The influence of residue sodium ions in mixed oxide on catalytic activity in transesterification of vegetable oil
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F22%3A39919512" target="_blank" >RIV/00216275:25310/22:39919512 - isvavai.cz</a>
Alternative codes found
RIV/62243136:_____/21:N0000016
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2468823121006337" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2468823121006337</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mcat.2021.112017" target="_blank" >10.1016/j.mcat.2021.112017</a>
Alternative languages
Result language
angličtina
Original language name
The influence of residue sodium ions in mixed oxide on catalytic activity in transesterification of vegetable oil
Original language description
The Mg-Al mixed oxides are an attractive acid-base catalyst with various activity published even for the same reaction under similar conditions. The differences in the results can be caused by impurities remaining after synthesis, which is very often omitted in papers. The influence of remaining sodium impurities (from 5 to 345 mu mol/g of hydrotalcite) on the catalysed transesterification of vegetable oil was studied. The novelty consists in the detailed description of the transformation of sodium species throughout synthesis of mixed oxides: the sodium nitrates, presented in hydrotalcites, were transformed to sodium oxide (during calcination), which reacted with water (present in oil and methanol) to sodium hydroxides. During transesterification, the sodium hydroxide leached to the liquid phase and so increased the ester yield as a homogeneous catalyst. The ester content was only 19 wt.% with the catalyst containing almost no sodium ions (5 mu mol/g), but only 18 mu mol/g caused increasing of ester content to 50 wt.%. Moreover, the sodium compounds rapidly increased the catalyst activity by changing the active sites. The reusability of the catalyst was caried out and the ester content decreased to only 22% after four cycles, because the sodium leached.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA19-00669S" target="_blank" >GA19-00669S: The relations between activity and structure of Mg-Al/Fe mixed oxides including post-treatment for transesterification and Guerbet reaction</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Molecular Catalysis
ISSN
2468-8231
e-ISSN
2468-8231
Volume of the periodical
517
Issue of the periodical within the volume
January
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
"112017-1"-"112017-10"
UT code for WoS article
000737631400010
EID of the result in the Scopus database
2-s2.0-85120444627