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Adsorption of CO2 on Sodium-Exchanged Ferrierites: The Bridged CO2 Complexes Formed between Two Extraframework Cations
- 1.0331256 - ÚOCHB 2010 RIV US eng J - Journal Article
Pulido, Maria Angeles - Nachtigall, Petr - Pérez-Dominguez, Irene - Zukal, Arnošt - Čejka, Jiří
Adsorption of CO2 on Sodium-Exchanged Ferrierites: The Bridged CO2 Complexes Formed between Two Extraframework Cations.
Journal of Physical Chemistry C. Roč. 113, č. 7 (2009), s. 2928-2935. ISSN 1932-7447. E-ISSN 1932-7455
R&D Projects: GA ČR GA203/06/0324; GA MŠMT LC512; GA ČR GA203/08/0604
Institutional research plan: CEZ:AV0Z40550506; CEZ:AV0Z40400503
Keywords : zeolites * CO2 capture * adsorption
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 4.224, year: 2009
Isosteric heats of adsorption of CO2 on Na-FER with different Si/Al ratios were obtained from the adsorption isotherms. Large isosteric heats of adsorption were obtained for Na-FER when Si/Al = 8.7. Based on calculations employing the periodic DFT model, these large isosteric heats are attributed to the formation of the linearly bridged CO2 adsorption complexes formed between a pair of Na+ cations located in cationic positions. The CO2 adsorption complexes formed on such dual cation sites are ca 10 kJ/mol more stable than the CO2 adsorption complexes where CO2 interacts only with a single Na cation.
Permanent Link: http://hdl.handle.net/11104/0176823
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