Effect of phase separation temperature on ester yields from ethanolysis of rapeseed oil in the presence of NaOH and KOH as catalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F12%3A39895250" target="_blank" >RIV/00216275:25310/12:39895250 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.biortech.2012.01.143" target="_blank" >http://dx.doi.org/10.1016/j.biortech.2012.01.143</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.biortech.2012.01.143" target="_blank" >10.1016/j.biortech.2012.01.143</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of phase separation temperature on ester yields from ethanolysis of rapeseed oil in the presence of NaOH and KOH as catalysts

Popis výsledku v původním jazyce

The effects of phase separation temperatures (5-90 degrees C) on losses of higher fatty acid (C-16 and C-18) ethyl esters in the glycerol phase were investigated. Losses of ethyl esters produced from ethanolysis of rapeseed oil were 30-60% higher when NaOH rather than KOH was used as homogeneous catalyst. The losses decreased with an increase in separation temperature, resulting in an increase in the yield of the ester phase. The concentration of impurities (e.g. alkali metals, free glycerol and glycerides) in the ester phase increased with increasing separation temperature due reversible transesterification and reciprocal solubility of the compounds. Carbonates formed during neutralization of the catalysts are also transesterification catalysts and they cause reverse reaction. The ethyl ester bound in the glycerol phase during NaOH-mediated catalysis can be extracted by heating the separated glycerol phase to 60-90 degrees C. The ester yield is increasing with increasing separation te

Název v anglickém jazyce

Effect of phase separation temperature on ester yields from ethanolysis of rapeseed oil in the presence of NaOH and KOH as catalysts

Popis výsledku anglicky

The effects of phase separation temperatures (5-90 degrees C) on losses of higher fatty acid (C-16 and C-18) ethyl esters in the glycerol phase were investigated. Losses of ethyl esters produced from ethanolysis of rapeseed oil were 30-60% higher when NaOH rather than KOH was used as homogeneous catalyst. The losses decreased with an increase in separation temperature, resulting in an increase in the yield of the ester phase. The concentration of impurities (e.g. alkali metals, free glycerol and glycerides) in the ester phase increased with increasing separation temperature due reversible transesterification and reciprocal solubility of the compounds. Carbonates formed during neutralization of the catalysts are also transesterification catalysts and they cause reverse reaction. The ethyl ester bound in the glycerol phase during NaOH-mediated catalysis can be extracted by heating the separated glycerol phase to 60-90 degrees C. The ester yield is increasing with increasing separation te

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP106%2F11%2F0773" target="_blank" >GAP106/11/0773: Analýza vztahu struktury a aktivity acido-bazických katalyzátorů v esterifikačních a transesterifikačních reakcích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Bioresource Technology

ISSN

0960-8524

e-ISSN

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Svazek periodika

110

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

288-291

Kód UT WoS článku

000305852700041

EID výsledku v databázi Scopus

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