V<sub>2</sub>O<sub>5</sub>在NaCl-KCl-NaF熔盐体系中溶解度及溶解机理

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V₂O₅在NaCl-KCl-NaF熔盐体系中溶解度及溶解机理

基金项目:

国家自然科学基金(项目编号:51274082)

College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China

摘要: 利用等温饱和法分别研究温度和熔盐组分对V₂O₅在NaCl-KCl-Na F熔盐体系中溶解度的影响。并利用热力学软件Factsage7.0对熔盐体系各组分之间可能发生的化学反应进行计算,着重结合X射线衍射对熔盐急冷试样进行分析,确定了V₂O₅的溶解机理。结果表明:在该熔盐体系中V₂O₅优先与Na F发生反应,其溶解机理为4V₂O₅+6NaF=6NaVO₃+2VF₃+O₂;V₂O₅的溶解度随温度的升高而增大,随组元NaF摩尔分数的增大而增大。
- V₂O₅ /
- NaCl-KCl-NaF /
- 溶解度 /
- 溶解机理
Abstract: The influence of temperature and molten salt component on the solubility of V₂O₅ in Na Cl-KCl-NaF molten salt system was researched by isothermal saturation method.The possible reactions between the materials in the molten salt system were calculated by using the thermodynamic software Factsage7.0,and the dissolution mechanism of V₂O₅ was finally determined by combination with the X-ray diffraction analysis of the rapid cooling samples of molten salt.The results show that V₂O₅ preferentially reacts with NaF in the molten salt system by the following dissolving mechanism of 4V₂O₅+ 6NaF=6NaVO₃+2VF₃+O₂.The solubility of V₂O₅ increases with increase in temperature and NaF content in the molten salt system.
- V₂O₅ /
- NaCl-KCl-NaF /
- solubility /
- dissolving mechanism