College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources , Wuhan University , Wuhan 430072 , China.
National Engineering Research Center of Advanced Energy Storage Materials , Changsha , 410205 , China.
ACS Appl Mater Interfaces. 2019 Dec 4;11(48):45126-45132. doi: 10.1021/acsami.9b16754. Epub 2019 Nov 19.
Conventional chlor-alkali processes are energy-consuming and environmentally unfriendly. To deal with this problem, we developed a three-step electrolysis (TSE) for a cleaner, energy-saving, and lower-cost chlor-alkali process. This new chlor-alkali process consists of three independent steps: a NaOH-production step in a NaMnO/oxygen-depolarizing cathode cell (step I), a Na and CI extraction step in a Ag/NaMnO cell (step II), and a CI-production step in a graphite/AgCl cell (step III). This technology avoids the use of expensive ion-exchange membrane and toxic electrode materials, providing a great prospect to create a cleaner, energy-saving, and lower-cost chlor-alkali electrolysis process. This electrochemical ion coupling/decoupling technology can also be extended to other salt solutions (NaSO/NaNO) to produce corresponding alkali (NaOH) and acid (HSO/HNO), which has potential significance in the chlor-alkali industry.
传统的氯碱工艺既耗能又不环保。为解决这一问题，我们开发了一种三步电解法（TSE），用于更清洁、节能和低成本的氯碱工艺。该新型氯碱工艺由三个独立的步骤组成：在 NaMnO/氧去极化阴极电池中生成 NaOH（步骤 I）、在 Ag/NaMnO 电池中提取 Na 和 CI（步骤 II）、在石墨/AgCl 电池中生成 CI（步骤 III）。该技术避免了使用昂贵的离子交换膜和有毒电极材料，为创造更清洁、节能和低成本的氯碱电解工艺提供了广阔的前景。这种电化学离子耦合/解耦技术也可扩展到其他盐溶液（NaSO/NaNO）中，以生产相应的碱（NaOH）和酸（HSO/HNO），这在氯碱工业中具有潜在的意义。
