An ethylenediamine-grafted Y zeolite: a highly regenerable carbon dioxide adsorbent via temperature swing adsorption without urea formation
- Authors
- Kim, Chaehoon; Cho, Hae Sung; Chang, Shuai; Cho, Sung June; Choi, Minkee
- Issue Date
- May-2016
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, v.9, no.5, pp 1803 - 1811
- Pages
- 9
- Journal Title
- ENERGY & ENVIRONMENTAL SCIENCE
- Volume
- 9
- Number
- 5
- Start Page
- 1803
- End Page
- 1811
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/64243
- DOI
- 10.1039/c6ee00601a
- ISSN
- 1754-5692
1754-5706
- Abstract
- Solid adsorbents including amine-functionalized porous materials and zeolites have been extensively investigated for post-combustion CO2 capture. Amine-functionalized porous materials have shown highly promising CO2 uptake in a wet flue gas, but suffer from significant amine deactivation due to urea formation under desorption conditions (e.g., desorption under 100% CO2 at >130 degrees C) of temperature swing adsorption (TSA) cycles. In contrast, purely inorganic zeolites are thermochemically stable but cannot adsorb CO2 from a wet flue gas because of the preferential H2O adsorption. In the present work, we synthesized an ethylenediamine-grafted Y zeolite, which can synergistically combine the strengths of both adsorbent systems. The amine groups can effectively capture CO2 in a wet flue gas, while the strongly co-adsorbed H2O within the hydrophilic zeolite micropores suppresses urea formation (dehydration reaction between amines and CO2) under desorption conditions according to Le Chatelier's principle. The organic-zeolite hybrid adsorbent retains working capacities higher than 1.1 mmol g(-1) over 20 TSA cycles. Because the adsorbent is prepared from a commercially available zeolite, it is also highly cost efficient and suitable for mass production.
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Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
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