The objective of this study was to study the cold flow properties of JCB (Jatropha curcas biodiesel) and
WCB (Waste cooking oil biodiesel). For the purpose two methods were examined experimentally viz.
winterization and blending of biodiesel samples with petro diesel and kerosene. Winterization was
found to be effective as it improved the cold flow properties of biodiesel samples but at the same time
decreased the yield and stability due to partially removal of saturated fatty acids. Blending was found to
be more favorable for improvement in cold flow properties of biodiesel without any effect on yield,
however, the biodiesel become more stable after blending. The CP and PP (pour point) for JCB for B20
blends with petro diesel were reported as 14.9 C and 14 C respectively, however, for WCB it was 12 C
and 11.5 C respectively. Kerosene K20 samples was showing best result as the reported CP and PP
were 1 C and 2.2 C respectively for JCB. However in case of WCB blends with kerosene, the reported
CP and PP for K20 blends are 10.5 C and 12 C respectively.