A Membrane-Free and Energy-Efficient Three-Step Chlor-Alkali Electrolysis with Higher-Purity NaOH Production
Source abstract
Abstract
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 Na0.44MnO2/oxygen-depolarizing cathode cell (step I), a Na+ and CI– extraction step in a Ag/Na0.44–xMnO2 cell (step II), and a CI2-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 (Na2SO4/NaNO3) to produce corresponding alkali (NaOH) and acid (H2SO4/HNO3), which has potential significance in the chlor-alkali industry.
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Research context
OpenAlex topics: Advanced battery technologies research · Membrane-based Ion Separation Techniques · Hydrogen Storage and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
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
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
Funding
Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China
References (37)
Show source-provided references
1. O’Brien T. F. · 2007 · 1
2. Brinkmann T. · 2014
3. 10.1007/s10098-013-0630-610.1007/s10098-013-0630-6 ↗
4. 10.1080/15275922.2016.117775510.1080/15275922.2016.1177755 ↗
5. 10.1016/j.spc.2017.05.00110.1016/j.spc.2017.05.001 ↗
6. Ring, K. Chemical Economics Handbook; IHS Chemical: Englewood, 2004, 1–29.
7. 10.1351/pac19966809171310.1351/pac199668091713 ↗
8. 10.1007/s12665-015-5171-310.1007/s12665-015-5171-3 ↗
9. 10.1038/268133a010.1038/268133a0 ↗
10. 10.1179/oeh.2007.13.1.8010.1179/oeh.2007.13.1.80 ↗
11. 10.1002/1521-4125(200202)25:2<167::AID-CEAT167>3.0.CO;2-010.1002/1521-4125(200202)25:2<167::AID-CEAT167>3.0.CO;2-0 ↗
12. 10.1016/j.jclepro.2014.05.08610.1016/j.jclepro.2014.05.086 ↗
13. 10.1007/s10800-008-9556-910.1007/s10800-008-9556-9 ↗
14. 10.1016/j.electacta.2011.06.01310.1016/j.electacta.2011.06.013 ↗
15. 10.1016/j.electacta.2016.05.20910.1016/j.electacta.2016.05.209 ↗
16. 10.1016/j.jcis.2004.08.04010.1016/j.jcis.2004.08.040 ↗
17. 10.1016/j.jcis.2007.06.05610.1016/j.jcis.2007.06.056 ↗
18. 10.1038/s41467-018-02877-x10.1038/s41467-018-02877-x ↗
19. 10.1021/acsami.8b0047810.1021/acsami.8b00478 ↗
20. 10.1002/adma.20110090410.1002/adma.201100904 ↗
21. 10.1021/acsami.6b1383010.1021/acsami.6b13830 ↗
22. 10.1016/j.jpowsour.2016.01.10110.1016/j.jpowsour.2016.01.101 ↗
23. 10.1016/j.nanoen.2016.07.02110.1016/j.nanoen.2016.07.021 ↗
24. 10.1039/c2ee22977c10.1039/c2ee22977c ↗
25. 10.1039/c3cp50919b10.1039/c3cp50919b ↗
26. 10.1016/j.jcis.2017.07.05410.1016/j.jcis.2017.07.054 ↗
27. 10.1039/C5NR07486J10.1039/C5NR07486J ↗
28. 10.1016/S0022-0728(03)00355-310.1016/S0022-0728(03)00355-3 ↗
29. 10.1016/j.elecom.2005.02.02310.1016/j.elecom.2005.02.023 ↗
30. 10.1016/j.jpowsour.2013.02.09010.1016/j.jpowsour.2013.02.090 ↗
31. 10.1016/j.elecom.2010.01.02010.1016/j.elecom.2010.01.020 ↗
32. 10.1002/aenm.20120059810.1002/aenm.201200598 ↗
33. 10.1039/c1ee02190g10.1039/c1ee02190g ↗
34. 10.1021/acs.chemmater.7b0026910.1021/acs.chemmater.7b00269 ↗
35. 10.1002/cssc.20180304510.1002/cssc.201803045 ↗
36. 10.1016/j.electacta.2012.03.09210.1016/j.electacta.2012.03.092 ↗
37. 10.1016/j.jpowsour.2016.10.06610.1016/j.jpowsour.2016.10.066 ↗