Factors affecting oxidation stability of commercially available biodiesel products

Effect of antioxidant on the performance and emission characteristics of a diesel engine fueled with palm biodiesel blends

“…Secondary antioxidants work by impeding the rate of chain initiation by decomposing the hydroperoxides. The free-radical terminators contain a highly labile hydrogen, which is rapidly donated to a peroxyl radical (ROO Å ), which interferes with the lipid-oxidation process [Reactions (1) and (2)] [20]. The term, ''stabilization factor'' is often used to denote the effectiveness of an antioxidant and is expressed as…”

Application of the Multiresponse Optimisation Simplex Method to the Biodiesel - B100 Obtaining Process

“…The binary and ternary mixtures were effective in reducing this parameter, especially when the product was obtained in the presence of soybean oil, thus proving the dependence of CFPP on the properties comprising the esters of biodiesel (KNOTHE, 2005 Employing a single constituent in the production of biodiesel may cause problems in the final product. As soybean oil is more susceptible to oxidation, owing to the abundance of unsaturated fatty in its composition, it has better physicochemical properties at low temperatures, whereas, in beef tallow, predominantly saturated fatty acids occur, giving it greater stability oxidation and lower performance at low temperatures (YANG et al, 2013). Given the distinct characteristics of each raw material, the use of mixture designs becomes critical in optimising the conditions for obtaining B100 biodiesel, because through them we can see the interactions between the components and we can see if there is an optimal formulation in which the desirable characteristics of each individual subject are maintained and the harmful ones are reduced.…”

Assessment of shelf life of Bulgarian industrial FAME by the use of modified ASTM D2274 as accelerated oxidation method

“…Along with its ecology favorable properties, biodiesel can reduce the shortage of diesel production in Europe, to some extent. Unfortunately, this diesel substitute has some drawbacks like poor stability [1][2][3][4][5][6][7][8] and cold flow properties [8][9][10][11], in which these properties are subjected to vigorous research activity recently. Susceptibility of a biodiesel to oxidation is related to [1,12,13]: its chemical composition (configuration of double bounds in unsaturated FAMEs -presence of bis-allylic or allylic methylene groups and their concentration); the presence of synthetic and naturally occurring antioxidants; contact duration with air, heat, and light; interaction with contaminants; construction materials of storage tanks; etc.…”