| 在超临界二氧化碳中用TBP-HN03络合剂反应萃取Nd203中Nd的动力学 |
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| 引用本文： | 朱礼洋,段五华,徐景明,朱永贝睿.在超临界二氧化碳中用TBP-HN03络合剂反应萃取Nd203中Nd的动力学[J].中国化学工程学报,2009,17(2):214-218. |
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| 作者姓名： | 朱礼洋 段五华 徐景明 朱永贝睿 |
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| 作者单位： | Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 102201, China |
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| 摘 要： | The process based on supercritical fluid extraction for reprocessing of the spent nuclear fuel has some remarkable advantages over the plutonium-uranium extraction (PUREX) process. Especially, it can minimize the generation of secondary waste. Dynamic reactive extraction of neodymium oxide (Nd2O3) in supercritical carbon dioxide (SC-CO2) containing tri-n-butyl phosphate-nitric acid (TBP-HNO3) complex was investigated. Temperature showed a positive effect on the extraction efficiency, while pressure showed a negative effect when the unsaturated TBP-HNO3 complex was employed for the dynamic reactive extraction of Nd2O3 in SC-CO2. Both temperature and pressure effects indicated that the kinetic process of the reactive extraction was controlled by the chemical reaction. A kinetic model was proposed to describe the extraction process.
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| 关 键 词： | supercritical carbon dioxide kinetics reactive extraction TBP-HNO3 complex Nd2O3 |
| 收稿时间： | 2008-8-26 |
| 修稿时间： | 2008-8-26
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Kinetics of reactive extraction of Nd from nd203 with tbp-hno3 complex in supercritical carbon dioxide |
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| ZHULiyang,DUAN Wuhua,XU Jingming,ZHU Yongjun.Kinetics of reactive extraction of Nd from nd203 with tbp-hno3 complex in supercritical carbon dioxide[J].Chinese Journal of Chemical Engineering,2009,17(2):214-218. |
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| Authors: | ZHULiyang DUAN Wuhua XU Jingming ZHU Yongjun |
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| Affiliation: | Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 102201, China |
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| Abstract: | The process based on supercritical fluid extraction for reprocessing of the spent nuclear fuel has some remarkable advantages over the plutonium-uranium extraction (PUREX) process. Especially, it can minimize the generation of secondary waste. Dynamic reactive extraction of neodymium oxide (Nd2O3) in supercritical carbon dioxide (SC-CO2) containing tri-n-butyl phosphate-nitric acid (TBP-HNO3) complex was investigated. Temperature showed a positive effect on the extraction efficiency, while pressure showed a negative effect when the unsaturated TBP-HNO3 complex was employed for the dynamic reactive extraction of Nd2O3 in SC-CO2. Both temperature and pressure effects indicated that the kinetic process of the reactive extraction was controlled by the chemical reaction. A kinetic model was proposed to describe the extraction process. |
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| Keywords: | supercritical carbon dioxide kinetics reactive extraction TBP-HNO3 complex Nd2O3 |
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