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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F07%3A00087064%21RIV08-AV0-61388955
rdf:type
skos:Concept n19:Vysledek
dcterms:description
Katalyzátory metatezí na bázi oxidu rhenistého naneseného na organizovanou mezoporézní aluminu (OMA) byly charakterizovány následujícími metodami: difrakcí rentgenového záření (XRD), rentgenovou fotoelektronovou spektroskopií (XPS), FTIR spektroskopií, MAS NMR spektroskopií a adsorpcí dusíku s cílem porozumět změnám texturních a chemických vlastností uvedených katalyzátorů, a to jak v procesu jejich aktivace tak v průběhu reakce metateze olefinů. Přítomnost pentakoordinovaného Al, četnost kyselých OH skupin, koncentrace Lewisových kyselých center a redukovatelnost Re 7+ na Re 4+ na povrchu OMA představují hlavní vlastnosti diskutované v souvislosti s katalytickou aktivitou. Metathesis catalysts based on Re(VII)oxide supported on organized mesoporous alumina (OMA) were characterized by a number of experimental techniques including X-ray diffraction (XRD), X-ray photoelectron (XPS) and FTIR spectroscopy, MAS NMR, and nitrogen isotherms to understand the changes in textural and chemical properties during the activation and the metathesis reaction of olefins. The presence of pentacoordinated Al, population of acidic OH groups, concentration of Lewis acid sites and reducibility of Re (VII) oxide to Re(IV) species in OMA based catalysts – there are the main features, which were discussed in connection with catalytic activity. Metathesis catalysts based on Re(VII)oxide supported on organized mesoporous alumina (OMA) were characterized by a number of experimental techniques including X-ray diffraction (XRD), X-ray photoelectron (XPS) and FTIR spectroscopy, MAS NMR, and nitrogen isotherms to understand the changes in textural and chemical properties during the activation and the metathesis reaction of olefins. The presence of pentacoordinated Al, population of acidic OH groups, concentration of Lewis acid sites and reducibility of Re (VII) oxide to Re(IV) species in OMA based catalysts – there are the main features, which were discussed in connection with catalytic activity.
dcterms:title
Charakterizace texturních a povrchových vlastností mesoporézních katalyzátorů metatezí Characterization of textural and surface properties of mesoporous metathesis catalysis Characterization of textural and surface properties of mesoporous metathesis catalysis
skos:prefLabel
Characterization of textural and surface properties of mesoporous metathesis catalysis Charakterizace texturních a povrchových vlastností mesoporézních katalyzátorů metatezí Characterization of textural and surface properties of mesoporous metathesis catalysis
skos:notation
RIV/61388955:_____/07:00087064!RIV08-AV0-61388955
n4:strany
1145;1152
n4:aktivita
n14:Z n14:P
n4:aktivity
P(FT-TA/042), P(IAA4040411), Z(AV0Z40400503)
n4:dodaniDat
n15:2008
n4:domaciTvurceVysledku
n8:7579543 n8:9745645 n8:4940717 n8:4766350 n8:6503284 n8:7016662 n8:5283396 n8:9628983
n4:druhVysledku
n20:C
n4:duvernostUdaju
n11:S
n4:entitaPredkladatele
n5:predkladatel
n4:idSjednocenehoVysledku
413360
n4:idVysledku
RIV/61388955:_____/07:00087064
n4:jazykVysledku
n18:eng
n4:klicovaSlova
catalysis; zeolites; metathesis
n4:klicoveSlovo
n7:zeolites n7:metathesis n7:catalysis
n4:kontrolniKodProRIV
[39198904A770]
n4:mistoVydani
Amsterdam
n4:nazevEdiceCisloSvazku
Studies in surface science and catalysis
n4:nazevZdroje
From Zeolites to Porous MOF Materials - the 40th Anniversary of International Zeolite Conference
n4:obor
n6:CF
n4:pocetDomacichTvurcuVysledku
8
n4:pocetTvurcuVysledku
8
n4:projekt
n13:FT-TA%2F042 n13:IAA4040411
n4:rokUplatneniVysledku
n15:2007
n4:tvurceVysledku
Dědeček, Jiří Balcar, Hynek Zukal, Arnošt Bastl, Zdeněk Hamtil, Roman Brabec, Libor Čejka, Jiří Žilková, Naděžda
n4:zamer
n17:AV0Z40400503
s:numberOfPages
8
n9:hasPublisher
Elsevier
n10:isbn
978-0-444-53068-4