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Statements

Subject Item
n2:RIV%2F00216275%3A25310%2F11%3A39892369%21RIV12-GA0-25310___
rdf:type
skos:Concept n4:Vysledek
dcterms:description
Adsorption of CO2 as probe molecule on alkali-metal zeolites of MFI structure was investigated by joint volumetry-calorimetry. Consideration was given to the interpretation of the heat evolved when a probe molecule is adsorbed on the surface. In particular, the number and the strength of adsorption sites are discussed as functions of zeolite structure, concentration, and nature of extra-framework cation. The adsorption heats (qiso) of CO2 interaction with alkali-metal cations decrease for MFI zeolite with high Si/Al in the sequence Li+ } Na+ } K+ from 54 kJ/mol to 49 and 43 kJ/mol, respectively. In addition, the adsorption heats are influenced by concentration of Al in the framework. This phenomenon is attributed to formation of bridged CO2 adsorption complexes formed between two cations. On the base of quantitative analysis of adsorption processes, presence of geminal adsorption complexes was suggested for adsorption at higher equilibrium pressures. Adsorption of CO2 as probe molecule on alkali-metal zeolites of MFI structure was investigated by joint volumetry-calorimetry. Consideration was given to the interpretation of the heat evolved when a probe molecule is adsorbed on the surface. In particular, the number and the strength of adsorption sites are discussed as functions of zeolite structure, concentration, and nature of extra-framework cation. The adsorption heats (qiso) of CO2 interaction with alkali-metal cations decrease for MFI zeolite with high Si/Al in the sequence Li+ } Na+ } K+ from 54 kJ/mol to 49 and 43 kJ/mol, respectively. In addition, the adsorption heats are influenced by concentration of Al in the framework. This phenomenon is attributed to formation of bridged CO2 adsorption complexes formed between two cations. On the base of quantitative analysis of adsorption processes, presence of geminal adsorption complexes was suggested for adsorption at higher equilibrium pressures.
dcterms:title
Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry
skos:prefLabel
Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry
skos:notation
RIV/00216275:25310/11:39892369!RIV12-GA0-25310___
n4:predkladatel
n5:orjk%3A25310
n3:aktivita
n17:P
n3:aktivity
P(GA203/09/0143), P(LC512)
n3:cisloPeriodika
2
n3:dodaniDat
n7:2012
n3:domaciTvurceVysledku
n6:1364332 n6:7420900 n6:3414094 n6:9333312
n3:druhVysledku
n14:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
233024
n3:idVysledku
RIV/00216275:25310/11:39892369
n3:jazykVysledku
n20:eng
n3:klicovaSlova
Calorimetry; MFI; Zeolite; CCS; Carbon dioxide; Heat; Adsorption
n3:klicoveSlovo
n11:Heat n11:Carbon%20dioxide n11:Adsorption n11:Zeolite n11:CCS n11:Calorimetry n11:MFI
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[2CCD85CEB829]
n3:nazevZdroje
Journal of Thermal Analysis and Calorimetry (Paper)
n3:obor
n18:CF
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n19:LC512 n19:GA203%2F09%2F0143
n3:rokUplatneniVysledku
n7:2011
n3:svazekPeriodika
105
n3:tvurceVysledku
Frýdová, Eva Bulánek, Roman Frolich, Karel Čičmanec, Pavel
n3:wos
000293213000009
s:issn
1388-6150
s:numberOfPages
7
n16:doi
10.1007/s10973-010-1108-y
n9:organizacniJednotka
25310