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| rdf:type
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| Description
| - Alkali metal exchanged zeolites ZSM-5, X and Y were characterized by adsorption of pyrrole and tested in toluene side-chain alkylation with methanol. Adsorption of pyrrole followed by FTIR spectroscopy and gravimetry indicated that there exist at least two different adsorption sites for pyrrole in these zeolites depending on the aluminum distribution in the framework. With increasing size of the alkali metal cation (Li < K < Cs] the possibility for adsorption of pyrrole decreases, in particular for those ZSM-5 samples with a higher nSi/nAl ratio. The highest activities in toluene side-chain alkzlation with methanol were achieved over Cs-X and Cs-Y zeolites. With Cs-ZSM-5 (nSi/nAl = 14) some methylation activity was also observed. It is proposed that not only the higher electronegativity of the zeolite catalysts but also a proper distance between two neighboring Al atoms in ZSM-5 is required for the activation of the methyl group of toluene.
- Alkali metal exchanged zeolites ZSM-5, X and Y were characterized by adsorption of pyrrole and tested in toluene side-chain alkylation with methanol. Adsorption of pyrrole followed by FTIR spectroscopy and gravimetry indicated that there exist at least two different adsorption sites for pyrrole in these zeolites depending on the aluminum distribution in the framework. With increasing size of the alkali metal cation (Li < K < Cs] the possibility for adsorption of pyrrole decreases, in particular for those ZSM-5 samples with a higher nSi/nAl ratio. The highest activities in toluene side-chain alkzlation with methanol were achieved over Cs-X and Cs-Y zeolites. With Cs-ZSM-5 (nSi/nAl = 14) some methylation activity was also observed. It is proposed that not only the higher electronegativity of the zeolite catalysts but also a proper distance between two neighboring Al atoms in ZSM-5 is required for the activation of the methyl group of toluene. (en)
- Zeolity ZSM-5, X a Y vyměněné alkalickými kovy byly chrakterizovány adsorpcí pyrrolu a testovány v alkylaci postranního řetězce toluenu methanolem. Adsorpce pyrrolu spolu s FTIR spektroskopií a gravimetrií ukazuje, že v těchto zeolitech existují v závislosti na distribuci Al v mřížce alespoň dvě různá místa vhodná pro adsorpci pyrrolu. S rostoucí velikostí kationtu alkalického kovu (Li<K<Cs) klesá možnost adsorpce pyrrolu, zvláště pro vzorky ZSM-5 s vyšším poměrem nSi/nAl. Nejvyšší aktivitu v alkylaci postranního řetězce toluenu methanolem vykazovaly vzorky Cs-X a Cs-Y. U vzorku ZSM-5 s nSi/nAl=14 byla katalytická aktivita též pozorována. Předpokládáme, že u tohoto vzorku je pro aktivaci methylové skupiny v toluenu nutná nejen vyšší elektronegativita zeolitického katalyzátoru, ale také vhodná vzdálenost mezi dvěma sousedními atomy Al. (cs)
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| Title
| - Characterization of basic sites in zeolites for toluene side-chain alkylation with methanol
- Charakterizace bazických míst v zeolitech pro alkylaci toluenu methanolem do postranního řetězce (cs)
- Characterization of basic sites in zeolites for toluene side-chain alkylation with methanol (en)
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| skos:prefLabel
| - Characterization of basic sites in zeolites for toluene side-chain alkylation with methanol
- Charakterizace bazických míst v zeolitech pro alkylaci toluenu methanolem do postranního řetězce (cs)
- Characterization of basic sites in zeolites for toluene side-chain alkylation with methanol (en)
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| skos:notation
| - RIV/61388955:_____/05:00021929!RIV06-AV0-61388955
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - P(KJB4040402), Z(AV0Z40400503)
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/05:00021929
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - catalysis; zeolites; ZSM-5 (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - Studies in Surface Science and Catalysis
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...iv/tvurceVysledku
| - Čejka, Jiří
- Žilková, Naděžda
- Košová, Gabriela
- Ernst, S.
- Kotrla, Josef
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| http://linked.open...vavai/riv/typAkce
| |
| http://linked.open.../riv/zahajeniAkce
| |
| http://linked.open...n/vavai/riv/zamer
| |
| number of pages
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| http://purl.org/ne...btex#hasPublisher
| |
| https://schema.org/isbn
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