The biodiesel used in this paper is produced by using transesterification reaction between waste oil and methanol to reduce the cost, using NaoH as catalyst , a blending of kerosene and biodiesel were carried out to investigate their properties characterization of the biodiesel blends with kerosene were (density, viscosity, flash point, pour point, cloud point, cetane index). Biodiesel blends with kerosene in proportion at (5:95, 15:85, 25:75, 35:65, 50:50). The results showed, the blending of biodiesel with kerosene enhanced the requirement of this fuel as a substituted of diesel fuel, kerosene can play a role to reduce the flash point and viscosity and reduce the characteristics of cold flow properties of biodiesel and suitable fuel for air blast atomizer burner
