A comprehensive review on regeneration strategies for direct air capture
Direct air capture (DAC), which removes CO2 directly from ambient air, is a critical negative emission technology for mitigating global climate change. Efficiency and the source of energy are crucial considerations for DAC to enable negative emissions. Substantial technological progress has been mad...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Journal of CO2 Utilization |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982023001981 |
| _version_ | 1797659940213489664 |
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| author | Keju An Kai Li Cheng-Min Yang Jamieson Brechtl Kashif Nawaz |
| author_facet | Keju An Kai Li Cheng-Min Yang Jamieson Brechtl Kashif Nawaz |
| author_sort | Keju An |
| collection | DOAJ |
| description | Direct air capture (DAC), which removes CO2 directly from ambient air, is a critical negative emission technology for mitigating global climate change. Efficiency and the source of energy are crucial considerations for DAC to enable negative emissions. Substantial technological progress has been made in DAC technologies, and promising opportunities exist for commercial-scale deployments. However, DAC technologies require high regeneration energy to release CO2 from sorbents. Various approaches have been tested and optimized for different DAC systems. This review demonstrates that the work equivalent regeneration energy demand (supported by either the electric grid or fossil fuel combustion) ranges from 0.5–18.75 GJ/t-CO2 for solid sorbent DAC systems and 0.62–17.28 GJ/t-CO2 for liquid solvent DAC systems. The regeneration process is the energy-demanding process in DAC that is a key step for efficient operation. Potential methods to lower the regeneration energy demand include microwave, ultrasound, magnetic particle heating, and electric swing. Although the potential methods to date are still at the lab scale, significant work is being done to optimize DAC system processes. |
| first_indexed | 2024-03-11T18:22:34Z |
| format | Article |
| id | doaj.art-d1be1007028a48ac85f5d29dc50639e6 |
| institution | Directory Open Access Journal |
| issn | 2212-9839 |
| language | English |
| last_indexed | 2024-03-11T18:22:34Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj.art-d1be1007028a48ac85f5d29dc50639e62023-10-15T04:37:36ZengElsevierJournal of CO2 Utilization2212-98392023-10-0176102587A comprehensive review on regeneration strategies for direct air captureKeju An0Kai Li1Cheng-Min Yang2Jamieson Brechtl3Kashif Nawaz4Building Technologies Research and Integration Center, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USABuilding Technologies Research and Integration Center, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USABuilding Technologies Research and Integration Center, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USABuilding Technologies Research and Integration Center, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USACorrespondence to: 1 Bethel Valley Road, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.; Building Technologies Research and Integration Center, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USADirect air capture (DAC), which removes CO2 directly from ambient air, is a critical negative emission technology for mitigating global climate change. Efficiency and the source of energy are crucial considerations for DAC to enable negative emissions. Substantial technological progress has been made in DAC technologies, and promising opportunities exist for commercial-scale deployments. However, DAC technologies require high regeneration energy to release CO2 from sorbents. Various approaches have been tested and optimized for different DAC systems. This review demonstrates that the work equivalent regeneration energy demand (supported by either the electric grid or fossil fuel combustion) ranges from 0.5–18.75 GJ/t-CO2 for solid sorbent DAC systems and 0.62–17.28 GJ/t-CO2 for liquid solvent DAC systems. The regeneration process is the energy-demanding process in DAC that is a key step for efficient operation. Potential methods to lower the regeneration energy demand include microwave, ultrasound, magnetic particle heating, and electric swing. Although the potential methods to date are still at the lab scale, significant work is being done to optimize DAC system processes.http://www.sciencedirect.com/science/article/pii/S2212982023001981Direct air captureRegeneration methodNegative emission technologyEnergy demandCO2 capture capacity |
| spellingShingle | Keju An Kai Li Cheng-Min Yang Jamieson Brechtl Kashif Nawaz A comprehensive review on regeneration strategies for direct air capture Journal of CO2 Utilization Direct air capture Regeneration method Negative emission technology Energy demand CO2 capture capacity |
| title | A comprehensive review on regeneration strategies for direct air capture |
| title_full | A comprehensive review on regeneration strategies for direct air capture |
| title_fullStr | A comprehensive review on regeneration strategies for direct air capture |
| title_full_unstemmed | A comprehensive review on regeneration strategies for direct air capture |
| title_short | A comprehensive review on regeneration strategies for direct air capture |
| title_sort | comprehensive review on regeneration strategies for direct air capture |
| topic | Direct air capture Regeneration method Negative emission technology Energy demand CO2 capture capacity |
| url | http://www.sciencedirect.com/science/article/pii/S2212982023001981 |
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