Toward optimisation of electrolytic reduction of solid chromium oxide to chromium powder in molten chloride salts
Toward optimisation of electrolytic reduction of solid chromium oxide to chromium powder in molten chloride salts
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DOI：
10.1016/j.electacta.2003.12.045
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发表时间：
2004-05-30
影响因子：
6.6
通讯作者：
Fray, DJ
中科院分区：
文献类型：
--
作者：
Gordo, E;Chen, GZ;Fray, DJ
研究了固体Cr_2O_3在CaCl_2和NaCl等摩尔混合溶液中的电化学还原反应。研究了球团制备条件、槽电压和温度对还原过程的影响。分析了不同条件下恒压电解的电流-时间曲线特征、固体Cr_2O_3在CaCl_2和NaCl等摩尔混合液中的循环伏安曲线、还原球团的微观结构和元素组成。特别是，注意到了电解的中间产物，各种化学计量的铬酸钙，旨在实现更好地理解和优化的还原过程。(C)2004 Elsevier Ltd.保留所有权利。
Electrochemical reduction of solid Cr2O3, in the form of an assembled cathode of porous pellets attached to a current collector, to chromium powder was investigated in molten CaCl2 and a molten equimolar mixture of CaCl2 and NaCl. The study focused on the influence of pellets preparation conditions, cell voltages and temperatures on the reduction process. Analyses were reported of the characteristics of the current-time plots of the constant voltage electrolysis under different conditions, cyclic voltammograms of solid Cr2O3 in the molten equimolar mixture of CaCl2 and NaCl, the microstructures and elemental compositions of the reduced pellets. Particularly, attention was given to the intermediate product of the electrolysis, calcium chromites of various stoichiometries, aiming to achieve a better understanding and optimisation of the reduction process. (C) 2004 Elsevier Ltd. All rights reserved.