Počet záznamů: 1
The decisive role of the distribution of Al in the framework of beta zeolites on the structure and activity of Co ion species in propane-SCR-NOx in the presence of water vapour
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SYSNO ASEP 0357798 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The decisive role of the distribution of Al in the framework of beta zeolites on the structure and activity of Co ion species in propane-SCR-NOx in the presence of water vapour Tvůrce(i) Čapek, Libor (UFCH-W)
Dědeček, Jiří (UFCH-W) RID, ORCID
Sazama, Petr (UFCH-W) RID, ORCID
Wichterlová, Blanka (UFCH-W) RIDZdroj.dok. Journal of Catalysis. - : Elsevier - ISSN 0021-9517
Roč. 272, č. 1 (2010), s. 44-54Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Co-beta zeolites ; Al distribution ; SCR-NOx Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP KAN100400702 GA AV ČR - Akademie věd IAA400400904 GA AV ČR - Akademie věd CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000279090500006 DOI 10.1016/j.jcat.2010.03.013 Anotace The role of the distribution of aluminium in the framework of beta zeolites in the formation of various types of counter Co species of different activity in C3H8-SCR-NO in the absence/presence of 10% water vapour was investigated. Different concentrations of Al atoms in the Al-O-(Si-O)(2)-Al sequences in one ring (Al pairs) and isolated Al atoms in Al-O-(Si-O)(n>2)-Al sequences located in two framework rings of parent BEA* zeolites were obtained by variation of the zeolite synthesis and by post-synthesis dealumination. Al atoms in the framework and their distribution were characterized by the combination of Si-29 MAS NMR of the parent BEA* zeolites and UV-Vis spectroscopy of the maximum-Co(II)-loaded BEA*. The concentration of Al pairs corresponded to the concentration of bare Co(II) ions in dehydrated maximum exchanged-Co(II)-BEA* calculated from the Vis spectra. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2011
Počet záznamů: 1