Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurry
Efficient and reversible capture of CO2 remains a critical challenge in advancing carbon capture technologies. In this study, a deep eutectic solvent (DES) comprising 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) and ethylene glycol (EG) in a (1:2) molar ratio was selected as a CO2 absorbent due to its hig...
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Elsevier
2025-06-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S259012302501237X |
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| author | Sahar Foorginezhad Xiaoyan Ji |
| author_facet | Sahar Foorginezhad Xiaoyan Ji |
| author_sort | Sahar Foorginezhad |
| collection | DOAJ |
| description | Efficient and reversible capture of CO2 remains a critical challenge in advancing carbon capture technologies. In this study, a deep eutectic solvent (DES) comprising 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) and ethylene glycol (EG) in a (1:2) molar ratio was selected as a CO2 absorbent due to its high capture capacity, thermal stability, and ease of synthesis. To further enhance sorption/desorption performance, a range of slurries were developed by integrating the pure DES with silica particles impregnated with the same DES, introducing additional active sites for CO2 capture. Results confirmed that adding 3 wt.% immobilized silica to the DES increased the CO2 capture capacity from 16.77 wt.% for the pure DES to 20.23 wt.% for the slurry at 22°C and 1 bar. Moreover, the sorption rate increased from 0.41 mol-CO2/(kg-sorbent·min) for the pure DES to 0.51 mol-CO2/(kg-sorbent·min) for the slurry at 22°C, while the desorption rate increased from 0.63 mol-CO2/(kg-sorbent·min) at 90°C to 0.84 mol-CO2/(kg-sorbent·min). Also, the slurry exhibited promising capture capacity over consecutive sorption-desorption cycles (97.27 wt.%), minimal solvent loss against heating at 100 °C for 120 hr (0.64 wt.%), and stability against long-term storage up to one month. |
| format | Article |
| id | doaj-art-de33678cd8014e25a2cb96459fefb549 |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Results in Engineering |
| spelling | doaj-art-de33678cd8014e25a2cb96459fefb5492025-08-20T03:48:50ZengElsevierResults in Engineering2590-12302025-06-012610516210.1016/j.rineng.2025.105162Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurrySahar Foorginezhad0Xiaoyan Ji1Corresponding authors.; Energy Science/Energy Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, SwedenCorresponding authors.; Energy Science/Energy Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, SwedenEfficient and reversible capture of CO2 remains a critical challenge in advancing carbon capture technologies. In this study, a deep eutectic solvent (DES) comprising 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) and ethylene glycol (EG) in a (1:2) molar ratio was selected as a CO2 absorbent due to its high capture capacity, thermal stability, and ease of synthesis. To further enhance sorption/desorption performance, a range of slurries were developed by integrating the pure DES with silica particles impregnated with the same DES, introducing additional active sites for CO2 capture. Results confirmed that adding 3 wt.% immobilized silica to the DES increased the CO2 capture capacity from 16.77 wt.% for the pure DES to 20.23 wt.% for the slurry at 22°C and 1 bar. Moreover, the sorption rate increased from 0.41 mol-CO2/(kg-sorbent·min) for the pure DES to 0.51 mol-CO2/(kg-sorbent·min) for the slurry at 22°C, while the desorption rate increased from 0.63 mol-CO2/(kg-sorbent·min) at 90°C to 0.84 mol-CO2/(kg-sorbent·min). Also, the slurry exhibited promising capture capacity over consecutive sorption-desorption cycles (97.27 wt.%), minimal solvent loss against heating at 100 °C for 120 hr (0.64 wt.%), and stability against long-term storage up to one month.http://www.sciencedirect.com/science/article/pii/S259012302501237XCarbon captureImmobilizationSlurryDeep eutectic solventSilica |
| spellingShingle | Sahar Foorginezhad Xiaoyan Ji Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurry Results in Engineering Carbon capture Immobilization Slurry Deep eutectic solvent Silica |
| title | Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurry |
| title_full | Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurry |
| title_fullStr | Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurry |
| title_full_unstemmed | Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurry |
| title_short | Enhanced CO2 capture performance using deep eutectic solvent-immobilized silica slurry |
| title_sort | enhanced co2 capture performance using deep eutectic solvent immobilized silica slurry |
| topic | Carbon capture Immobilization Slurry Deep eutectic solvent Silica |
| url | http://www.sciencedirect.com/science/article/pii/S259012302501237X |
| work_keys_str_mv | AT saharfoorginezhad enhancedco2captureperformanceusingdeepeutecticsolventimmobilizedsilicaslurry AT xiaoyanji enhancedco2captureperformanceusingdeepeutecticsolventimmobilizedsilicaslurry |