Browse > Article
http://dx.doi.org/10.9713/kcer.2012.50.6.939

Electrochemical Behavior of Mg2+ Ions in MgCl2-CaCl2-NaCl Molten Salt  

Ryu, Hyo Yeol (Department of Chemical Engineering, Chungbuk National University)
Jeong, Sang Mun (Department of Chemical Engineering, Chungbuk National University)
Kim, Jeong-Guk (Korea Atomic Energy Research Insitute)
Publication Information
Korean Chemical Engineering Research / v.50, no.6, 2012 , pp. 939-944 More about this Journal
Abstract
The electrochemical behavior of magnesium ions was examined by cyclic voltammetry in a molten $MgCl_2-CaCl_2$-NaCl salt. The reduction potential of magnesium ions was measured and those values were estimated with the variation of the concentration of $MgCl_2$ and the temperature of molten salts. The diffusion coefficient of the $Mg^{2+}$ ions has been determined at 660, 680, 700, 720 and $740^{\circ}C$. The values were $8.79{\times}10^{-6}$, $9.56{\times}10^{-6}$, $1.17{\times}10^{-5}$, $1.4{\times}10^{-5}$ and $1.77{\times}10^{-5}\;cm^2\;s^{-1}$. The activation energy for the diffusion processes of $Mg^{2+}$ ions was found to be $70.28\;kJ\;mol^{-1}$ by using the Arrhenius equation.
Keywords
Magnesium; Electrowinning; Diffusion Coefficient; Cyclic Voltammetry; Molten Salt;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Park, H. K., "Review on the Current Status of Magnesium Smelting," J. KSGE, 11(1), 13-18(2008).   과학기술학회마을   DOI
2 Gao, F., Nie, Z. R., Wang, Z. H., Gong, X. Z. and Zuo, T. Y., "Assessing Environmental Impact of Magnesium Production Using Pidgeon Process in China," J. Trans. Nonferrous Met. Soc. China., 18(3), 749-754(2008).   DOI   ScienceOn
3 Thayer, R. L. and Neelameggham, R. N., "Improving the Electrolytic Process for Magnesium Production," JOM., 53(8), 15-17 (2001).   DOI   ScienceOn
4 Rajagopalan, N., Srikantan, S., Srinivasan, L. K., Kannan, G. N. and Selvakesavan, A., "Developing an Energy-Efficient Electrolytic Cell for Magnesium," JOM., 52(3), 18-19(2000).   DOI   ScienceOn
5 Jeong, S. M., Jung, J. Y., Seo, C. S. and Park, S. W., "Characteristics of an Electrochemical Reduction of $Ta_{2}O_{5}$ for the Preparation of Metallic Tantalum in a LiCl-$Li_{2}O$ Molten Salt," J. Alloys Compd., 440(1-2), 210-215(2007).   DOI   ScienceOn
6 Jeong, S. M., Yoo, H. Y., Hur, J. M. and Seo, C. S., "Preparation of Metallic Niobium from Niobium Pentoxide by an Indirect Electrochemical Reduction in a $LiCl-Li_{2}O$ Molten Salt," J. Alloys Compd., 452(1), 27-31(2008).   DOI   ScienceOn
7 Jeong, S. M., Shin, H. S., Hong, S. S., Hur, J. M., Do, J. B. and Lee, H. S., "Electrochemical Reduction Behavior of $U_{3}O_{8}$ Powder in a LiCl Molten Salt," J. Electrochim. Acta, 55(5), 1749-1755(2010).   DOI   ScienceOn
8 Martinez, A. M., Borresen, B., Haarberg, G. M., Castrillejo, Y. and Tunold, R., "Electrodeposition of Magnesium from $CaCl_{2}-NaCl-KCl-MgCl_{2}$ Melts," J. Electrochem. Soc., 151(7), C508-C513 (2004).   DOI   ScienceOn
9 Martinez, A. M., Borresen, B., Haarberg, G. M., Castrillejo, Y. and Tunold, R., "Electrodeposition of Magnesium from the Eutectic LiCl-KCl melt," J. Appl. Electrochem., 34(12), 1271-1278(2004).   DOI
10 Castrillegjo, Y., Martinez, A. M., Pardo, R. and Haarberg, G. M., "Electrochemical Behavior of Magnesium Ions in the Equimolar $CaCl_{2}-NaCl$ Mixture at $550^{\circ}C$," J. Electrochim. Acta, 42(12), 1869-1876(1997).   DOI   ScienceOn
11 Store, T., Haarberg, G. M. and Tunold, R., "Determination of Diffusion Coefficients of Depositing Ions in Molten Chlorides by Transient Electrochemical Techniques," J. Appl. Electrochem., 30(12), 1351-1360(2000).   DOI   ScienceOn