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Control of metal ion species in zeolites by distribution of aluminium in the framework: From structural analysis to performance under real conditions of SCR-NOx and NO, N2O decomposition
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SYSNO ASEP 0358402 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Control of metal ion species in zeolites by distribution of aluminium in the framework: From structural analysis to performance under real conditions of SCR-NOx and NO, N2O decomposition Author(s) Dědeček, Jiří (UFCH-W) RID, ORCID
Čapek, Libor (UFCH-W)
Sazama, Petr (UFCH-W) RID, ORCID
Sobalík, Zdeněk (UFCH-W) RID
Wichterlová, Blanka (UFCH-W) RIDSource Title Applied Catalysis A - General. - : ELSEVIER SCIENCE BV - ISSN 0926-860X
Roč. 391, 1-2 (2011), s. 244-253Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords zeolites ; Co-BEA ; Cu-MFI Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects KAN100400702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) IAA400400904 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000286856600030 DOI 10.1016/j.apcata.2010.06.026 Annotation The structure, properties and activity of the counter Co, Cu and Fe ion species depending on the distribution of aluminium atoms in the framework between Al pairs of Al-O-(Si-O)(2)-Al sequences in one ring and isolated Al atoms (Al-O-(Si-O)(n>2)-Al sequences) in two rings are analyzed. The effect of the Al distribution on the activity of metal ion species is investigated for reactions of technology importance, i.e. SCR-NOx by propane, and decomposition of NO and N2O under real conditions of NOx streams. Zeolite samples of BEA, MFI and FER structures, of similar composition for each topology, but with basically different distribution of Al atoms in the framework, were either selected from commercial samples or prepared by the developed synthesis. The concentration of Al pairs and isolated Al atoms in the framework was determined by the combination of Si-29 MAS NMR and quantitative analysis of the Vis spectra of dehydrated Co-zeolites with Co(II) ions exchanged to a maximum degree. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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