Dissolution Extraction of Uranium Oxides and Cerium Oxide with TBP-HNO3 Complex in Supercritical CO2

被引：6

作者：

Duan, Wuhua ^{[1
]}

Zhu, Liyang ^{[1
]}

Zhu, Yongjun ^{[1
]}

Xu, Jingming ^{[1
]}

机构：

[1] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 102201, Peoples R China

来源：

ATALANTE 2012 INTERNATIONAL CONFERENCE ON NUCLEAR CHEMISTRY FOR SUSTAINABLE FUEL CYCLES | 2012年 / 7卷

关键词：

Dissolution extraction; Supercritical CO2; Uranium oxide; Cerium oxide; TBP-HNO3; complex; FLUID EXTRACTION; RECOVERY;

D O I：

10.1016/j.proche.2012.10.031

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Dissolution extraction of uranium oxides, CeO2 and (U, Ce)O-2 solid solution with TBP-HNO3 complex in supercritical CO2 (SC-CO2) was investigated. It is difficult to dissolve and extract directly UO2 pellets and CeO2 with TBP-HNO3 complex in SC-CO2. After UO2 pellets spontaneously turns into U3O8 powders under O-2 flow and 600 degrees C, the extraction efficiency can reach more than 98%. For dissolution extraction of (U, Ce)O-2 solid solution with TBP-HNO3 complex in SC-CO2 under 60 square and 20 MPa, the extraction efficiency of U and Ce is 98.61% and 98.1% respectively. (C) 2012 Elsevier B.V ... Selection and/or peer-review under responsibility of the Chairman of the ATALANTE 2012 Program Committee

引用

页码：184 / 190

页数：7

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