摘要
对阴离子交换膜电解槽在氯盐电解质中电沉积锰进行研究,并采用循环伏安法对其进行电化学分析。研究结果表明:电解最佳条件是锰离子浓度为0.9 mol/L,氯化铵浓度为2.4 mol/L,电解温度为40℃,电流密度为450A/m2,pH为7.3,SeO2浓度为0.36 mmol/L,在此条件下,金属锰的电沉积效率为90.8%,电耗为4 816 kW·h/t;其晶型为γ型;利用离子膜电解槽电沉积金属锰能有效地防止阴极表面Mn2+的浓差极化,提高电流效率,该过程所发生的还原反应为扩散过程控制。
The electrodeposition of metallic manganese using electrolytic membrane reactor from chloride-based electrolytic solution was investigated, and the electrochemical scanning of the processes was tested by cyclic voltammetry. The results show that the current efficiency can be up to 90.8% and the power consumption can be reduced to 4 816 kW·h/t under the condition of manganese ion concentration of 0.9 mol/L, ammonium sulfate concentration of 2.4 mol/L, temperature of 40 ℃, current density of 450 A/m2, pH of 7.3 and SeO2 concentration of 0.36 mmol/L, and the manganese phase is γ-manganese. The process can prevent Mn2＋ concentration polarization on the cathode surface and increase the current efficiency in the anion-exchange membrane. The metallic manganese reduction is a diffusion-controlled process.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第7期2157-2163,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(21176026
21176242)
国家高技术研究发展计划("863"计划)项目(2012AA062401)
中国大洋矿产资源研究计划项目(DY125-15-T-08)
关键词
金属锰
阴离子交换膜
氯盐
循环伏安法
metallic manganese
anion-exchange membrane
chloride-based electrolytic solution
cyclic voltammetry
