The description of catalyst behaviour during transesterification of rapeseed oil - Formation of micellar emulsion

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F20%3A39916417" target="_blank" >RIV/00216275:25310/20:39916417 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0960148120309964?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0960148120309964?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.renene.2020.06.082" target="_blank" >10.1016/j.renene.2020.06.082</a>

Result language
angličtina
Original language name
The description of catalyst behaviour during transesterification of rapeseed oil - Formation of micellar emulsion
Original language description
The catalyst behaviour throughout transesterification catalysed by KOH was described. The unreacted catalyst was determined: its amount depends on the initial catalyst amount and the maximum (almost 60 wt%) was reached for usually used catalyst amount (0.8 wt% to oil). Although the reaction mixture contains quite high amount of ions (OH-, CH3O- and K+) formed from catalyst, the measured in-situ conductivity during transesterification was very low (about 2 mu S cm(-1)). The reason was the formation of micellar emulsion from soaps formed by side reaction, because their concentration exceeded the critical micellar concentration. The formation of emulsion was confirmed by determination of the particles size. The formed emulsion are the cause that significant part of the catalyst remains unreacted and has to be neutralised at the end of the reaction, which increases the production cost and so whole production is less environmental. It was found out that the micellar emulsion was destroyed by addition of methanol to the reaction mixture. (c) 2020 Elsevier Ltd. All rights reserved. Superscript/Subscript Available
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - 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/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)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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