Adsorption and catalytic study of cyclopentyl methyl ether formation: Structure-activity interplay in medium-pore zeolites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10453435" target="_blank" >RIV/00216208:11310/22:10453435 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IbpwWdzoBP" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IbpwWdzoBP</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apmt.2022.101505" target="_blank" >10.1016/j.apmt.2022.101505</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Adsorption and catalytic study of cyclopentyl methyl ether formation: Structure-activity interplay in medium-pore zeolites

Popis výsledku v původním jazyce

Symmetrical and asymmetrical ethers produced from renewable feedstock play a key role in numerous green chemistry technologies. The aim of our contribution is to understand how textural properties and the location of active sites affect the mechanism of cross-etherification of cyclopentanol with methanol, which yields the asymmetric product cyclopentyl methyl ether. For this purpose, commercial MFI, nanosponge MFI, and nanolayered MFI zeolites with similar concentrations of acid sites, as well as medium-pore TUN and IMF zeolites with internal voids, slightly larger than those of MFI, were investigated by combining catalytic tests with infrared adsorption studies. Detailed FTIR analysis revealed three adsorption adducts, whose fractions varied with the alcohol loading and with the type of zeolite: i) a neutral single H-bonded adduct, ii) a bulky ionic H-bonded adduct, and iii) a neutral cyclopentoxy group. MFI zeolite is the most efficient catalyst in cyclopentanol crossetherification, reaching 70% cyclopentyl methyl ether yield. Both hierarchical (48%-42%) and medium-pore (48%-58%) zeolites exhibited significantly reduced cyclopentyl methyl ether yields due to their larger internal voids and high number of strong Lewis acid sites, which presumably catalyze the undesired reaction of cyclopentanol dehydration to cyclopentene.

Název v anglickém jazyce

Adsorption and catalytic study of cyclopentyl methyl ether formation: Structure-activity interplay in medium-pore zeolites

Popis výsledku anglicky

Symmetrical and asymmetrical ethers produced from renewable feedstock play a key role in numerous green chemistry technologies. The aim of our contribution is to understand how textural properties and the location of active sites affect the mechanism of cross-etherification of cyclopentanol with methanol, which yields the asymmetric product cyclopentyl methyl ether. For this purpose, commercial MFI, nanosponge MFI, and nanolayered MFI zeolites with similar concentrations of acid sites, as well as medium-pore TUN and IMF zeolites with internal voids, slightly larger than those of MFI, were investigated by combining catalytic tests with infrared adsorption studies. Detailed FTIR analysis revealed three adsorption adducts, whose fractions varied with the alcohol loading and with the type of zeolite: i) a neutral single H-bonded adduct, ii) a bulky ionic H-bonded adduct, and iii) a neutral cyclopentoxy group. MFI zeolite is the most efficient catalyst in cyclopentanol crossetherification, reaching 70% cyclopentyl methyl ether yield. Both hierarchical (48%-42%) and medium-pore (48%-58%) zeolites exhibited significantly reduced cyclopentyl methyl ether yields due to their larger internal voids and high number of strong Lewis acid sites, which presumably catalyze the undesired reaction of cyclopentanol dehydration to cyclopentene.

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

2022

Kód důvěrnosti údajů

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

Název periodika

Applied Materials Today [online]

ISSN

2352-9407

e-ISSN

2352-9407

Svazek periodika

28

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

101505

Kód UT WoS článku

000808332500003

EID výsledku v databázi Scopus

2-s2.0-85134023893