L-lysine-assisted Synthesis of Gismondine and Chabazite Nanozeolites for Direct Air Capture of CO2
SCOPUS
- Title
- L-lysine-assisted Synthesis of Gismondine and Chabazite Nanozeolites for Direct Air Capture of CO2
- Authors
- Kevin S. Kencana; K. Christian Kemp; HONG, SUK BONG
- Date Issued
- 2024-01
- Publisher
- Pergamon Press Ltd.
- Abstract
- The search for more efficient and selective solid adsorbents towards carbon capture, particularly in trace CO2 concentration, remains a significant challenge. Here, we present the synthesis of nanocrystalline sodium gismondine (Na-GIS) with Si/Al = 2.5 and potassium chabazite (K-CHA) zeolites with Si/Al = 2.0 using L-lysine as a crystal growth inhibitor. Na-GIS nanozeolites were found to show a CO2 uptake as high as 0.70 mmol g−1 under direct air capture (DAC) conditions (i.e., 298 K and 400 ppm CO2), about 18 times greater than that of microcrystalline Na-GIS, together with high adsorbent stability. Such behavior was also observed for Na-CHA nanozeolites, although the extent of increase (0.47 vs 0.13 mmol g−1) was smaller compared to the microcrystalline counterpart. This study demonstrates that the introduction of nanocrystallinity into small-pore zeolites without losing intrinsic microporosity is a viable route to the development of more efficient zeolite-based DAC adsorbents. © 2023 Elsevier B.V.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/118973
- DOI
- 10.1016/j.seppur.2023.125154
- ISSN
- 1383-5866
- Article Type
- Article
- Citation
- Separation and Purification Technology, vol. 329, 2024-01
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- There are no files associated with this item.
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