Počet záznamů: 1

The Effect of Zeolite Structure on the Activity and Selectivity in p-Xylene Alkylation with Isopropyl Alcohol

  1. 1.
    0330279 - UFCH-W 2010 RIV US eng J - Článek v odborném periodiku
    Musilová, Zuzana - Kubů, Martin - Burton, A. W. - Zones, S. I. - Voláková, Martina - Čejka, Jiří
    The Effect of Zeolite Structure on the Activity and Selectivity in p-Xylene Alkylation with Isopropyl Alcohol.
    Catalysis Letters. Roč. 131, 3-4 (2009), s. 393-400 ISSN 1011-372X
    Grant CEP: GA AV ČR 1QS400400560; GA ČR GD203/08/H032
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: SSZ-35 * SSZ-33 * p-xylene * alkylation
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 2.021, rok: 2009

    The effect of zeolite architecture and channel dimensionality on p-xylene conversion and selectivity to 1-isopropyl-2,5-dimethyl-benzene was investigated in p-xylene alkylation with isopropyl alcohol over novel zeolites SSZ-33 and SSZ-35. Catalytic behavior of these zeolites was compared with those of zeolites Beta, mordenite, ZSM-11 and ZSM-5. It was found that p-xylene conversion increases with increasing pore size and connectivity of the channel system of individual zeolites with the exception of SSZ-35, which possesses a system of one-dimensional 10-ring channels that periodically open into wide, shallow cavities circumscribed by 18-rings. SSZ-35 exhibited the highest conversion among all zeolites at the reaction temperature of 150 degrees C and also the highest selectivity to 1-isopropyl-2,5-dimethyl-benzene. Molecular modeling confirmed the dimensions of the 18-ring cages are optimal for the formation of this alkylation product.
    Trvalý link: http://hdl.handle.net/11104/0176107