caa a22 4500 463170245 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10450-007-9023-7 doi (NATIONALLICENCE)springer-10.1007/s10450-007-9023-7 Synthesis and adsorption investigations of zeolites MCM-22 andMCM-49 modified by alkali metal cations [Elektronische Daten] [Justyna Pawlesa, Arnošt Zukal, Jiří Čejka] 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. Springer Science+Business Media, LLC, 2007 MCM-22 zeolite nationallicence MCM-49 zeolite nationallicence Alkali metal cation exchange nationallicence N2 and CO2 adsorption nationallicence S BET : BET surface area, m2/g nationallicence S external : external surface area, m2/g nationallicence V total : total pore volume, cm3/g nationallicence V micro : micropore volume, cm3/g nationallicence K H : Henry's constant, cm3/g STP nationallicence Pawlesa Justyna J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i., Dolejškova 3, 182 23, Prague 8, Czech Republic aut Zukal Arnošt J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i., Dolejškova 3, 182 23, Prague 8, Czech Republic aut Čejka Jiří J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i., Dolejškova 3, 182 23, Prague 8, Czech Republic aut Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 257-265 0929-5607 13:3-4<257 2007 13 10450 https://doi.org/10.1007/s10450-007-9023-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9023-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pawlesa Justyna J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i., Dolejškova 3, 182 23, Prague 8, Czech Republic aut NATIONALLICENCE 700 1- Zukal Arnošt J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i., Dolejškova 3, 182 23, Prague 8, Czech Republic aut NATIONALLICENCE 700 1- Čejka Jiří J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i., Dolejškova 3, 182 23, Prague 8, Czech Republic aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 257-265 0929-5607 13:3-4<257 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer