麻疯树籽油生物柴油与0^#柴油的混配性质

Properties of Jatropha curcas L.oil biodiesel-diesel blends

目前,生物柴油主要用于与石化柴油制成混配物使用。混配物的性质对储运、使用产生重要影响。研究了两种来源的麻疯树籽油与甲醇进行酯交换反应制备得到的生物柴油与0#柴油混配物的密度、硫含量、运动黏度、冷滤点和闪点等性质。结果表明,混配物的密度随生物柴油体积分数增加呈线性增加;硫含量随生物柴油体积分数增加而线性减小;混配物的运动黏度可以根据生物柴油与石化柴油的密度、黏度及体积分数预测;混配物的闪点在生物柴油体积分数小于40%时随着生物柴油体积分数增加缓慢,在大于40%,特别是大于70%以后增加迅速。混配物的冷滤点相对麻疯树籽油生物柴油和0#柴油的冷滤点无明显变化。

At present, biodiesel is mostly used as biodiesel-diesel blends. The properties of blends are important for the storage, transport and usage of blended fuels. The density, sulfur content, kinematic viscosity, cold filter plugging point and flash point of Jatropha curcas L. oil biodiesel -diesel blends were studied. The density of blends was linear with the volume content of biodiesel, and the sulfur content of blends decreased with the increase of biodiesel in a linear relationship. The equation ln（υp）=υ1ln（υ1ρ1） ＋υ2ln（υ2ρ2） was used for predicting kinematic viscosity of the blends. Flash point increased slowly when the content of biodiesel was below 40%, whereas it increased sharply with the increase of biodiesel over 40%, especially over 70%. There was no change in cold filter plugging point of blends as compared to Jatropha curcas L. oil biodiesel and 0^# diesel.