Predicting the viscosity of biodiesel fuels from their fatty acid ester composition
Predicting the viscosity of biodiesel fuels from their fatty acid ester composition
复制标题
DOI：
10.1016/s0016-2361(99)00059-9
复制
发表时间：
1999-09-01
期刊：
影响因子：
7.4
通讯作者：
Pegg, MJ
中科院分区：
文献类型：
--
作者：
Allen, CAW;Watts, KC;Pegg, MJ
粘度是影响生物柴油利用率的重要指标之一。本文提出了一种方法，这已被实验验证，用于预测生物柴油的粘度从他们的脂肪酸组成的知识。使用标准脂肪酸酯和天然生物柴油的受控混合物来验证对数混合物方程的适用性。配制了脂肪酸乙酯（FAEE）气相色谱（GC）标准品的几种二元、三元和四元混合物。它们的粘度是从它们的组分值预测的，并且在它们的测量值的+/-3.7%以内。以脂肪酸甲酯（FAME）为标准品，适量混合，模拟了6种典型油脂的脂肪酸组成。预测这些混合物的粘度也在其测量值的+/- 2.1%范围内。以天然油脂为原料制备了5种生物柴油，并应用对数方程预测了其粘度。这些样品的平均预测误差为+/-3%。然后根据文献中公布的脂肪酸组成预测15种生物柴油类型的粘度，发现其变化高达100%。这很可能是某些生物柴油燃料类型性能变化的主要因素。随着不饱和度的增加，生物柴油的粘度显著降低，少量甘油酯的污染显著影响生物柴油的粘度。(C)1999 Elsevier Science Ltd，保留所有权利。
Viscosity is one of the most significant properties to affect the utilization of biodiesel fuels. This paper presents a method, which has been verified experimentally, for predicting the viscosities of biodiesel fuels from the knowledge of their fatty acid composition. The applicability of a logarithmic mixture equation was verified using controlled mixtures of standard fatty acid esters and natural biodiesels. Several binary, ternary and quaternary mixtures of fatty acid ethyl ester (FAEE) gas chromatography (GC) standards were formulated. Their viscosities were predicted from their component values and were within +/- 3.7% of their measured values. The fatty acid compositions of six typical oils were simulated by mixing fatty acid methyl ester (FAME) standards in appropriate amounts. Viscosities of these mixtures were also predicted within +/- 2.1% of their measured values. Five biodiesel types were produced from natural oils and the logarithmic equation was applied to predict their viscosities. An average prediction error of +/- 3% was obtained for these samples. The viscosities of fifteen biodiesel types were then predicted based on their fatty acid composition as published in the literature and were found to vary as much as 100% This is most likely a principal contributing factor to the variation in performance of some biodiesel fuel types. The viscosity of biodiesel fuels reduce considerably with increase in unsaturation, Contamination with small amounts of glycerides significantly affects the viscosity of biodiesel fuels. (C) 1999 Elsevier Science Ltd, All rights reserved.