Dept. of Physical Chemistry and Applied Thermodynamics, EPS, Edificio Leonardo da Vinci, Campus de Rabanales, Universidad de Cordoba, Cordoba, Spain.
Bioresour Technol. 2011 Aug;102(15):7280-8. doi: 10.1016/j.biortech.2011.05.005. Epub 2011 May 25.
The effect of fatty acids chain length (LC) and its interaction with unsaturation degree (UD) on important biodiesel quality parameters was studied. Low calorific value, kinematic viscosity, flash point, cetane number and cold filter plugging point of biodiesel blends covering a wide range of fatty acids were analyzed. Analytical results were processed with statistical regression to obtain a prediction model for each property, combining LC and UD. Due to the antagonistic effects of the chemical composition over quality properties, the Derringer desirability function was proposed to allow the most suitable fatty acid composition. This target was achieved considering an average of 1.26 double bounds and 17 carbon atoms. A set of combinations of LC and UD values that provides a biodiesel that fits the European standard EN 14214 was proposed. It was found that a reduction of FAME LC allows a lower UD while keeping biodiesel specifications under the standard limits.
研究了脂肪酸链长（LC）及其与不饱和度（UD）的相互作用对重要生物柴油质量参数的影响。分析了涵盖广泛脂肪酸范围的生物柴油混合物的低热值、运动粘度、闪点、十六烷值和冷滤堵塞点。使用统计回归对分析结果进行处理，获得了每个特性的预测模型，将 LC 和 UD 结合在一起。由于化学成分对质量特性的拮抗作用，提出了 Derringer 理想性函数，以允许最适合的脂肪酸组成。考虑到平均 1.26 个双键和 17 个碳原子，实现了这一目标。提出了一组 LC 和 UD 值的组合，提供了符合欧洲标准 EN 14214 的生物柴油。结果发现，降低 FAME LC 可以在保持生物柴油规格在标准限值内的同时降低 UD。
