Kassim, Mohd Azlan and Sulaiman, Nor Afifah and Yusoff, Rozita and Aroua, Mohamed Kheireddine (2023) Non-aqueous solvent mixtures for CO2 capture: choline hydroxide-based deep eutectic solvents absorbent performance at various temperatures and pressures. Sustainability, 15 (12). ISSN 2071-1050, DOI https://doi.org/10.3390/su15129191.
Full text not available from this repository.Abstract
Carbon dioxide (CO2) absorption in a non-aqueous solution is a potential technology for reducing greenhouse gas emissions. In this study, a non-aqueous solvent, sulfolane and dimethylsulfoxide (DMSO), was functionalized with a deep eutectic solvent (DES) consisting of choline hydroxide and polyamines diethylenetriamine (DETA) and triethylenetetramine (TETA). The non-aqueous absorbents' CO2 absorption ability was investigated in a high-pressure absorption reactor with a variable absorption temperature (303.15-333.15 K) and pressure (350-1400 kPa). The results showed that 2M ChOH:TETA-DMSO solution had the highest CO2 loading capacity when compared with other screened solutions, such as 2M ChOH:TETA-Sulfolane, 2M ChOH:DETA-DMSO and 2M ChOH:DETA-Sulfolane. It was also found that the absorption capacity increased with increasing pressure and decreased with temperature. The highest CO2 absorption by 2M ChOH:TETA-DMSO was observed at a partial pressure of 1400 kPa at 303.15 K 1.2507 mol CO2/mol DES. The use of a non-aqueous solvent in the mixture showed a phase separation phenomenon after the CO2 absorption reaction due to the formation of insoluble carbamate salt, which was identified through FTIR analysis. These findings suggest that the use of a DES polyamine mixed with a non-aqueous solvent could be a promising solution for CO2 capture.
| Item Type: | Article |
|---|---|
| Funders: | Sunway University [Grant No: GRTIN-IGS-CCDCU[2]-08-2022] |
| Uncontrolled Keywords: | Deep eutectic solvent; Polyamine; CO2 absorption; Non-aqueous |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences T Technology > TD Environmental technology. Sanitary engineering |
| Divisions: | Faculty of Engineering > Department of Chemical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 08 Nov 2025 03:49 |
| Last Modified: | 08 Nov 2025 03:49 |
| URI: | http://eprints.um.edu.my/id/eprint/49769 |
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