Vapor phase acylation of guaiacol with acetic acid over micro, nano and hierarchical MFI and BEA zeolites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10438541" target="_blank" >RIV/00216208:11310/21:10438541 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jxKKW6M5To" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jxKKW6M5To</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcatb.2020.119826" target="_blank" >10.1016/j.apcatb.2020.119826</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Vapor phase acylation of guaiacol with acetic acid over micro, nano and hierarchical MFI and BEA zeolites

Popis výsledku v původním jazyce

Vapor phase acylation of guaiacol with acetic acid was explored over a series of micro, nanocrystalline, and hierarchical MFI and BEA zeolites with different acidic and textural properties using a continuous flow reactor. The main products formed over these zeolites were i) guaiacol acetate, which is produced via O-acylation; ii) Hydroxymethoxyacetophenones (HMAPs), which are of pharmaceutical interest and mainly formed by C-acylation of guaiacol and to lesser extent by Fries rearrangement of guaiacol acetate and iii) catechol, which derives from the demethylation/demethoxylation of guaiacol. Both microcrystalline zeolites activity was poor because of the steric/diffusion limitation. Nanocrystalline and hierarchical MFI zeolites with improved accessibility and optimised acid strength and Lewis/Bronsted acid sites ratio were the most suitable catalysts for the continuous production of HMAPs. Although the guaiacol conversion slightly declines along the time on stream, the HMAPs selectivity and yield are enhanced due to deactivation affecting in higher extent to secondary reactions.

Název v anglickém jazyce

Vapor phase acylation of guaiacol with acetic acid over micro, nano and hierarchical MFI and BEA zeolites

Popis výsledku anglicky

Vapor phase acylation of guaiacol with acetic acid was explored over a series of micro, nanocrystalline, and hierarchical MFI and BEA zeolites with different acidic and textural properties using a continuous flow reactor. The main products formed over these zeolites were i) guaiacol acetate, which is produced via O-acylation; ii) Hydroxymethoxyacetophenones (HMAPs), which are of pharmaceutical interest and mainly formed by C-acylation of guaiacol and to lesser extent by Fries rearrangement of guaiacol acetate and iii) catechol, which derives from the demethylation/demethoxylation of guaiacol. Both microcrystalline zeolites activity was poor because of the steric/diffusion limitation. Nanocrystalline and hierarchical MFI zeolites with improved accessibility and optimised acid strength and Lewis/Bronsted acid sites ratio were the most suitable catalysts for the continuous production of HMAPs. Although the guaiacol conversion slightly declines along the time on stream, the HMAPs selectivity and yield are enhanced due to deactivation affecting in higher extent to secondary reactions.

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

2021

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis B: Environmental

ISSN

0926-3373

e-ISSN

—

Svazek periodika

285

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

119826

Kód UT WoS článku

000623242700007

EID výsledku v databázi Scopus

2-s2.0-85098971782