Comparison of three methods for rendering plant fat transesterification

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027022%3A_____%2F13%3A00000410" target="_blank" >RIV/00027022:_____/13:00000410 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Comparison of three methods for rendering plant fat transesterification
Original language description
Three most frequently used methods for fat transesterification were compared using rendering plant fat (RPF) as model. Acid-catalyzed transesterification was found to be the most effective (conversion 90%) at optimum conditions (fat: methanol ratio 1:10,sulfuric acid amount of 2% v/v, temperature 95°C). Base-catalyzed transesterification of RPF on the other hand, results in much lower conversion (45%) at optimum conditions (fat:methanol ratio 1:20, NaOH amount 8% w/v, optimum temperature 95°C). The difference is done (among others) by the fact that RPF has high concentration of free acid (high acidity number) compared with the fats usually used for transesterification and that free acids are not esterified in alkaline media. Enzyme (lipase) catalyzedreaction could lead to partial esterification of free fatty acids, but with much lower reaction velocity. This fact leads to higher conversion in the case of enzyme-catalyzed transesterification of RPF compared with base-catalyzed reactio
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JT - Propulsion, engines and fuels
OECD FORD branch
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Project
<a href="/en/project/QG60079" target="_blank" >QG60079: Study of the methods for production of biofuel from animal fat.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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