Počet záznamů: 1

The Role of Template Structure and Synergism between Inorganic and Organic Structure Directing Agents in the Synthesis of UTL Zeolite

  1. 1.
    0343596 - UFCH-W 2011 RIV US eng J - Článek v odborném periodiku
    Shvets, O. V. - Kasian, N. - Zukal, Arnošt - Pinkas, Jiří - Čejka, Jiří
    The Role of Template Structure and Synergism between Inorganic and Organic Structure Directing Agents in the Synthesis of UTL Zeolite.
    Chemistry of Materials. Roč. 22, č. 11 (2010), s. 3482-3495 ISSN 0897-4756
    Grant CEP: GA ČR GA203/08/0604; GA ČR GA104/07/0383
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: UTL zeolite * synthesis * zeolite molecular sietes
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 6.400, rok: 2010

    The extra-large-pore germanosilicates with UTL topology have been synthesized using a large variety of spiroazocompounds as structure-directing agents. Synthesis conditions were optimized and zeolites with a high crystallinity degree were obtained with 13 different organic structure-directing agents. The influence of the composition of the reaction mixture and template nature (structure, hydrophilicity/hydrophobicity balance, rigidity, pKa) on the phase selectivity, crystallinity degree, and adsorption properties of zeolites with UTL structure was investigated. Selection criteria of organic molecules as potential structure-directing agents (SDAs) in the synthesis of large-pore and extra-large-pore zeolites from silicate and germanosilicate media are proposed. The optimum synthesis time was determined to be 4−9 days for different SDA and (Si + Ge)/SDA molar ratios.
    Trvalý link: http://hdl.handle.net/11104/0186041