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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F07%3A00092685%21RIV08-AV0-61388955
rdf:type
n16:Vysledek skos:Concept
dcterms:description
Ion exchange was made on MCM-22 and MCM-49 zeolites with different Si/Al molar ratios, with Li+, Na+, K+, and Cs+ ions and the study of the influence of alkali metal cations on CO2 adsorption properties was performed. The degree of ion-exchange decreased for larger cations (Cs+) apparently due to steric hindrances. The exchange with different cations led to a decrease in the surface area and the micropore volume. Our study shows that the adsorption capacity of the tested zeolites depends significantly on the nature and the concentration of the charge-compensating cations. The highest CO2 adsorption capacity was obtained on the MWW zeolites with the lowest Si/Al molar ratio and the Li+ or K+ cations. Adsorpce oxidu uhličitého byla studována na zeolitech MCM-22 a MCM-49 s kationty Li+, Na+, K+ a Cs+. U objemných kationtů (Cs) byl v důsledku sterických zábran stupeň iontové výměny snížen. Iontová výměna vedla ke snížení plochy povrchu a objemu mikropórů. Provedená studie ukázala, že adsorpční kapacita významně závisí na povaze a koncentraci kationtů. Nejvyšší adsorpční kapacita pro CO2 byla nalezena u MWW zeolitů s nejnižším poměrem Si/Al a s Li+ nebo K+ kationty. Ion exchange was made on MCM-22 and MCM-49 zeolites with different Si/Al molar ratios, with Li+, Na+, K+, and Cs+ ions and the study of the influence of alkali metal cations on CO2 adsorption properties was performed. The degree of ion-exchange decreased for larger cations (Cs+) apparently due to steric hindrances. The exchange with different cations led to a decrease in the surface area and the micropore volume. Our study shows that the adsorption capacity of the tested zeolites depends significantly on the nature and the concentration of the charge-compensating cations. The highest CO2 adsorption capacity was obtained on the MWW zeolites with the lowest Si/Al molar ratio and the Li+ or K+ cations.
dcterms:title
Synthesis and adsorption investigations of zeolites MCM-22 and MCM-49 modified by alkali metal cations Synthesis and adsorption investigations of zeolites MCM-22 and MCM-49 modified by alkali metal cations Syntéza a adsorpční vlastnosti zeolitů MCM-22 a MCM-49 modifikovaných kationty alkalických kovů
skos:prefLabel
Synthesis and adsorption investigations of zeolites MCM-22 and MCM-49 modified by alkali metal cations Synthesis and adsorption investigations of zeolites MCM-22 and MCM-49 modified by alkali metal cations Syntéza a adsorpční vlastnosti zeolitů MCM-22 a MCM-49 modifikovaných kationty alkalických kovů
skos:notation
RIV/61388955:_____/07:00092685!RIV08-AV0-61388955
n4:strany
257;265
n4:aktivita
n11:R n11:Z
n4:aktivity
R, Z(AV0Z40400503)
n4:cisloPeriodika
3-4
n4:dodaniDat
n9:2008
n4:domaciTvurceVysledku
Pawlesa, Justyna n17:7016662 n17:5283396
n4:druhVysledku
n8:J
n4:duvernostUdaju
n5:S
n4:entitaPredkladatele
n14:predkladatel
n4:idSjednocenehoVysledku
453871
n4:idVysledku
RIV/61388955:_____/07:00092685
n4:jazykVysledku
n12:eng
n4:klicovaSlova
MCM-22 zeolite; MCM-49 zeolite; alkali metal cation exchange; N2 and CO2 adsorption
n4:klicoveSlovo
n6:MCM-49%20zeolite n6:MCM-22%20zeolite n6:N2%20and%20CO2%20adsorption n6:alkali%20metal%20cation%20exchange
n4:kodStatuVydavatele
NL - Nizozemsko
n4:kontrolniKodProRIV
[30FF05CC888F]
n4:nazevZdroje
Adsorption-Journal of the International Adsorption Society
n4:obor
n15:CF
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
3
n4:rokUplatneniVysledku
n9:2007
n4:svazekPeriodika
13
n4:tvurceVysledku
Pawlesa, Justyna Zukal, Arnošt Čejka, Jiří
n4:zamer
n10:AV0Z40400503
s:issn
0929-5607
s:numberOfPages
9