低碳醇对食用油下脚料制生物柴油燃料特性的影响

添加低碳醇是解决生物柴油黏度大且低温流动性差等问题的一种有效途径。随着醇类体积比例的增加,混合燃料的密度、十六烷值、运动黏度、凝点、冷滤点、质量低热值降低,氧含量与汽化潜热增加,从而对发动机性能产生直接影响。在动力性降低不超过5%的前提下,醇类体积比例不超过10%,可以明显降低黏度,使燃料流动性增强、雾化质量变好、燃烧完全、排放改善;增加氧含量,有利于提高燃烧速度、促使放热更加集中且燃烧更加完全、排放改善;降低了凝点与冷滤点,提高了低温流动性。

Influence of Low Carbon Alcohol on Fuel Characteristics of Biodiesel Derived from Waste of Edible Oil

Adding low carbon alcohol is an effective way to solve the problem of high viscosity and bad low temperature fluidity of biodiesel. With the increase of alcohol volume ratio, fuel density, cetane number, kinematic viscosity, pour point, cold filter plugging point, and LHV quality decrease, oxygen content and latent heat of vaporization increase, which have a direct impact on the performance of the engine. Under the premise of reducing the power of no more than 5%, the proportion of alcohol volume does not exceed 10%, which can significantly reduce the viscosity, so that the fuel flow is enhanced, the quality of atomization is improved, the combustion is complete, and the emission is improved. Increasing the oxygen content is beneficial to increase the burning rate, make the heat release more concentrated, and the combustion is more complete, and the emission is improved. By reducing the pour point and cold filter plugging point, the low temperature fluidity is improved.