Incorporation of Aluminum and Iron into the ZSM-12 Zeolite: Synthesis and Characterization of Acid Sites.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F02%3A54020245" target="_blank" >RIV/61388955:_____/02:54020245 - 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

Incorporation of Aluminum and Iron into the ZSM-12 Zeolite: Synthesis and Characterization of Acid Sites.

Popis výsledku v původním jazyce

Zeolite ZSM-12 with aluminum and iron in the framework was synthesized in a broad range of Si/Al (Fe) ratios using methyltriethylammonium bromide as structure-directing agent with the aim to characterize the type and concentration of acid sites in dependence on Si/Al (Fe) ratios and calcination procedures. It was shown that the minimum Si/Al ratio achieved for (Al)ZSM-12 is around 35, which is very close to minimum Si/Fe ratio of about 37 for (Fe)ZSM-12. The rate of crystallization of (Al) and (Fe)ZSM-12 depends on the concentration of Al and Fe in the reaction mixture of these trivalent cations, the slower was the apparent crystallization rate. It is suggested that the crystallization rate is controlled by the number of nucleation centers, which depends on the amount of trivalent cations (Al, Fe) . Zeolites (Al) and (Fe)ZSM-12 were calcined under a variety of carefully controlled conditions to investigate the resulting concentration of Broensted and Lewis acid sites.

Název v anglickém jazyce

Incorporation of Aluminum and Iron into the ZSM-12 Zeolite: Synthesis and Characterization of Acid Sites.

Popis výsledku anglicky

Zeolite ZSM-12 with aluminum and iron in the framework was synthesized in a broad range of Si/Al (Fe) ratios using methyltriethylammonium bromide as structure-directing agent with the aim to characterize the type and concentration of acid sites in dependence on Si/Al (Fe) ratios and calcination procedures. It was shown that the minimum Si/Al ratio achieved for (Al)ZSM-12 is around 35, which is very close to minimum Si/Fe ratio of about 37 for (Fe)ZSM-12. The rate of crystallization of (Al) and (Fe)ZSM-12 depends on the concentration of Al and Fe in the reaction mixture of these trivalent cations, the slower was the apparent crystallization rate. It is suggested that the crystallization rate is controlled by the number of nucleation centers, which depends on the amount of trivalent cations (Al, Fe) . Zeolites (Al) and (Fe)ZSM-12 were calcined under a variety of carefully controlled conditions to investigate the resulting concentration of Broensted and Lewis acid sites.

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/IAA4040001" target="_blank" >IAA4040001: Bazická molekulová síta pro selektivní alkylaci toluenu do postranního řetězce</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

2002

Kód důvěrnosti údajů

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

Název periodika

Collection of Czechoslovak Chemical Commmunications

ISSN

0010-0765

e-ISSN

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Svazek periodika

67

Číslo periodika v rámci svazku

N/A

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

18

Strana od-do

1760-1778

Kód UT WoS článku

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EID výsledku v databázi Scopus

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