Epoxidation of methyl esters from waste vegetable oil by heterogeneous catalysts WO3/Al2O3

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F24%3AN0000037" target="_blank" >RIV/62243136:_____/24:N0000037 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/24:39922232

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S2468823124007016?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S2468823124007016?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mcat.2024.114519" target="_blank" >10.1016/j.mcat.2024.114519</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Epoxidation of methyl esters from waste vegetable oil by heterogeneous catalysts WO3/Al2O3

Popis výsledku v původním jazyce

The paper describes the catalytic epoxidation of methyl esters of higher fatty acids prepared from waste vegetable oils as a renewable raw material (the second important product is glycerol). Bio-epoxides as "green products" can be used instead of epoxides from crude oil in many applications such as bio-lubricants, biopolymers, polycarbonates, etc. The epoxidation was catalysed by γ-alumina impregnated with tungsten (5–15 wt. %) under different reaction conditions such as the type and amount of solvent (acetonitrile, ethyl acetate and tert‑butanol) and amount of catalysts (0 to 75 wt.% to ester), molar ratio to ester (from 1 to 6) and reaction time (0–24 h). Characterization of tested catalysts was carried out by various analytical methods such as XRF, XRD, Raman spectroscopy, TPD-NH3, N2 physisorption, Hg-porozimetry, SEM-EDX. Moreover, the ternary plot for each solvent was determined to find the homogeneous region since ester and hydrogen peroxide are immiscible liquids. Finally, according to statistical evaluationed, it was found that methyl ester conversion increases with increasing number of W==O bonds.

Název v anglickém jazyce

Epoxidation of methyl esters from waste vegetable oil by heterogeneous catalysts WO3/Al2O3

Popis výsledku anglicky

The paper describes the catalytic epoxidation of methyl esters of higher fatty acids prepared from waste vegetable oils as a renewable raw material (the second important product is glycerol). Bio-epoxides as "green products" can be used instead of epoxides from crude oil in many applications such as bio-lubricants, biopolymers, polycarbonates, etc. The epoxidation was catalysed by γ-alumina impregnated with tungsten (5–15 wt. %) under different reaction conditions such as the type and amount of solvent (acetonitrile, ethyl acetate and tert‑butanol) and amount of catalysts (0 to 75 wt.% to ester), molar ratio to ester (from 1 to 6) and reaction time (0–24 h). Characterization of tested catalysts was carried out by various analytical methods such as XRF, XRD, Raman spectroscopy, TPD-NH3, N2 physisorption, Hg-porozimetry, SEM-EDX. Moreover, the ternary plot for each solvent was determined to find the homogeneous region since ester and hydrogen peroxide are immiscible liquids. Finally, according to statistical evaluationed, it was found that methyl ester conversion increases with increasing number of W==O bonds.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20400 - Chemical engineering

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Molecular Catalysis

ISSN

2468-8231

e-ISSN

—

Svazek periodika

2024

Číslo periodika v rámci svazku

569

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

nestrankovano

Kód UT WoS článku

001309576300001

EID výsledku v databázi Scopus

2-s2.0-85203005539