K2CO3-Containing Composite Sorbents Based on a ZrO2 Aerogel for Reversible CO2 Capture from Ambient Air Full article
| Journal |
Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093 |
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| Output data | Year: 2021, Volume: 310, Article number : 110624, Pages count : 9 DOI: 10.1016/j.micromeso.2020.110624 | ||||||||
| Tags | Zirconia; Aerogel; Potassium carbonate; Carbon dioxide; Direct air capture | ||||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 19-73-00079 |
Abstract:
In this work, K2CO3-containing composite materials were synthesized based on a mesoporous zirconia aerogel prepared by an epoxide-assisted sol-gel method using supercritical drying in ethanol. The porous ZrO2 was impregnated with an aqueous solution of potassium carbonate to obtain composite materials with K2CO3 weight content ranging from 9 to 29 wt%. All the composites were tested in the process of CO2 absorption from the air with a relative humidity of 25% followed by thermal desorption at 200 °C. The samples after the CO2 absorption step were characterized by Fourier transform infrared spectroscopy and X-ray diffraction methods. Among the materials studied, the composite sorbent containing 23 wt% K2CO3 demonstrated the highest dynamic CO2 absorption capacity (4.6 wt%) in the temperature-swing absorption (TSA) cycles. The results indicate that a certain part of K2CO3 loaded into zirconia mesopores forms surface species which do not actively participate in the CO2 absorption and desorption processes. For the composite K2CO3/ZrO2 material with the optimal K2CO3 loading, CO2 absorption capacity is higher compared to the values obtained for K2CO3/γ-Al2O3 composite sorbents studied under the same conditions. Taking into account that this material demonstrates stable CO2 absorption capacity values in the consecutive TSA cycles and needs a relatively low temperature for regeneration, it should be considered for application in Direct Air Capture units.
Cite:
Veselovskaya J.V.
, Derevschikov V.S.
, Shalygin A.S.
, Yatsenko D.A.
K2CO3-Containing Composite Sorbents Based on a ZrO2 Aerogel for Reversible CO2 Capture from Ambient Air
Microporous and Mesoporous Materials. 2021. V.310. 110624 :1-9. DOI: 10.1016/j.micromeso.2020.110624 WOS Scopus РИНЦ AN OpenAlex
K2CO3-Containing Composite Sorbents Based on a ZrO2 Aerogel for Reversible CO2 Capture from Ambient Air
Microporous and Mesoporous Materials. 2021. V.310. 110624 :1-9. DOI: 10.1016/j.micromeso.2020.110624 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Apr 23, 2020 |
| Accepted: | Sep 3, 2020 |
| Published online: | Sep 9, 2020 |
| Published print: | Jan 1, 2021 |
Identifiers:
| Web of science: | WOS:000583654300004 |
| Scopus: | 2-s2.0-85091348158 |
| Elibrary: | 45270537 |
| Chemical Abstracts: | 2020:1959328 |
| OpenAlex: | W3084143374 |