Analysis of decisive structural parameters of zeolites for alkylation of benzene with ethylene

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F20%3A00524178" target="_blank" >RIV/61388955:_____/20:00524178 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0308549" target="_blank" >http://hdl.handle.net/11104/0308549</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2019.117379" target="_blank" >10.1016/j.apcata.2019.117379</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of decisive structural parameters of zeolites for alkylation of benzene with ethylene

Popis výsledku v původním jazyce

The effects of the zeolite structure and the Bronsted and Lewis sites on the activity and selectivity in alkylation of benzene with ethylene to ethylbenzene were investigated using three series of zeolites with different structures, Si/Al ratios and contents of Lewis sites. The 12-membered three-dimensional channels of beta zeolite ((star)BEA) provide higher selectivity to ethylbenzene compared to faujasite zeolite (FAU) with cavities in which the di-alkylated and heavier by-products are formed. The activity is controlled by the concentration of Bronsted acidic sites, while Lewis sites do not contribute to the activity or affect the selectivity. The highest activity and selectivity are obtained using Al-rich H-(star)BEA (Si/Al 4.2) with a high density of Bronsted groups in a well-defined channel structure sterically constrained for heavy by-products. It is shown that a three-dimensional channel structure with Bronsted acid sites in a shape selective environment is a key parameter controlling the activity and selectivity.

Název v anglickém jazyce

Analysis of decisive structural parameters of zeolites for alkylation of benzene with ethylene

Popis výsledku anglicky

The effects of the zeolite structure and the Bronsted and Lewis sites on the activity and selectivity in alkylation of benzene with ethylene to ethylbenzene were investigated using three series of zeolites with different structures, Si/Al ratios and contents of Lewis sites. The 12-membered three-dimensional channels of beta zeolite ((star)BEA) provide higher selectivity to ethylbenzene compared to faujasite zeolite (FAU) with cavities in which the di-alkylated and heavier by-products are formed. The activity is controlled by the concentration of Bronsted acidic sites, while Lewis sites do not contribute to the activity or affect the selectivity. The highest activity and selectivity are obtained using Al-rich H-(star)BEA (Si/Al 4.2) with a high density of Bronsted groups in a well-defined channel structure sterically constrained for heavy by-products. It is shown that a three-dimensional channel structure with Bronsted acid sites in a shape selective environment is a key parameter controlling the activity and selectivity.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis A - General

ISSN

0926-860X

e-ISSN

—

Svazek periodika

591

Číslo periodika v rámci svazku

FEB 2020

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

117379

Kód UT WoS článku

000514023200001

EID výsledku v databázi Scopus

2-s2.0-85076706905