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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F11%3A00371375%21RIV12-GA0-61388955
rdf:type
skos:Concept n18:Vysledek
dcterms:description
Adsorption isotherms of carbon dioxide on the Na-A zeolite were measured in the temperature range from 273 to 333 K. Henry's constants and isosteric adsorption heats calculated from the temperature dependence of CO(2) isotherms were combined with results of the variable temperature IR spectroscopy to obtain a spectroscopic signature of adsorption complexes and corresponding thermodynamic characteristics. The adsorption of CO(2) in Na-A zeolite was also investigated computationally, using a periodic density functional model improved for the proper description of dispersion interactions. Based on a good agreement between experimental and calculated adsorption heats and shifts of asymmetric CO(2) stretching frequency due to adsorption the following model of CO(2)/Na-A system is proposed: (i) CO(2) adsorption complexes formed at a low coverage involves interaction of CO(2) with three Na(+) cations in the LTA supercage; they are characterized by the IR band at 2349 cm(-1). (ii) CO(2) adsorption complexes at higher coverages are formed between a pair of Na(+) cations; they are characterized by the IR band centered at 2360 cm(-1). Adsorption isotherms of carbon dioxide on the Na-A zeolite were measured in the temperature range from 273 to 333 K. Henry's constants and isosteric adsorption heats calculated from the temperature dependence of CO(2) isotherms were combined with results of the variable temperature IR spectroscopy to obtain a spectroscopic signature of adsorption complexes and corresponding thermodynamic characteristics. The adsorption of CO(2) in Na-A zeolite was also investigated computationally, using a periodic density functional model improved for the proper description of dispersion interactions. Based on a good agreement between experimental and calculated adsorption heats and shifts of asymmetric CO(2) stretching frequency due to adsorption the following model of CO(2)/Na-A system is proposed: (i) CO(2) adsorption complexes formed at a low coverage involves interaction of CO(2) with three Na(+) cations in the LTA supercage; they are characterized by the IR band at 2349 cm(-1). (ii) CO(2) adsorption complexes at higher coverages are formed between a pair of Na(+) cations; they are characterized by the IR band centered at 2360 cm(-1).
dcterms:title
Combined volumetric, infrared spectroscopic and theoretical investigation of CO(2) adsorption on Na-A zeolite Combined volumetric, infrared spectroscopic and theoretical investigation of CO(2) adsorption on Na-A zeolite
skos:prefLabel
Combined volumetric, infrared spectroscopic and theoretical investigation of CO(2) adsorption on Na-A zeolite Combined volumetric, infrared spectroscopic and theoretical investigation of CO(2) adsorption on Na-A zeolite
skos:notation
RIV/61388955:_____/11:00371375!RIV12-GA0-61388955
n18:predkladatel
n19:ico%3A61388955
n3:aktivita
n16:Z n16:P
n3:aktivity
P(GA203/08/0604), P(GA203/09/0143), Z(AV0Z40400503), Z(MSM0021620857)
n3:cisloPeriodika
1-3
n3:dodaniDat
n12:2012
n3:domaciTvurceVysledku
n14:6088252 n14:5283396 n14:7016662
n3:druhVysledku
n20:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
190895
n3:idVysledku
RIV/61388955:_____/11:00371375
n3:jazykVysledku
n17:eng
n3:klicovaSlova
Na-A-zeolite; carbon dioxide; adsorption
n3:klicoveSlovo
n11:adsorption n11:Na-A-zeolite n11:carbon%20dioxide
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[BCE50B6623E0]
n3:nazevZdroje
Microporous and Mesoporous Materials
n3:obor
n6:CF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
7
n3:projekt
n8:GA203%2F09%2F0143 n8:GA203%2F08%2F0604
n3:rokUplatneniVysledku
n12:2011
n3:svazekPeriodika
146
n3:tvurceVysledku
Pulido, A. Delgado, M. R. Nachtigall, P. Areán, C. O. Zukal, Arnošt Čejka, Jiří Mayerová, Jana
n3:wos
000295769400013
n3:zamer
n9:AV0Z40400503 n9:MSM0021620857
s:issn
1387-1811
s:numberOfPages
9
n15:doi
10.1016/j.micromeso.2011.03.034