Mg-Fe mixed oxides and their rehydrated mixed oxides as catalysts for transesterification

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39912062" target="_blank" >RIV/00216275:25310/17:39912062 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jclepro.2017.05.199" target="_blank" >http://dx.doi.org/10.1016/j.jclepro.2017.05.199</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jclepro.2017.05.199" target="_blank" >10.1016/j.jclepro.2017.05.199</a>

Result language

angličtina

Original language name

Mg-Fe mixed oxides and their rehydrated mixed oxides as catalysts for transesterification

Original language description

The Mg-Fe hydrotalcites with a constant molar ratio (Mg/Fe 2.5:1) were synthesized from two types of precursors (chlorides and nitrates of metals) and thermally pre-treated at different temperatures (500 and 600 degrees C). It was found that the crystallite size of hydrotalcite increases with an increasing aging time. The synthesized materials were tested in the transesterification of rapeseed oil. All synthesized materials were characterized by several techniques such as X-ray Powder Diffraction, thermogravimetric analysis with a mass spectrometer, the determination of specific surface area, pore size distribution and basicity of oxides. It was found that crystallite size, the amount of the crystalline phase and specific surface area were almost the same for both precursors. After calcination, the mixed oxides from the nitrate precursors revealed higher amount of basic sites and population of stronger basic sites than from the chloride precursors. The rehydration, i.e. the restoration of a layered structure, successfully proceeded for hydrotalcite synthesized from nitrates calcined at 500 degrees C. However, in the case of chlorides, the hydrotalcite had to be calcined at 600 degrees C so that the rehydration was successful. The materials synthesized from chlorides have a lower conversion (25%) than material synthesis from nitrates (60%).

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20704 - Energy and fuels

Project

<a href="/en/project/GA15-21817S" target="_blank" >GA15-21817S: Analysis of the structure/activity relationship of Mg/Al, Ca/Al and Zn/Al mixed oxides in aldol condensation and transesterification reactions</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Journal of Cleaner Production

ISSN

0959-6526

e-ISSN

—

Volume of the periodical

161

Issue of the periodical within the volume

September

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

1423-1431

UT code for WoS article

000407655400123

EID of the result in the Scopus database

2-s2.0-85020443755