[摘要]：To minimize use of biodiesels synthesized from edible oils, such as palm oil, because of the raising food versus fuel issue, palm biodiesel (PBD) was blended in different weight ratios with biodiesels synthesized from tree-borne non-edible oil seeds, jatropha and pongamia, to examine the effects on the cold filter plugging point (CFPP) of PBD. The CFPP of PBD improved significantly after blending with jatropha biodiesel (JBD) and pongamia biodiesel (PoBD). The dependence of CFPP upon the esters of fatty acid composition was also examined. Good correlations between the CFPP and palmitic acid methyl ester (PAME) were obtained. A correlation between CFPP and total unsaturated fatty acid methyl ester (X) was also determined. Using these two correlations, the CFPP of different biodiesel blends can be determined.
