Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reduction
Abstract Challenges in CO2 capture, CO2 crossover, product separation, and electrolyte recovery hinder electrocatalytic CO2 reduction (CO2R). Here, we present an integrated electrochemical recovery and separation system (ERSS) with an ion separation module (ISM) between the anode and cathode of a wa...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-01-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-56111-6 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832594532989927424 |
|---|---|
| author | Peng Wang An Pei Zhaoxi Chen Peilin Sun Chengyi Hu Xue Wang Nanfeng Zheng Guangxu Chen |
| author_facet | Peng Wang An Pei Zhaoxi Chen Peilin Sun Chengyi Hu Xue Wang Nanfeng Zheng Guangxu Chen |
| author_sort | Peng Wang |
| collection | DOAJ |
| description | Abstract Challenges in CO2 capture, CO2 crossover, product separation, and electrolyte recovery hinder electrocatalytic CO2 reduction (CO2R). Here, we present an integrated electrochemical recovery and separation system (ERSS) with an ion separation module (ISM) between the anode and cathode of a water electrolysis system. During ERSS operation, protons from the anolyte flow through the anodic cation exchange membrane (CEM) into the ISM, acidifying the CO2R effluent electrolyte. Cations like K+ in the ISM flow through the cathodic CEM into the catholyte to balance the OH− ions from hydrogen evolution. ERSS recycles electrolyte-adsorbed CO2, recovers KOH with a 94.0% K+ yield, and achieves an 86.2% separation efficiency for CO2R products. The recovered KOH can capture CO2 from air or flue gas or be utilized as a CO2R electrolyte, closing the CO2 capture, conversion, and utilization loop. Compared to the conventional acid-base neutralization process, ERSS saves $119.76 per ton of KOH recovered and is applicable to other aqueous alkaline electrosynthesis reactions. |
| format | Article |
| id | doaj-art-200b5f27ed644bd38b26eaac3c703b02 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-200b5f27ed644bd38b26eaac3c703b022025-01-19T12:31:21ZengNature PortfolioNature Communications2041-17232025-01-0116111010.1038/s41467-025-56111-6Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reductionPeng Wang0An Pei1Zhaoxi Chen2Peilin Sun3Chengyi Hu4Xue Wang5Nanfeng Zheng6Guangxu Chen7School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of TechnologySchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of TechnologySchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of TechnologySchool of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of TechnologyInnovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM)School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, KowloonInnovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM)School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of TechnologyAbstract Challenges in CO2 capture, CO2 crossover, product separation, and electrolyte recovery hinder electrocatalytic CO2 reduction (CO2R). Here, we present an integrated electrochemical recovery and separation system (ERSS) with an ion separation module (ISM) between the anode and cathode of a water electrolysis system. During ERSS operation, protons from the anolyte flow through the anodic cation exchange membrane (CEM) into the ISM, acidifying the CO2R effluent electrolyte. Cations like K+ in the ISM flow through the cathodic CEM into the catholyte to balance the OH− ions from hydrogen evolution. ERSS recycles electrolyte-adsorbed CO2, recovers KOH with a 94.0% K+ yield, and achieves an 86.2% separation efficiency for CO2R products. The recovered KOH can capture CO2 from air or flue gas or be utilized as a CO2R electrolyte, closing the CO2 capture, conversion, and utilization loop. Compared to the conventional acid-base neutralization process, ERSS saves $119.76 per ton of KOH recovered and is applicable to other aqueous alkaline electrosynthesis reactions.https://doi.org/10.1038/s41467-025-56111-6 |
| spellingShingle | Peng Wang An Pei Zhaoxi Chen Peilin Sun Chengyi Hu Xue Wang Nanfeng Zheng Guangxu Chen Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reduction Nature Communications |
| title | Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reduction |
| title_full | Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reduction |
| title_fullStr | Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reduction |
| title_full_unstemmed | Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reduction |
| title_short | Integrated system for electrolyte recovery, product separation, and CO2 capture in CO2 reduction |
| title_sort | integrated system for electrolyte recovery product separation and co2 capture in co2 reduction |
| url | https://doi.org/10.1038/s41467-025-56111-6 |
| work_keys_str_mv | AT pengwang integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction AT anpei integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction AT zhaoxichen integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction AT peilinsun integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction AT chengyihu integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction AT xuewang integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction AT nanfengzheng integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction AT guangxuchen integratedsystemforelectrolyterecoveryproductseparationandco2captureinco2reduction |