Incorporation of Al at ZSM-5 hydrothermal synthesis. Tuning of Al pairs in the framework

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F15%3A00433272" target="_blank" >RIV/61388955:_____/15:00433272 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62243136:_____/15:MPO11CL

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.micromeso.2014.09.056" target="_blank" >http://dx.doi.org/10.1016/j.micromeso.2014.09.056</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.micromeso.2014.09.056" target="_blank" >10.1016/j.micromeso.2014.09.056</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Incorporation of Al at ZSM-5 hydrothermal synthesis. Tuning of Al pairs in the framework

Popis výsledku v původním jazyce

The effect of Si- (TEOS, Tixosil and Na-silicate), Al- (AlCl3, Al(NO3)3, NaAlO2, Al(OH)3 and metallic Al) and Na-reactants (NaCl, NaOH, Na3PO4, NaAlO2) in the presence of TPAOH was investigated with regard to the networking of Si and Al atoms in gels andincorporation of Al atoms and their distribution in the hydrothermally synthesized ZSM-5 framework. At Si/Alprod from 12 to 60 the Al?Si?Si?Al sequences (Al pairs) in one 6MR and single Al atoms located in different rings were the most populated (>99% of total Al), reaching 4?70% of the Al atoms in Al pairs in 6MRs adjacent to TPA+. It has been shown that Na+ ions stabilize single SiAlO4 units in Si?Al gels network and lead to a high relative degree of Al incorporation and high population of single Alatoms charge-balanced by TPA+ and Na+ ions. The occurrence of Al pairs in 6MRs is suggested to be controlled by the positive charge on the N atom of TPA+ resulting from its polarization by OH and other anions present. The decreasing polar

Název v anglickém jazyce

Incorporation of Al at ZSM-5 hydrothermal synthesis. Tuning of Al pairs in the framework

Popis výsledku anglicky

The effect of Si- (TEOS, Tixosil and Na-silicate), Al- (AlCl3, Al(NO3)3, NaAlO2, Al(OH)3 and metallic Al) and Na-reactants (NaCl, NaOH, Na3PO4, NaAlO2) in the presence of TPAOH was investigated with regard to the networking of Si and Al atoms in gels andincorporation of Al atoms and their distribution in the hydrothermally synthesized ZSM-5 framework. At Si/Alprod from 12 to 60 the Al?Si?Si?Al sequences (Al pairs) in one 6MR and single Al atoms located in different rings were the most populated (>99% of total Al), reaching 4?70% of the Al atoms in Al pairs in 6MRs adjacent to TPA+. It has been shown that Na+ ions stabilize single SiAlO4 units in Si?Al gels network and lead to a high relative degree of Al incorporation and high population of single Alatoms charge-balanced by TPA+ and Na+ ions. The occurrence of Al pairs in 6MRs is suggested to be controlled by the positive charge on the N atom of TPA+ resulting from its polarization by OH and other anions present. The decreasing polar

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/GAP106%2F11%2F0624" target="_blank" >GAP106/11/0624: Nová kategorie zeolitů s pentasilovou strukturou: Katalytické procesy na zeolitech s řízenou distribucí hliníku ve skeletu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Microporous and Mesoporous Materials

ISSN

1387-1811

e-ISSN

—

Svazek periodika

202

Číslo periodika v rámci svazku

JAN 2015

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

138-146

Kód UT WoS článku

000346211600018

EID výsledku v databázi Scopus

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