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Publikācija: Optimization of Rapeseed Oil Fatty Acid Esterification with Methanol in the Presence of Sulfuric Acid

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Nosaukums oriģinālvalodā Optimization of Rapeseed Oil Fatty Acid Esterification with Methanol in the Presence of Sulfuric Acid
Pētniecības nozare 1. Dabaszinātnes
Pētniecības apakšnozare 1.4. Ķīmija
Autori Jānis Brinks
Kristaps Māliņš
Valdis Kampars
Jūlija Prilucka
Lauma Apšeniece
Atslēgas vārdi biodiesel; free fatty acids; sulfuric acid; methanol; esterification
Anotācija The interest in biodiesel production from low cost feedstocks is still increasing. Such feedstocks usually contain large amounts of free fatty acids, which make the currently employed base catalysts inefficient, thereby promoting the use of acid catalysts. Due to the high activity and low cost, sulfuric acid could become the most widely used acid catalyst for biodiesel production. Research undertaken so far using sulfuric acid for esterifi cation of fatty acids has shown that the products obtained fail to meet the requirements of the standard EN 14214. This paper describes a systematic study of rapeseed oil fatty acids esterification in order to obtain a product complying with the standard EN 14214. The influence of sulfuric acid concentrations (0.1-3.0%), methanol molar ratios (1:1-20:1) and reaction time (0-360 min) was evaluated. Finally, a two-stage esterification process was developed, where in optimal conditions esterification yield of 97.8% and ester content of 99.6% were achieved.
DOI: 10.2478/pjct-2013-0068
Hipersaite: http://www.degruyter.com/view/j/pjct.2013.15.issue-4/pjct-2013-0068/pjct-2013-0068.xml 
Atsauce Brinks, J., Māliņš, K., Kampars, V., Prilucka, J., Apšeniece, L. Optimization of Rapeseed Oil Fatty Acid Esterification with Methanol in the Presence of Sulfuric Acid. Polish Journal of Chemical Technology, 2013, Vol.15, Iss.4 , 54.-59.lpp. e-ISSN 1899-4741. ISSN 1509-8117. Pieejams: doi:10.2478/pjct-2013-0068
ID 17135