Počet záznamů: 1
Acidic and catalytic properties of hierarchical zeolites and hybrid ordered mesoporous materials assembled from MFI protozeolitic units
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SYSNO ASEP 0359005 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Acidic and catalytic properties of hierarchical zeolites and hybrid ordered mesoporous materials assembled from MFI protozeolitic units Tvůrce(i) Serrano, D. P. (ES)
García, R. A. (ES)
Vicente, G. (ES)
Linares, M. (ES)
Vitvarová, Dana (UFCH-W) RID
Čejka, Jiří (UFCH-W) RID, ORCID, SAIZdroj.dok. Journal of Catalysis. - : Elsevier - ISSN 0021-9517
Roč. 279, č. 2 (2011), s. 366-380Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova hierarchical zeolites ; hybrid zeolitic-mesostructured materials ; Bronsted and Lewis acid centres Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000289919800015 DOI 10.1016/j.jcat.2011.02.007 Anotace Two types of MFI zeolitic materials with improved accessibility, hierarchical zeolites and hybrid ordered mesoporous materials are here compared in terms of textural, acidic and catalytic properties. In both cases, protozeolitic units were employed as starting building blocks, the growth of which was perturbed by a silanization agent (hierarchical ZSM-5) or controlled by assembling around surfactant micelles (hybrid ordered mesoporous material, HZM). Likewise, two standard samples (nanocrystalline ZSM-5 and Al-MCM-41) were used as reference. Nitrogen adsorption measurements confirmed the presence of a secondary porosity and a high share of non-microporous surface area in hierarchical ZSM-5, whereas no significant amount of micropores was detected in the hybrid HZM sample. However, 27Al MAS NMR measurements indicated that zeolitic fragments are present within the walls of the latter sample. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2012
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