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Advanced Technologies In Biodiesel by Yun Hin Taufiq-Yap, Aminul Islam

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CHAPTER 4

Methods for Quality Assessment of Biodiesel

Various analytical methods were developed for analyzing mixtures containing fatty acid esters and mono-, di-, and tri-glycerides obtained by the transesterification of vegetable oils. Figure 4.1 shows the transesterification reaction of these triacylglycerides (TAGs) with alcohol to obtain the most common fatty esters contained in biodiesel: palmitic (16:0), stearic (18:0), oleic (18:1, cis-9), linoleic (18:2, cis-9,12), and linolenic (18:3, cis-9,12,15) (Carvalho et al. 2012). The diversity of carbon chains, degree of unsaturation, stereochemistry (cis/trans), and position of double bonds in the carbon chain make biodiesel as a complex mixture that contains a broad spectrum of fatty acid ...

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