Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 287: Issue 2
Conversion of neodymium oxide with N2O4 into nitrate followed by supercritical fluid extraction of nitrate
Authors:
L. Zhu Institute of Nuclear and New Energy Technology, Tsinghua University, 102201 Beijing, China

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W. Duan Institute of Nuclear and New Energy Technology, Tsinghua University, 102201 Beijing, China

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J. Xu Institute of Nuclear and New Energy Technology, Tsinghua University, 102201 Beijing, China

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Y. Zhu Institute of Nuclear and New Energy Technology, Tsinghua University, 102201 Beijing, China

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Pages:
443–448
Online Publication Date:
18 Aug 2010
Publication Date:
01 Feb 2011
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10967-010-0701-7
Keywords:
Dinitrogen tetraoxide; Neodymium oxide; Conversion; Nitrate; Supercritical fluid extraction
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Abstract  

A novel method that spent nuclear fuel is converted into nitrates with N2O4, and then nitrates are extracted with TBP in supercritical CO2 (SC-CO2), has been developed for reprocessing of spent nuclear fuel, which has a potential prospect because of its potential to decrease generation of the secondary liquid waste. In this paper, conversion of Nd2O3 with N2O4 into its nitrate under various conditions and extraction of the conversion product with TBP in SC-CO2 were investigated. When temperature was 60–120 °C, the molar ratio of H2O to Nd2O3 was from 1 to 6, and molar ratio of N2O4 to Nd2O3 was above 8, complete conversion of Nd2O3 into its nitrate was achieved. The conversion product was characterized by thermal analysis (TG-DTA), X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR) and Raman spectroscopy. Quantitative extraction of the conversion product with TBP in supercritical CO2 was also achieved under experimental conditions.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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