Zhang, B;
Bogush, A;
Wei, J;
Zhang, T;
Hu, J;
Li, F;
Yu, Q;
(2017)
Reversible Carbon Dioxide Capture at High Temperatures by Tetraethylenepentamine Acetic Acid and Polyethylene Glycol Mixtures with High Capacity and Low Viscosity.
Energy and Fuels
, 31
(4)
pp. 4237-4244.
10.1021/acs.energyfuels.6b03458.
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Bogush AAM Zhang et al._2017_Reversible carbon dioxide capture at high temperatures by tetraethylenepentamine acetic acid and polyethylene glycol mixtures with high capacity and.pdf - Accepted Version Download (779kB) | Preview |
Abstract
Ionic liquids (ILs) are investigated in many studies to capture CO2 in recent years. However, almost all of these studies carried out the absorption of CO2 by ILs at relatively low temperatures (lower than 333.15 K or even around room temperature). Besides, the viscosity of ILs increases dramatically after absorbing CO2, which could reduce the absorption efficiency significantly. Reversible and efficient absorption of CO2 at high temperatures was investigated by IL of tetraethylenepentamine acetic acid ([TEPA]Ac) and polyethylene glycol 200 (PEG-200) mixtures with low viscosity. The results showed that the absorption capacity of [TEPA]Ac/PEG-200 mixtures achieved 1.24 mol of CO2/mol of [TEPA]Ac at 353.15 K at ambient pressure (1.01 bar). The mixtures could be easily regenerated by bubbling dried N2 through them. The addition of PEG-200 in [TEPA]Ac could increase the efficiency of absorption and desorption significantly. Furthermore, the solubility data of CO2 in the [TEPA]Ac/PEG-200 mixtures at T = 353.15, 368.15, 383.15, and 398.15 K under different pressures were measured, and the solution enthalpy (ΔHsol) and solution entropy (ΔSsol) were calculated. Under all of the conditions, the negative value of ΔHsol indicated that the capture process is exothermic. The process of CO2 capture described that using [TEPA]Ac/PEG-200 mixtures is a promising approach for CO2 absorption with high reversibility and excellent absorption property at a relatively high temperature.
| Type: | Article |
|---|---|
| Title: | Reversible Carbon Dioxide Capture at High Temperatures by Tetraethylenepentamine Acetic Acid and Polyethylene Glycol Mixtures with High Capacity and Low Viscosity |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.energyfuels.6b03458 |
| Publisher version: | https://doi.org/10.1021/acs.energyfuels.6b03458 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Carbon capture, Ionic liquid, Tetraethylenepentamine acetic acid, Polyethylene glycol, High temperature, High capacity |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1547079 |
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