About: Synthesis and adsorption investigations of zeolites MCM-22 and MCM-49 modified by alkali metal cations

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About: Synthesis and adsorption investigations of zeolites MCM-22 and MCM-49 modified by alkali metal cations Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. 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. (en) 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. (cs)
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 (en) Syntéza a adsorpční vlastnosti zeolitů MCM-22 a MCM-49 modifikovaných kationty alkalických kovů (cs)
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 (en) Syntéza a adsorpční vlastnosti zeolitů MCM-22 a MCM-49 modifikovaných kationty alkalických kovů (cs)
skos:notation	RIV/61388955:_____/07:00092685!RIV08-AV0-61388955
http://linked.open.../vavai/riv/strany	257;265
http://linked.open...avai/riv/aktivita	R Z
http://linked.open...avai/riv/aktivity	R, Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	3-4
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Zukal, Arnošt Čejka, Jiří Pawlesa, Justyna
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	453871
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/07:00092685
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	MCM-22 zeolite; MCM-49 zeolite; alkali metal cation exchange; N2 and CO2 adsorption (en)
http://linked.open.../riv/klicoveSlovo	MCM-49 zeolite N2 and CO2 adsorption alkali metal cation exchange MCM-22 zeolite
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[30FF05CC888F]
http://linked.open...i/riv/nazevZdroje	Adsorption-Journal of the International Adsorption Society
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	13
http://linked.open...iv/tvurceVysledku	Zukal, Arnošt Čejka, Jiří Pawlesa, Justyna
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	0929-5607
number of pages	9 (xsd:int)

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