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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F14%3A00432631%21RIV15-GA0-61388955
rdf:type
skos:Concept n18:Vysledek
dcterms: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.
dcterms: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
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
skos:notation
RIV/61388955:_____/14:00432631!RIV15-GA0-61388955
n3:aktivita
n11:P n11:I
n3:aktivity
I, P(GA14-10251S), P(GAP106/11/0624), P(TA01021377)
n3:cisloPeriodika
OCT 2014
n3:dodaniDat
n5:2015
n3:domaciTvurceVysledku
n4:3857816 n4:5630134 n4:9628983 n4:8844380 n4:1929453 n4:2980312 Pashková, Veronika n4:1437402
n3:druhVysledku
n12:J
n3:duvernostUdaju
n6:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
1450
n3:idVysledku
RIV/61388955:_____/14:00432631
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Acid strength; Alkylation of aromatics; Beta zeolite
n3:klicoveSlovo
n10:Acid%20strength n10:Alkylation%20of%20aromatics n10:Beta%20zeolite
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[9F19A1349EF0]
n3:nazevZdroje
Journal of Catalysis
n3:obor
n14:CF
n3:pocetDomacichTvurcuVysledku
8
n3:pocetTvurcuVysledku
10
n3:projekt
n13:TA01021377 n13:GAP106%2F11%2F0624 n13:GA14-10251S
n3:rokUplatneniVysledku
n5:2014
n3:svazekPeriodika
318
n3:tvurceVysledku
Sklenák, Štěpán Sazama, Petr Šťastný, Petr Klein, Petr Dědeček, Jiří Sádovská, Galina Wichterlová, Blanka Pashková, Veronika Candu, N. Parvulescu, V. I.
n3:wos
000343360800003
s:issn
0021-9517
s:numberOfPages
12
n15:doi
10.1016/j.jcat.2014.06.024