Vliv mobilizačních/imobilizačních procesů na teplotní práh produkce lože katalyzátoru studovaný pomocí oligomerace etylénu na HZSM-5 zeolitech

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F06%3A00040964" target="_blank" >RIV/61388955:_____/06:00040964 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The effect of immobilization/mobilization processes on the temperature onset of a catalyst bed production studied with ethylene oligomerization on HZSM-5 zeolites

Popis výsledku v původním jazyce

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...

Název v anglickém jazyce

The effect of immobilization/mobilization processes on the temperature onset of a catalyst bed production studied with ethylene oligomerization on HZSM-5 zeolites

Popis výsledku anglicky

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...

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/IAA400400501" target="_blank" >IAA400400501: Spřažení difuzních toků v porézních membránách a katalyzátorech a jejich studium pomocí permeace a NMR techniky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

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Svazek periodika

114

Číslo periodika v rámci svazku

2-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

248-256

Kód UT WoS článku

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EID výsledku v databázi Scopus

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