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| Mechanism and Application Research of Sulphur Prepared by Membrane Electrolysis of Sulfur Dioxide |
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Received:October 23, 2019
Revised:November 05, 2019
Accepted:November 05, 2019
Published Online:March 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.04.001 |
| KeyWord:sulfur dioxide; electrochemical reduction; sulphur; membrane electrolysis; cyclic voltammetry curve |
| Author | Institution |
| ZHANG Zheng-yang |
北京矿冶科技集团有限公司 |
| WANG Hai-bei |
北京矿冶科技集团有限公司 |
| SUN Liu-gen |
北京矿冶科技集团有限公司 |
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| Abstract: |
| Mechanism and influencing factors on preparation of sulphur by sulfur dioxide electrochemical reduction process with 316L stainless steel as cathode were studied. Reduction mechanism of sulfur dioxide on 316L stainless 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 is 73.42%, 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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