be Al3U and Al4U, whereas the real extraction rate of U was probably affected by trace amounts of O2â in the melt. For the first time, single-cell operation to separate U from Ln in mixed oxides is shown to be feasible by using AlCl3 as chlorination agent followed by electrodeposition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 275, 10 June 2018, Pages 100-109
Journal: Electrochimica Acta - Volume 275, 10 June 2018, Pages 100-109
نویسندگان
Yalan Liu, Kui Liu, Lixia Luo, Liyong Yuan, Zhifang Chai, Weiqun Shi,