Fabrícia Gasparini
CEMPEQC - Organic Chemistry Department, Institute of Chemistry, São Paulo State University, Brazil
José Renato de O. Lima
CEMPEQC - Organic Chemistry Department, Institute of Chemistry, São Paulo State University, Brazil
Yussra A. Ghani
CEMPEQC - Organic Chemistry Department, Institute of Chemistry, São Paulo State University, Brazil
Rafael R. Hatanaka
CEMPEQC - Organic Chemistry Department, Institute of Chemistry, São Paulo State University, Brazil
Rodrigo Sequinel
CEMPEQC - Organic Chemistry Department, Institute of Chemistry, São Paulo State University, Brazil
Danilo L. Flumignan
CEMPEQC - Organic Chemistry Department, Institute of Chemistry, São Paulo State University, Brazil \ São Paulo Federal Institute of Education, Science and Technology – IFSP, Brazil
José Eduardo de Oliveira
CEMPEQC - Organic Chemistry Department, Institute of Chemistry, São Paulo State University, Brazil
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http://dx.doi.org/10.3384/ecp11057101Published in: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:14, p. 101-108
Published: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (print), 1650-3740 (online)
EN 14103 is suitable to quantify the ester content in biodiesel free of heptadecanoate ester (C17:0); because it is employed as internal standard (IS). But EN 14103 cannot be applied to the analysis of tallow biodiesel because C17:0 is found in animal fats. This work proposes an improved method; based on EN 14103 capable to determine ester content in tallow biodiesel. Twenty samples from tallow; soybean; babassu and palm biodiesels and its blends were used to carry out the analysis. Chromatograms of ethylic biodiesel were analyzed using separately methylic and ethylic C17:0 (IS). The results showed that some peaks from tallow biodiesel coeluted with both IS peaks; confirming the impossibility to quantify ethylic esters using those standards. Despite this; in all analyzed samples it was observed a constant relationship between two neighbor peaks occurring naturally in the tallow samples. The rate between them was measured and applied as a correction factor to measure the real influence; caused on methylic C17:0 IS by natural C17:0. As a result; the original equation from EN 14103; modified by the introduction of a correction factor (F); resulted in another equation more adequate to analyze the ester content in tallow biodiesel and its blends. Pure tallow biodiesel presented ester content around 4.3% greater; when quantified using the equation containing the correction factor; instead of the original equation.
