Počet záznamů: 1

Alkali metal cation doped Al-SBA-15 for carbon dioxide adsorption

  1. 1.
    0356990 - UFCH-W 2011 RIV GB eng J - Článek v odborném periodiku
    Zukal, Arnošt - Mayerová, Jana - Čejka, Jiří
    Alkali metal cation doped Al-SBA-15 for carbon dioxide adsorption.
    Physical Chemistry Chemical Physics. Roč. 12, č. 20 (2010), s. 5240-5247 ISSN 1463-9076
    Grant CEP: GA ČR GA203/08/0604
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: mesoporous molecular sieves * zeolites * CO2 adsorption
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 3.454, rok: 2010

    Mesoporous aluminosilicate adsorbents for carbon dioxide were prepared by the grafting of aluminium into SBA-15 silica using an aqueous solution of aluminium chlorohydrate. As the ion exchange sites are primarily associated with the presence of tetrahedrally coordinated aluminium, extra-framework aluminium on the SBA-15 surface was inserted into the silica matrix by a treatment with an aqueous solution of NH4OH. Synthesized mesoporous aluminosilicate preserving all the characteristic features of a mesoporous molecular sieve was finally modified by the alkali metal cation exchange. To examine carbon dioxide adsorption on prepared materials, adsorption isotherms in the temperature range from 0 degrees C to 60 degrees C were measured. Based on the known temperature dependence of adsorption isotherms, isosteric adsorption heats giving information on the surface energetics of CO2 adsorption were calculated and discussed.
    Trvalý link: http://hdl.handle.net/11104/0195368