The long-term catalytic performance of mixed oxides in fixed-bed reactors in transesterification

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F19%3A39914518" target="_blank" >RIV/00216275:25310/19:39914518 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0960148119307566?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0960148119307566?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.renene.2019.05.083" target="_blank" >10.1016/j.renene.2019.05.083</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The long-term catalytic performance of mixed oxides in fixed-bed reactors in transesterification

Popis výsledku v původním jazyce

Mg-Al and Mg-Fe mixed oxides with a constant molar ratio (3:1) were tested in the transesterification of rapeseed oil with methanol in a fixed-bed reactor. The mixed oxides were obtained from parent layered double hydroxides by calcination at 500 degrees C. The synthesized materials were characterized by several experimental techniques such as XRD, TG-MS, TPD-CO2, DRIFT and SEM. The transesterification was carried out at different weight hour space velocities (WHSVs; 1, 2 and 3 h(-1)) and different reaction temperatures (115, 150 and 200&apos;C), with every parameter tested for 32 h. Moreover, the stability of the catalysts was tested by the determination of the metal content in the reaction mixture. The ester yield increases with decreasing WHSV and with increasing reaction temperature. The Mg-Al mixed oxides were more active for all WHSVs and for temperatures of 115 degrees C and 150 degrees C due to the lower crystallite size and particularly higher concentration of basic species. For the reaction temperature of 200&apos;C, the catalyst activity was almost the same for both catalysts. A long-term catalytic test (300 h) for the verification of the catalyst lifetime and stability was also carried out with insignificant leaching of metals. (C) 2019 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

The long-term catalytic performance of mixed oxides in fixed-bed reactors in transesterification

Popis výsledku anglicky

Mg-Al and Mg-Fe mixed oxides with a constant molar ratio (3:1) were tested in the transesterification of rapeseed oil with methanol in a fixed-bed reactor. The mixed oxides were obtained from parent layered double hydroxides by calcination at 500 degrees C. The synthesized materials were characterized by several experimental techniques such as XRD, TG-MS, TPD-CO2, DRIFT and SEM. The transesterification was carried out at different weight hour space velocities (WHSVs; 1, 2 and 3 h(-1)) and different reaction temperatures (115, 150 and 200&apos;C), with every parameter tested for 32 h. Moreover, the stability of the catalysts was tested by the determination of the metal content in the reaction mixture. The ester yield increases with decreasing WHSV and with increasing reaction temperature. The Mg-Al mixed oxides were more active for all WHSVs and for temperatures of 115 degrees C and 150 degrees C due to the lower crystallite size and particularly higher concentration of basic species. For the reaction temperature of 200&apos;C, the catalyst activity was almost the same for both catalysts. A long-term catalytic test (300 h) for the verification of the catalyst lifetime and stability was also carried out with insignificant leaching of metals. (C) 2019 Elsevier Ltd. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/GA19-00669S" target="_blank" >GA19-00669S: Vztahy mezi aktivitou a strukturou Mg-Al/Fe směsných oxidů včetně post-syntetických úprav v transesterifikaci a Guerbetově reakci</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Renewable Energy

ISSN

0960-1481

e-ISSN

—

Svazek periodika

143

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

1259-1267

Kód UT WoS článku

000482686100022

EID výsledku v databázi Scopus

2-s2.0-85067023620