氧阴极在阳离子膜电解硫酸钠中的应用研究

Application research of oxygen cathode in cationic membrane assisted electrolysis of sodium sulfate

在常规阳离子膜电解基础上,选择氧阴极为阴极应用于阳离子膜电解硫酸钠中。考察了氧气压力、电解液浓度、电流密度、电解时间、电极距离、循环搅拌等影响因素,得出了以氧阴极为阴极应用于阳离子膜电解硫酸钠的较佳实验条件,并且分析了其与常规阳离子膜电解硫酸钠的经济性对比。结果表明,采用氧阴极可使槽电压降低1.2 V,并且在消耗相同电量的情况下硫酸和氢氧化钠的产量是常规电解方式的1.23倍和1.77倍,这充分说明了氧阴极应用于阳离子膜电解硫酸钠是可行的。

On the basis of conventional cation membrane electrolysis,the oxygen cathode was chosen as cathode for cationic membrane assisted electrolysis of sodium sulfate.The influences of oxygen pressure,electrolyte concentration,current density,electrolysis time,electrode distance,and cyclic mixing etc. were investigated respectively.The preferable experimental conditions of oxygen cathode as cathode for cationic membrane assisted electrolysis of sodium sulfate were obtained,and then the economic comparison with conventional cationic membrane assisted electrolysis was analyzed.The results showed that cell voltage using oxygen cathode was reduced by 1.2 V,and in the case of the same power consumption,the production of sulfuric acid and sodium hydroxide were increased by 1.23 times and 1.77 times,severally,compared to conventional cation membrane electrolysis method.So,it was fully demonstrated that the application of oxygen cathode in cationic membrane assisted electrolysis of sodium sulfate was feasible.