Swelling of MCM-56 and MCM-22P with a new medium - surfactant-tetramethylammonium hydroxide mixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F13%3A00422067" target="_blank" >RIV/61388955:_____/13:00422067 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.cattod.2012.07.040" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2012.07.040</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2012.07.040" target="_blank" >10.1016/j.cattod.2012.07.040</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Swelling of MCM-56 and MCM-22P with a new medium - surfactant-tetramethylammonium hydroxide mixtures

Popis výsledku v původním jazyce

Two different types of layered MWW zeolite, i.e., delaminated MCM-56 and multilayer MCM-22P, have been studied for swelling using a new surfactant/tetraalkylammonium combination as the swelling reagent. The commonly used in the past tetrapropylammonium hydroxide (TPA-OH) was replaced by its tetramethylammonium (TMA-OH) homologue. The latter was previously considered unsuitable for use in swelling of MCM-22P. The extent of swelling with different amounts of TMA-OH accompanying surfactant was determined first by X-ray diffraction. Selected samples were pillared with silica and evaluated quantitatively by nitrogen sorption at 77 K and FTIR. The swelling of MCM-56, which is reported in detail for the first time, has been found to be more facile and extensive compared to the multi-layer MCM-22P, consistent with its delaminated nature. BET surface areas of pillared MCM-56 samples increase with the amount of hydroxide used for swelling and approach 700 m(2)/g. Pillared MCM-22P show similar tr

Název v anglickém jazyce

Swelling of MCM-56 and MCM-22P with a new medium - surfactant-tetramethylammonium hydroxide mixtures

Popis výsledku anglicky

Two different types of layered MWW zeolite, i.e., delaminated MCM-56 and multilayer MCM-22P, have been studied for swelling using a new surfactant/tetraalkylammonium combination as the swelling reagent. The commonly used in the past tetrapropylammonium hydroxide (TPA-OH) was replaced by its tetramethylammonium (TMA-OH) homologue. The latter was previously considered unsuitable for use in swelling of MCM-22P. The extent of swelling with different amounts of TMA-OH accompanying surfactant was determined first by X-ray diffraction. Selected samples were pillared with silica and evaluated quantitatively by nitrogen sorption at 77 K and FTIR. The swelling of MCM-56, which is reported in detail for the first time, has been found to be more facile and extensive compared to the multi-layer MCM-22P, consistent with its delaminated nature. BET surface areas of pillared MCM-56 samples increase with the amount of hydroxide used for swelling and approach 700 m(2)/g. Pillared MCM-22P show similar tr

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

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

204

Číslo periodika v rámci svazku

APR 2013

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

8-14

Kód UT WoS článku

000314825900003

EID výsledku v databázi Scopus

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