About: Adsorption of Carbon Dioxide on Sodium and Potassium Forms of STI Zeolite

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Sodium and potassium forms of STI zeolite synthesized with Si/Al ratios 15, 25, and 35 were characterized using X-ray powder diffraction and nitrogen adsorption at 77 K. To obtain detailed information on the effect of alkali metal cations on CO2 adsorption, the temperature dependence of CO2 isotherms was investigated in the temperature range from 273 to 333 K. Based on these data, isosteric heats of adsorption of CO2 were determined. It was found that the isosteric heat of CO2 adsorption attains the highest values on the sodium form of STI zeolite with a Si/Al ratio of 15. The lowest values were found with both sodium and potassium forms of STI zeolite having a Si/Al ratio of 35. Heats of adsorption of CO2 obtained for STI zeolites were discussed in detail and compared with those of FER, MFI, MEL, TUN, and IMF structural types. This comparison revealed that isosteric heats of adsorption of CO2 on STI zeolites are lower by approximately 8 kJ mol1 compared with heats of adsorption for FER, MFI, MEL, TUN, and IMF zeolites composed of the eight- or/and ten-ring channel systems as well as STI zeolites. This effect was explained on the basis of stronger interaction of alkali metal cations with oxygen atoms of the zeolitic framework. Sodium and potassium forms of STI zeolite synthesized with Si/Al ratios 15, 25, and 35 were characterized using X-ray powder diffraction and nitrogen adsorption at 77 K. To obtain detailed information on the effect of alkali metal cations on CO2 adsorption, the temperature dependence of CO2 isotherms was investigated in the temperature range from 273 to 333 K. Based on these data, isosteric heats of adsorption of CO2 were determined. It was found that the isosteric heat of CO2 adsorption attains the highest values on the sodium form of STI zeolite with a Si/Al ratio of 15. The lowest values were found with both sodium and potassium forms of STI zeolite having a Si/Al ratio of 35. Heats of adsorption of CO2 obtained for STI zeolites were discussed in detail and compared with those of FER, MFI, MEL, TUN, and IMF structural types. This comparison revealed that isosteric heats of adsorption of CO2 on STI zeolites are lower by approximately 8 kJ mol1 compared with heats of adsorption for FER, MFI, MEL, TUN, and IMF zeolites composed of the eight- or/and ten-ring channel systems as well as STI zeolites. This effect was explained on the basis of stronger interaction of alkali metal cations with oxygen atoms of the zeolitic framework. (en)
Title	Adsorption of Carbon Dioxide on Sodium and Potassium Forms of STI Zeolite Adsorption of Carbon Dioxide on Sodium and Potassium Forms of STI Zeolite (en)
skos:prefLabel	Adsorption of Carbon Dioxide on Sodium and Potassium Forms of STI Zeolite Adsorption of Carbon Dioxide on Sodium and Potassium Forms of STI Zeolite (en)
skos:notation	RIV/61388955:_____/12:00379329!RIV13-GA0-61388955
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GA203/08/0604)
http://linked.open...iv/cisloPeriodika	8
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Kubů, Martin Zukal, Arnošt Čejka, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	121149
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/12:00379329
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	adsorption; carbon dioxide; zeolites (en)
http://linked.open.../riv/klicoveSlovo	adsorption carbon dioxide zeolites
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[F2E3C959D255]
http://linked.open...i/riv/nazevZdroje	ChemPlusChem
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Advanced molecular sieves for capture and storage of CO2 and H2
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	77
http://linked.open...iv/tvurceVysledku	Kubů, Martin Zukal, Arnošt Čejka, Jiří Zones, S. I. Davis, T. M.
http://linked.open...ain/vavai/riv/wos	000307401800008
issn	2192-6506
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1002/cplu.201200089

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