at Google ScholarTitle data
Hunvik, Kristoffer W. Bø ; Loch, Patrick ; Wallacher, Dirk ; Kirch, Alexsandro ; Cavalcanti, Leide P. ; Rieß, Martin ; Daab, Matthias ; Josvanger, Vegard ; Grätz, Sven ; Yokaichiya, Fabiano ; Knudsen, Kenneth Dahl ; Miranda, Caetano Rodrigues ; Breu, Josef ; Fossum, Jon Otto:
CO₂ Adsorption Enhanced by Tuning the Layer Charge in a Clay Mineral.
In: Langmuir.
Vol. 37
(2021)
Issue 49
.
- pp. 14491-14499.
ISSN 1520-5827
DOI: https://doi.org/10.1021/acs.langmuir.1c02467
Abstract in another language
Due to the compact two-dimensional interlayer pore space and the high density of interlayer molecular adsorption sites, clay minerals are competitive adsorption materials for carbon dioxide capture. We demonstrate that with a decreasing interlayer surface charge in a clay mineral, the adsorption capacity for CO2 increases, while the pressure threshold for adsorption and swelling in response to CO2 decreases. Synthetic nickel-exchanged fluorohectorite was investigated with three different layer charges varying from 0.3 to 0.7 per formula unit of Si4O10F2. We associate the mechanism for the higher CO2 adsorption with more accessible space and adsorption sites for CO2 within the interlayers. The low onset pressure for the lower-charge clay is attributed to weaker cohesion due to the attractive electrostatic forces between the layers. The excess adsorption capacity of the clay is measured to be 8.6, 6.5, and 4.5 wt % for the lowest, intermediate, and highest layer charges, respectively. Upon release of CO2, the highest-layer charge clay retains significantly more CO2. This pressure hysteresis is related to the same cohesion mechanism, where CO2 is first released from the edges of the particles thereby closing exit paths and trapping the molecules in the center of the clay particles.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | CARBON DIOXIDE; COLLECTIVE DYNAMICS; X-RAY; WATER; MONTMORILLONITE; HYDRATION; INTERCALATION; SMECTITE; DELAMINATION; ORGANIZATION |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I > Chair Inorganic Chemistry I - Univ.-Prof. Dr. Josef Breu Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 06 Oct 2022 05:57 |
| Last Modified: | 06 Oct 2022 05:57 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/72217 |