Thermochemical Processes Research Group (GPT), Aragón Institute of Engineering Research (I3A), Universidad de Zaragoza Zaragoza, Spain ; Chemical and Environmental Engineering Department, Universidad de Zaragoza Zaragoza, Spain.
Thermochemical Processes Research Group (GPT), Aragón Institute of Engineering Research (I3A), Universidad de Zaragoza Zaragoza, Spain.
Front Chem. 2014 Jul 22;2:43. doi: 10.3389/fchem.2014.00043. eCollection 2014.
IN THE PRESENT WORK, SEVERAL FATTY ACID METHYL ESTERS (FAME) HAVE BEEN SYNTHESIZED FROM VARIOUS FATTY ACID FEEDSTOCKS: used frying olive oil, pork fat, soybean, rapeseed, sunflower, and coconut. The oxidation stabilities of the biodiesel samples and of several blends have been measured simultaneously by both the Rancimat method, accepted by EN14112 standard, and the PetroOXY method, prEN16091 standard, with the aim of finding a correlation between both methodologies. Other biodiesel properties such as composition, cold filter plugging point (CFPP), flash point (FP), and kinematic viscosity have also been analyzed using standard methods in order to further characterize the biodiesel produced. In addition, the effect on the biodiesel properties of using 4-allyl-2,6-dimethoxyphenol and catechol as additives in biodiesel blends with rapeseed and with soybean has also been analyzed. The use of both antioxidants results in a considerable improvement in the oxidation stability of both types of biodiesel, especially using catechol. Adding catechol loads as low as 0.05% (m/m) in blends with soybean biodiesel and as low as 0.10% (m/m) in blends with rapeseed biodiesel is sufficient for the oxidation stabilities to comply with the restrictions established by the European EN14214 standard. An empirical linear equation is proposed to correlate the oxidation stability by the two methods, PetroOXY and Rancimat. It has been found that the presence of either catechol or 4-allyl-2,6-dimethoxyphenol as additives affects the correlation observed.
在本工作中，我们从各种脂肪酸原料（废食用油、猪油、大豆、油菜籽、葵花籽和椰子）合成了几种脂肪酸甲酯（FAME）。采用 EN14112 标准认可的 Rancimat 法和 prEN16091 标准的 PetroOXY 法，同时测定了生物柴油样品及其几种混合物的氧化稳定性，旨在寻找这两种方法之间的相关性。还使用标准方法分析了其他生物柴油特性，如成分、冷滤堵塞点（CFPP）、闪点（FP）和运动粘度，以进一步表征所生产的生物柴油。此外，还分析了在油菜籽和大豆生物柴油混合物中添加 4-烯丙基-2,6-二甲氧基苯酚和儿茶酚作为添加剂对生物柴油性能的影响。这两种抗氧化剂的使用都显著提高了两种生物柴油的氧化稳定性，特别是使用儿茶酚。在大豆生物柴油混合物中添加低至 0.05%（m/m）的儿茶酚负载量，在油菜籽生物柴油混合物中添加低至 0.10%（m/m）的儿茶酚负载量，就足以使氧化稳定性符合欧洲 EN14214 标准规定的限制。提出了一个经验线性方程来关联 PetroOXY 和 Rancimat 两种方法的氧化稳定性。结果发现，添加儿茶酚或 4-烯丙基-2,6-二甲氧基苯酚作为添加剂会影响观察到的相关性。
