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研究了利用316L不锈钢做阴极时,二氧化硫电化学还原制备硫磺过程的机理和影响因素。利用循环伏安法、计时电量法研究了二氧化硫在316L不锈钢电极上的还原机理,提出二氧化硫经历了4个电子4个质子的还原过程。通过离子膜反应器分别考察了电流密度、阴极液酸浓度对二氧化硫电化学还原制备硫磺过程的影响。当二氧化硫浓度5g/L、硫酸浓度0.5mol/L、电流密度126.98A/m2、电解时间3h时,二氧化硫转化为硫磺的转化率为73.42%,空时产量0.64kg/(m3·h),单位能耗9.64kWh/kg。
Abstract：Mechanism and influencing factors on preparation of sulphur by sulfur dioxide electrochemical reduction process with 316 Lstainless steel as cathode were studied.Reduction mechanism of sulfur dioxide on 316 Lstainless steel electrode was studied by cyclic voltammetry and chronocoulometry methods.It was proposed that sulfur dioxide experienced reduction process of four electrons and four protons.Effects of current density and acid concentration of cathode solution on electrochemical reduction process were investigated in ionic membrane reactor.The results show that conversion rate of sulfur dioxide to sulfur is73.42%,space-time output is 0.64 kg/(m3·h),and unit energy consumption is 9.64 kWh/kg under the conditions including sulfur dioxide concentration of 5 g/L,sulfuric acid concentration of 0.5 mol/L,current density of 126.98 A/m2,and electrolysis duration of 3 h.
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基本信息:
中图分类号:TQ125.11;X701
引用信息:
[1]张正阳,王海北,孙留根.二氧化硫膜电解制备硫磺机理与应用研究[J].有色金属(冶炼部分),2020(04):1-7.
基金信息:
国家自然科学基金（面上项目）资助项目（51574034）
2020-04-12
2020-04-12