Enhancement of Activity and Selectivity in Acid-Catalyzed Reactions by Dealuminated Hierarchical Zeolites

0420720 - ÚFCH JH 2014 RIV DE eng J - Journal Article
Sazama, Petr - Sobalík, Zdeněk - Dědeček, Jiří - Jakubec, Ivo - Parvulescu, V. I. - Bastl, Zdeněk - Rathouský, Jiří - Jirglová, Hana
Enhancement of Activity and Selectivity in Acid-Catalyzed Reactions by Dealuminated Hierarchical Zeolites.
Angewandte Chemie - International Edition. Roč. 52, č. 7 (2013), s. 2038-2041. ISSN 1433-7851. E-ISSN 1521-3773
R&D Projects: GA ČR GAP106/11/0624; GA MPO FR-TI3/316
Institutional support: RVO:61388955 ; RVO:61388980
Keywords : alkylation * cracking * dealumination
Subject RIV: CF - Physical ; Theoretical Chemistry; CA - Inorganic Chemistry (UACH-T)
Impact factor: 11.336, year: 2013

High-silica zeolites with crystalline aluminosilicate frame- works balance the charge of strongly acidic protons during the processing of oil, in petrochemistry, and increasingly in numerous organic syntheses. The transformation of hydro- carbons is controlled by the concentration and strength of the acid sites and the dimensions and architecture of the inner pores. Zeolite micropores, which have a diameter similar to organic molecules, govern the shape selectivity of the reaction in the inner space, but also result in slow transport of reactants and products, thus limiting the reaction rate. [1] Several approaches have been developed to enhance the mass transport by using zeolite nanosheets and nanocrystals, [2–4] or zeolites that contain both micro- and mesopores. The latter hierarchical zeolites were prepared by confined crystal growth, [5,6] by using polymers as mesoporogens, [7] or through post-synthesis desilication or dealumination processes.
Permanent Link: http://hdl.handle.net/11104/0227218