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| Description
| - Immobilization of ethylene in the channel system of HZSM-5 was evaluated from the breakthrough curves of ethylene and desorption curves of ethylene transformation products measured on a zeolite bed between 308 K and 523 K. The kinetics of the overall immobilization/mobilization reaction was measured on a series of HZSM-5 samples in an integral flow reactor with a fixed bed of zeolite at 623 K. The aluminum content of the samples ranged from 3.2 to 6.4 Al atoms per unit cell. The zeolites were characterized by XRD, SEM, chemical analysis, Al-27 MAS NMR, water sorption, TPD of NH3 and FTIR spectroscopy. The results of kinetic measurements are represented by a family of S-shaped curves plotted as ethylene conversion versus contact time. The form of the curves suggests a contribution of an autocatalytic rate step to the kinetics. The length of the induction period increases with increasing crystal size and decreasing aluminum content in the catalyst...
- Immobilization of ethylene in the channel system of HZSM-5 was evaluated from the breakthrough curves of ethylene and desorption curves of ethylene transformation products measured on a zeolite bed between 308 K and 523 K. The kinetics of the overall immobilization/mobilization reaction was measured on a series of HZSM-5 samples in an integral flow reactor with a fixed bed of zeolite at 623 K. The aluminum content of the samples ranged from 3.2 to 6.4 Al atoms per unit cell. The zeolites were characterized by XRD, SEM, chemical analysis, Al-27 MAS NMR, water sorption, TPD of NH3 and FTIR spectroscopy. The results of kinetic measurements are represented by a family of S-shaped curves plotted as ethylene conversion versus contact time. The form of the curves suggests a contribution of an autocatalytic rate step to the kinetics. The length of the induction period increases with increasing crystal size and decreasing aluminum content in the catalyst... (en)
- Imobilizace etylénu v kanálovém systému HZSM-5 byla vyhodnocena z průnikových křivek etylénu a z desorpčních křivek produktů transformace etylénu z lože zeolitu měřených při teplotách mezi 308 K a 523 K. Kinetika celkové mobilizační/imobilizační reakce byla měřena na serii HZSM-5 vzorků v integrálním průtokovém reaktoru s pevným ložem při 623 K. Obsah hliníku ve vzorcích se pohyboval v rozmezí od 3.2 do 6.4 hliníkových atomů na jednotkovou celu. Zeolity byly charakterizovány pomocí XRD, SEM, chemické analýzy, 27Al MAS NMR, sorpce vody, TPD amoniaku a FTIR spektroskopie. Výsledku kinetických měření byly reprezentovány soustavou křivek tvatu S vynesených jako konverze etylénu proti době kontaktu. Tvar křivek naznačuje, že ke kinetice přispívá autokatalytický stupeň. Délka indukované periody roste s rostoucí velikostí krystalu a s klesajícím obsahem hliníku v katalyzátoru. Kinetické křivky pro krystaly se stejným obsahem Al silně závisí na velikosti krystalu. ... (cs)
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| Title
| - The effect of immobilization/mobilization processes on the temperature onset of a catalyst bed production studied with ethylene oligomerization on HZSM-5 zeolites
- Vliv mobilizačních/imobilizačních procesů na teplotní práh produkce lože katalyzátoru studovaný pomocí oligomerace etylénu na HZSM-5 zeolitech (cs)
- The effect of immobilization/mobilization processes on the temperature onset of a catalyst bed production studied with ethylene oligomerization on HZSM-5 zeolites (en)
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| skos:prefLabel
| - The effect of immobilization/mobilization processes on the temperature onset of a catalyst bed production studied with ethylene oligomerization on HZSM-5 zeolites
- Vliv mobilizačních/imobilizačních procesů na teplotní práh produkce lože katalyzátoru studovaný pomocí oligomerace etylénu na HZSM-5 zeolitech (cs)
- The effect of immobilization/mobilization processes on the temperature onset of a catalyst bed production studied with ethylene oligomerization on HZSM-5 zeolites (en)
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| skos:notation
| - RIV/61388955:_____/06:00040964!RIV07-AV0-61388955
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(IAA400400501), Z(AV0Z40400503)
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| http://linked.open...iv/cisloPeriodika
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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:_____/06:00040964
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - HZSM-5; ethylene; oligomeration; sorption and reaction dynamics (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Kočiřík, Milan
- Hrabánek, Pavel
- Zikánová, Arlette
- Hudec, P.
- Derewinski, M.
- Sarv, P.
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| is http://linked.open...avai/riv/vysledek
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