SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (5): 671-676.DOI: 10.1016/j.cjche.2016.01.006

• 第25届中国过程控制会议专栏 • 上一篇    

Thermodynamic analysis on the direct preparation of metallic vanadium from NaVO3 by molten salt electrolysis

WeiWeng1, Mingyong Wang2, Xuzhong Gong2, ZhiWang2, Zhancheng Guo1   

  1. 1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
    2 National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2015-06-30 修回日期:2015-12-15 出版日期:2016-05-28 发布日期:2016-06-14
  • 通讯作者: Mingyong Wang
  • 基金资助:

    Supported by the National Basic Research Program of China (2013CB632606), the National Natural Science Foundation of China (51474200) and the Youth Innovation Promotion Association, CAS (2015036).

Thermodynamic analysis on the direct preparation of metallic vanadium from NaVO3 by molten salt electrolysis

WeiWeng1, Mingyong Wang2, Xuzhong Gong2, ZhiWang2, Zhancheng Guo1   

  1. 1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
    2 National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2015-06-30 Revised:2015-12-15 Online:2016-05-28 Published:2016-06-14
  • Contact: Mingyong Wang
  • Supported by:

    Supported by the National Basic Research Program of China (2013CB632606), the National Natural Science Foundation of China (51474200) and the Youth Innovation Promotion Association, CAS (2015036).

摘要: A novel and environmentally friendly route to directly prepare metallic vanadium from NaVO3 by molten salt electrolysis is proposed. The feasibility about the direct electro-reduction of NaVO3 to metallic vanadium is analyzed based on the thermodynamic calculations and experimental verifications. The theoretical decomposition voltage of NaVO3 to metallic vanadium is only 0.47 V at 800℃ and much lower than that of the alkali and alkali earth metal chloride salts. The value is slightly higher than that of low-valence vanadium oxides such as V2O3, V3O5 and VO. However, the low-valence vanadium oxides can be further electro-reduced to metallic vanadium thermodynamically. The thermodynamic analysis is verified by the experimental results. The direct preparation of metallic vanadium from NaVO3 by molten salt electrolysis is feasible.

关键词: Molten salt electrolysis, NaVO3, Thermodynamic analysis, Metallic vanadium, Decomposition voltage

Abstract: A novel and environmentally friendly route to directly prepare metallic vanadium from NaVO3 by molten salt electrolysis is proposed. The feasibility about the direct electro-reduction of NaVO3 to metallic vanadium is analyzed based on the thermodynamic calculations and experimental verifications. The theoretical decomposition voltage of NaVO3 to metallic vanadium is only 0.47 V at 800℃ and much lower than that of the alkali and alkali earth metal chloride salts. The value is slightly higher than that of low-valence vanadium oxides such as V2O3, V3O5 and VO. However, the low-valence vanadium oxides can be further electro-reduced to metallic vanadium thermodynamically. The thermodynamic analysis is verified by the experimental results. The direct preparation of metallic vanadium from NaVO3 by molten salt electrolysis is feasible.

Key words: Molten salt electrolysis, NaVO3, Thermodynamic analysis, Metallic vanadium, Decomposition voltage