Comparison of three methods for rendering plant fat

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41310%2F13%3A60602" target="_blank" >RIV/60460709:41310/13:60602 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

čeština

Original language name

Comparison of three methods for rendering plant fat

Original language description

Th ree most frequently used methods for fat transesterifi cation were compared using rendering plant fat (RPF) as model. Acid-catalysed transesterifi cation was found to be the most eff ective (conversion 90%) at optimum conditions (fat: methanol ratio 1:10, sulphuric acid amount of 2% v/v, temperature 95°C). Base-catalysed transesterifi cation 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). Th e diff erence 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 transesterifi cation and that free acids are not esterifi ed in alkaline media. Enzyme-(lipase)catalysed reaction could lead to partial esterifi cation of free fatty acids, but with much lower reaction velocity. Th is fact leads to higher conversion in the case of enzyme-catalysed transesterifi cation of RPF compared with base-cata

Czech name

Comparison of three methods for rendering plant fat

Czech description

Th ree most frequently used methods for fat transesterifi cation were compared using rendering plant fat (RPF) as model. Acid-catalysed transesterifi cation was found to be the most eff ective (conversion 90%) at optimum conditions (fat: methanol ratio 1:10, sulphuric acid amount of 2% v/v, temperature 95°C). Base-catalysed transesterifi cation 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). Th e diff erence 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 transesterifi cation and that free acids are not esterifi ed in alkaline media. Enzyme-(lipase)catalysed reaction could lead to partial esterifi cation of free fatty acids, but with much lower reaction velocity. Th is fact leads to higher conversion in the case of enzyme-catalysed transesterifi cation of RPF compared with base-cata

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DM - Solid waste and its control, recycling

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

Name of the periodical

Research in Agricultural Engineering (Zemědělská technika)

ISSN

1212-9151

e-ISSN

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Volume of the periodical

59

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

5

Pages from-to

51-55

UT code for WoS article

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EID of the result in the Scopus database

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