小桐子油生物柴油的低温流动性的改进研究

Improvement of low-temperature fluidity of Jatropha curcas.L biodiesel

以小桐子油为原料采用碱催化酯交换法合成生物柴油,测定了其脂肪酸的分布、粘度、凝点和冷滤点等指标.着重研究了分别加入3种降凝剂和0号轻柴油对生物柴油低温流动性的影响,结果表明,降凝剂1、2和3都能改进小桐子油生物柴油的低温流动性,其中,降凝剂1对小桐子生物柴油低温流动性的改进效果最好.降凝剂1、2和3能较好地改善调和油B20的低温流动性.3种降凝剂会不同程度地增加小桐子油生物柴油和调合油B20的运动粘度.

Biodiesel samples were prepared via transesterification of Jatropha curcas.L seed oil.The distribution of fatty acids,viscosity,condensation point and cold contemplation point were determined.The low-temperature fluidity of biodiesel was investigated by adding three cold-flow additives and 0#diesel.It is showed that the low-temperature fluidity of Jatropha curcas.L seed oil biodiesel and B20 could be improved by adding the cold-flow additive 1,2 or 3,especially additive 1.The viscosity of the biodiesel and B20 could be increased by adding of cold-flow additive.