Studies on the aqueous synthesis process of anhydrous uranyl chloride by U3O8, hydrochloric acid and H2O2

Li, Yuhe; Lei, Qi; Xiong, Zhixin; Huang, Wei; Li, Qingnuan

doi:10.1007/s10967-021-08124-w

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…z E-mail: huangwei@sinap.ac.cn; liqingnuan@sinap.ac.cn Experimental Method U 3 O 8 was dissolved in a mixture of hydrochloric acid and hydrogen peroxide at 90 °C, the fully reacted solution was evaporated and crystallized, and then dried in two steps to obtain anhydrous uranyl chloride (the detailed preparation process of anhydrous uranyl chloride was shown in our previous work 26 ). All electrochemical experiments were performed in an argon atmosphere glove box, and the container was a cylindrical corundum crucible (Φ 50 × 60 mm).…”

Section: Methodsmentioning

confidence: 99%

Studies on the Electrodeposition of UO₂ Production in UO₂Cl₂-LiCl-KCl Melt

Wei

2022

J. Electrochem. Soc.

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UO2 is an important nuclear fuel, and also has potentials in the field of functional materials. In this work, the electrochemical behavior of UO2 2+ in LiCl-KCl molten salt was studied, and its electrochemical reduction process and reduction potential were confirmed. The electrolytic product of UO2 2+ was UO2 crystal. The reduction potential was found playing a decisive role in the morphology of cathodic products, and when the potential was ≤-0.4 V (vs. Pt(II)/Pt), dendritic and cracked characteristic of the UO2 crystal appeared. The average current density had a positive correlation with the grain size of cathodic products, and it increased first and then decreased with the increase of reduction potential, having a maximum at -0.6 V (vs. Pt(II)/Pt). On the other hand, the uranyl concentration also had a positive correlation with the grain size of the cathodic product without changing the integrity of grain morphology. For the preparation of large and granular UO2 crystal, the reduction potential of -0.2~-0.3 V (vs. Pt(II)/Pt), as well as the uranyl concentration of greater than 2.0 wt% were recommended, and UO2 crystal with average grain size greater than 500 μm and high uniformity could be finally obtained.

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Section: Methodsmentioning

confidence: 99%

Studies on the Electrodeposition of UO₂ Production in UO₂Cl₂-LiCl-KCl Melt

Wei

2022

J. Electrochem. Soc.

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“…Figure 1 shows the XRD analysis of the obtained anhydrous uranyl chloride, which shows the diffraction signal of uranyl chloride with no other impurity peaks. 17,36 Figure 2 shows the EAS results of the obtained uranyl chloride, and it can also be found that there is no significant signal other than the absorption band of U VI at 440 nm, 33 which further proves that the purity of the prepared uranyl chloride is reliable and can be used for subsequent electrolysis experiments.…”

Section: Resultsmentioning

confidence: 73%

“…The specific preparation process of anhydrous uranyl chloride is as follows. 36 First, UO 2 (laboratory inventory) was put in muffle furnace in air atmosphere and heated for 12 h at 873 K to convert it to U 3 O 8 . Then, the beaker containing U 3 O 8 was put on the electric heating plate in the fume hood, and then slowly added concentrated hydrogen peroxide and hydrochloric acid sequentially (Eq.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Behavior and Reduction of UO22+ in LiCl-KCl Molten Salt

Wang,

Liu,

Zhong

et al. 2023

J. Electrochem. Soc.

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In this work, we explored the electrochemical behavior and reduction process of uranyl ions UO22+ in molten LiCl-KCl eutectic at 773 K. Cyclic voltammetry (CV) and square wave voltammetry (SWV) results showed that the reduction of UO22+ ions on the inert W electrode was a three-step process: (1) UO22+ + e- ↔ UO2+, (2) UO2+ + e- ↔ UO2 and (3) UO2 + 4e- ↔ U. Electrolysis experiments further confirmed this reduction mechanism that UO22+ ions were reduced to UO2 on the molybdenum electrode by applying a constant potential of -1.00 V vs. Ag/AgCl and subsequently to uranium metal at a more negative potential of -2.35 V vs. Ag/AgCl. In addition, UO22+ ions could be thoroughly reduced to uranium metal through a 4-h constant current electrolysis at -18 mA cm-2. Electronic absorption spectroscopy (EAS) and inductively coupled plasma optical emission spectroscopy (ICP-OES) respectively illustrated that the oxidation state of uranium was unchanged and uranium concentration gradually decreased during the electrolysis. Finally, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the phase composition and microstructure of deposited products. Nano-sized UO2 and U metal particles were successfully obtained by constant potential and current electrolysis.

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“…[ 2,5,6 ] Generally, square and circular thin‐walled tubes are preferred in terms of energy absorption under impact loading due to their excellent crashworthiness characteristics, low economic costs, convenience, and accessibility. [ 7,8 ] As structure complexity and crashworthiness requirements increase, hybrid structures with simple configurations are becoming the focus of research. Filling thin‐walled tubes with aluminum foam can be a more effective method, as the interaction between the tube and foam can absorb additional energy.…”

Section: Introductionmentioning

confidence: 99%

Multiple Crashworthiness Evaluation of Double‐V Negative Poisson's Ratio‐Filled Square Tube Under Axial Impact

Sun

Zhou

Zhang

et al. 2022

Physica Status Solidi (b)

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Thin‐walled structures are used extensively in the passive safety of vehicles to absorb energy. The thin‐walled tube is already a traditional structure with excellent energy absorption. Negative Poisson's ratio (NPR) structures produce an inward concentration to increase the stiffness of the structure during axial compression. The concept of fluctuation of crushing force (FoCF) is introduced herein to evaluate this new energy‐absorbing box as an energy‐absorbing device based on the traditional energy absorption evaluation index. Based on experimental validation, a finite‐element model is developed that can accurately predict the crashworthiness of the double‐V NPR‐filled square tube (DVFST). The following parameters, such as out‐of‐plane thickness, meta‐cell half‐width beam thickness, and beam angle tube thickness, are conducted to assess the crashworthiness of the DVFST structure. The first thing that should be considered in the design of the DVFST structure is the half‐width of the cell, followed by the angle of the long beam, and then the relative wall thickness of the long and short beams. The DVFST structure has the potential to become an excellent energy‐absorbing device by adjusting its parameters.

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Studies on the aqueous synthesis process of anhydrous uranyl chloride by U3O8, hydrochloric acid and H2O2

Cited by 3 publications

References 23 publications

Studies on the Electrodeposition of UO₂ Production in UO₂Cl₂-LiCl-KCl Melt

Studies on the Electrodeposition of UO₂ Production in UO₂Cl₂-LiCl-KCl Melt

Electrochemical Behavior and Reduction of UO22+ in LiCl-KCl Molten Salt

Multiple Crashworthiness Evaluation of Double‐V Negative Poisson's Ratio‐Filled Square Tube Under Axial Impact

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Studies on the aqueous synthesis process of anhydrous uranyl chloride by U3O8, hydrochloric acid and H2O2

Cited by 3 publications

References 23 publications

Studies on the Electrodeposition of UO2 Production in UO2Cl2-LiCl-KCl Melt

Studies on the Electrodeposition of UO2 Production in UO2Cl2-LiCl-KCl Melt

Electrochemical Behavior and Reduction of UO22+ in LiCl-KCl Molten Salt

Multiple Crashworthiness Evaluation of Double‐V Negative Poisson's Ratio‐Filled Square Tube Under Axial Impact

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Studies on the Electrodeposition of UO₂ Production in UO₂Cl₂-LiCl-KCl Melt

Studies on the Electrodeposition of UO₂ Production in UO₂Cl₂-LiCl-KCl Melt