Does hierarchical structure affect the shape selectivity of zeolites? Example of transformation of n-hexane in hydroisomerization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F18%3A00490606" target="_blank" >RIV/61388955:_____/18:00490606 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/18:00490606

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jcat.2018.05.010" target="_blank" >http://dx.doi.org/10.1016/j.jcat.2018.05.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcat.2018.05.010" target="_blank" >10.1016/j.jcat.2018.05.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Does hierarchical structure affect the shape selectivity of zeolites? Example of transformation of n-hexane in hydroisomerization

Popis výsledku v původním jazyce

The large mesoporous surfaces of hierarchical zeolites without confinement of the active sites leads to the question of whether the shape selectivity of these zeolites is essentially altered. The hydroisomerization of n-hexane to mono- and dibranched C6isomers was carried out as a model reaction governed by the shape selectivity to obtain insight into the effects of the secondary mesoporous structure. A series of micro- and micromesoporous ZSM-5, MOR,∗BEA, and Y zeolites with regular microporosity or well-developed mesoporosity were prepared by synthesis and postsynthesis treatment, and their selectivity was investigated. We demonstrate that isomerization is exclusively controlled by concurrent interaction of the reactant with the Brønsted site and the inner walls of the zeolite channels, irrespective of the mesoporosity. The reaction is facilitated only by a combination of dispersive forces in the inert void and acid sites in the confined environment. The shape selectivity of micromesoporous zeolites is thus fully preserved.

Název v anglickém jazyce

Does hierarchical structure affect the shape selectivity of zeolites? Example of transformation of n-hexane in hydroisomerization

Popis výsledku anglicky

The large mesoporous surfaces of hierarchical zeolites without confinement of the active sites leads to the question of whether the shape selectivity of these zeolites is essentially altered. The hydroisomerization of n-hexane to mono- and dibranched C6isomers was carried out as a model reaction governed by the shape selectivity to obtain insight into the effects of the secondary mesoporous structure. A series of micro- and micromesoporous ZSM-5, MOR,∗BEA, and Y zeolites with regular microporosity or well-developed mesoporosity were prepared by synthesis and postsynthesis treatment, and their selectivity was investigated. We demonstrate that isomerization is exclusively controlled by concurrent interaction of the reactant with the Brønsted site and the inner walls of the zeolite channels, irrespective of the mesoporosity. The reaction is facilitated only by a combination of dispersive forces in the inert void and acid sites in the confined environment. The shape selectivity of micromesoporous zeolites is thus fully preserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Catalysis

ISSN

0021-9517

e-ISSN

—

Svazek periodika

364

Číslo periodika v rámci svazku

AUG 2018

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

262-270

Kód UT WoS článku

000440391600025

EID výsledku v databázi Scopus

2-s2.0-85048449211