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

Publication Type Publication (anonimusly reviewed) in a journal with an international editorial board indexed in other databases
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Optimization of Rapeseed Oil Fatty Acid Esterification with Methanol in the Presence of Sulfuric Acid
Field of research 1. Natural sciences
Sub-field of research 1.4 Chemical sciences
Authors Jānis Brinks
Kristaps Māliņš
Valdis Kampars
Jūlija Prilucka
Lauma Apšeniece
Keywords biodiesel; free fatty acids; sulfuric acid; methanol; esterification
Abstract 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
Hyperlink: http://www.degruyter.com/view/j/pjct.2013.15.issue-4/pjct-2013-0068/pjct-2013-0068.xml 
Reference 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 , pp.54-59. e-ISSN 1899-4741. ISSN 1509-8117. Available from: doi:10.2478/pjct-2013-0068
ID 17135