Electrolytic Extraction of Ce from NaCl-KCl Molten Salt |
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Authors: | ZHANG Lei LIN Rushan CHEN Hui XIAO Yiqun HE Hui |
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Affiliation: | Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China |
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Abstract: | In order to optimize the technological conditions of cerium preparation by electrolytic reduction of molten salt, the electrochemical behavior of CeCl3 in NaCl-KCl molten salt and the electrodeposition process on Mo electrode were carried out. The results indicate that Ce3+ can be quickly electrolyzed at the cathode potential more than 1.9 V (vs. Ag/AgCl) using Mo rod (ø4 mm). Increasing the concentration of Ce3+ is beneficial to the electrolytic reaction. The optimal electrolytic voltage is determined to be 4.41 V using two-electrode system, and the cathode potential is 2.27 V (vs. Ag/AgCl). It is found that the voltage increases with the decrease of cathode area when the anode area is fixed, and the cathode area is changed. Under the experimental conditions, the voltage varies linearly with the electrode center distance. Compared with the change of electrode center distance, the effect of current change on voltage is more significant. |
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Keywords: | chloride melten salt cerium electrochemical behavior electrolysis process |
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