Long storage stability of biodiesel from vegetable and used frying oils
Long storage stability of biodiesel from vegetable and used frying oils
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DOI：
10.1016/j.fuel.2007.02.014
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发表时间：
2007-11-01
期刊：
影响因子：
7.4
通讯作者：
Aracil, Jose
中科院分区：
文献类型：
--
作者：
Bouaid, Abderrahim;Martinez, Mercedes;Aracil, Jose
生物柴油被定义为植物油的单烷基酯。近年来，生物柴油的生产在欧盟有了巨大的增长。虽然生物柴油的商业前景也有所增长，但其在储存期间的抗氧化降解性仍存在一些问题。由于生物柴油的化学结构，分子中双键的存在与氧气产生高水平的反应性，特别是当它与空气接触时。因此，长时间储存的生物柴油可能会导致降解的燃料特性，可以损害燃料quality.本研究使用的样品制备的生物柴油的酯交换反应的过程中，从不同的植物油：高油酸向日葵油（HOSO），高和低芥酸埃塞俄比亚芥油（HEBO和乐博）分别和使用煎炸油（UFO）。这些生物柴油，从不同的来源，用于确定长期储存在不同条件下的氧化稳定性的影响。样品在室温下储存在白色（暴露）和琥珀色（未暴露）玻璃容器中，研究为期30个月。定期取样测定以下理化质量参数：酸值（AV）、过氧化值（PV）、粘度（v）、碘值（IV）和不溶性杂质（II）。结果表明，随着生物柴油样品储存时间的增加，AV，PV，v和II增加，而IV降低。然而，在12个月的储存时间之前，暴露于日光和不暴露于日光的生物柴油样品之间存在轻微差异。但在这一时期之后，差异就显着了。(C)2007爱思唯尔有限公司版权所有。
Biodiesel is defined as the mono-alkyl esters of vegetable oils. Production of biodiesel has grown tremendously in European Union in the last years. Though the commercial prospects for biodiesel have also grown, there remains some concern with respect to its resistance to oxidative degradation during storage. Due to the chemical structure of biodiesel the presence of the double bond in the molecule produce a high level of reactivity with the oxygen, especially when it placed in contact with air. Consequently, storage of biodiesel over extended periods may lead to degradation of fuel properties that can compromise fuel quality.This study used samples of biodiesel prepared by the process of transesterification from different vegetable oils: high oleic sunflower oil (HOSO), high and low erucic Brassica carinata oil (HEBO and LEBO) respectively and used frying oil (UFO). These biodiesels, produced from different sources, were used to determine the effects of long storage under different conditions on oxidation stability. Samples were stored in white (exposed) and amber (not exposed) glass containers at room temperature.The study was conducted for a period of 30-months. At regular intervals, samples were taken to measure the following physicochemical quality parameters: acid value (AV), peroxide value (PV), viscosity (v), iodine value (IV) and insoluble impurities (II). Results showed that AV, PV, v and II increased, while IV decreased with increasing storage time of biodiesel samples. However, slight differences were found between biodiesel samples exposed and not exposed to daylight before a storage time of 12 months. But after this period the differences were significant. (C) 2007 Elsevier Ltd. All rights reserved.