About: Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites

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About: Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Al-rich template-free BEA* zeolite (Si/Al 4.6) was synthesized and its structure was analyzed in comparison with the conventional H-BEA* zeolite of Si/Al 11.3 using XRD, N2 sorption, SEM, FTIR, 27Al 3Q and 29Si MAS NMR spectroscopy, and DFT calculation of the deprotonation energies. The Al-rich H-BEA* exhibited a high concentration of Brønsted and Lewis sites, both of high acid strength, although AlSiAl sequences were present in the framework. In Al-rich Fe-BEA* the exchanged Fe ions, Fe-oxo species, and Fe-oxo oligomers were identified by UV-vis spectroscopy. Cracking of n-decane, alkylation of benzene with benzyl alcohol and hydroamination of styrene with aniline to (anti)Markovnikov phenyl-[2-phenylethyl]amine over H-BEA , and decomposition of N2O and NH 3-SCR-NOx over Fe-BEA were investigated in relation to the concentration and nature of acid and Fe-redox sites. The high concentration of Al-related active sites and the highly regular structure of Al-rich beta zeolite are directly manifested in enhanced activity compared with conventional Si-rich beta zeolite. Al-rich template-free BEA* zeolite (Si/Al 4.6) was synthesized and its structure was analyzed in comparison with the conventional H-BEA* zeolite of Si/Al 11.3 using XRD, N2 sorption, SEM, FTIR, 27Al 3Q and 29Si MAS NMR spectroscopy, and DFT calculation of the deprotonation energies. The Al-rich H-BEA* exhibited a high concentration of Brønsted and Lewis sites, both of high acid strength, although AlSiAl sequences were present in the framework. In Al-rich Fe-BEA* the exchanged Fe ions, Fe-oxo species, and Fe-oxo oligomers were identified by UV-vis spectroscopy. Cracking of n-decane, alkylation of benzene with benzyl alcohol and hydroamination of styrene with aniline to (anti)Markovnikov phenyl-[2-phenylethyl]amine over H-BEA , and decomposition of N2O and NH 3-SCR-NOx over Fe-BEA were investigated in relation to the concentration and nature of acid and Fe-redox sites. The high concentration of Al-related active sites and the highly regular structure of Al-rich beta zeolite are directly manifested in enhanced activity compared with conventional Si-rich beta zeolite. (en)
Title	Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites (en)
skos:prefLabel	Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites (en)
skos:notation	RIV/61388955:_____/14:00432631!RIV15-GA0-61388955
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GA14-10251S), P(GAP106/11/0624), P(TA01021377)
http://linked.open...iv/cisloPeriodika	OCT 2014
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Klein, Petr Wichterlová, Blanka Sklenák, Štěpán Sazama, Petr Dědeček, Jiří Sádovská, Galina Šťastný, Petr Pashková, Veronika
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	1450
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/14:00432631
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Acid strength; Alkylation of aromatics; Beta zeolite (en)
http://linked.open.../riv/klicoveSlovo	Beta zeolite Acid strength Alkylation of aromatics
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[9F19A1349EF0]
http://linked.open...i/riv/nazevZdroje	Journal of Catalysis
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	8 (xsd:int)
http://linked.open...cetTvurcuVysledku	10 (xsd:int)
http://linked.open...vavai/riv/projekt	New category of zeolites with pentasil ring structure: Catalytic processes on zeolites with controlled distribution of aluminum atoms in the framework Development of a process for the abatement of nitrogen oxides for industrial applications for especially demanding conditions. Catalysts for eliminating N2O in the high temperature regime in the production technology of nitric acid
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	318
http://linked.open...iv/tvurceVysledku	Dědeček, Jiří Klein, Petr Sazama, Petr Sklenák, Štěpán Wichterlová, Blanka Šťastný, Petr Sádovská, Galina Parvulescu, V. I. Pashková, Veronika Candu, N.
http://linked.open...ain/vavai/riv/wos	000343360800003
issn	0021-9517
number of pages	12 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jcat.2014.06.024

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