Palm biodiesel-ethanol blends could be the better automotive fuel over palm biodiesel alone owing to the high oxygen content and high volatility of ethanol. The evaporation and burning characteristics of palm biodiesel with 10%, 20%, and 30% ethanol by volume concentration respectively, were investigated by using the droplet experiment. Rapid bubble growth and bubble explosions during the heating stage were observed to be substantial for the palm biodiesel droplet added with 30% volume of ethanol (BE30). Adding ethanol in palm biodiesel increased the ignition delay and burn-rate constant by up to 38.6% and 23.2%, respectively whereas, the evaporation duration and burning period decreased by up to 20.6% and 22.5%, respectively. Overall, the relatively shorter evaporation duration and higher burn-rate found for the BE30 droplet could promote high thermal efficiency and has the potential to achieve ultra-low carbon monoxide (CO) and unburned hydrocarbons (UHCs) emissions in diesel and gas turbine engines.

由于乙醇的高氧含量和高挥发性，棕榈生物柴油-乙醇混合物可能是比单独使用棕榈生物柴油更好的汽车燃料。通过液滴实验研究了乙醇体积浓度分别为 10%、20% 和 30% 的棕榈生物柴油的蒸发和燃烧特性。对于添加了 30% 体积乙醇 (BE30) 的棕榈生物柴油液滴，观察到在加热阶段的快速气泡增长和气泡爆炸是显着的。在棕榈生物柴油中添加乙醇使点火延迟和燃烧速率常数分别增加了 38.6% 和 23.2%，而蒸发持续时间和燃烧时间分别减少了 20.6% 和 22.5%。全面的，