Effect of Additives on Flow Properties of Different Mixture of Petroleum Diesel, Jatropha-Karanja Biodiesel Blends at Low Temperatures

In this article, their cold flow property has been studied with two chemical additives PAO and PMA on petroleum diesel-jatropha biodiesel and petroleum diesel-Karanja biodiesel blends at low temperature. The variation of the cloud point (CP) of diesel-Jatropha biodiesel blends (B0, B5, B10, B15 and B20) passes through minimum with increase in the PMA concentration at a PMA concentration of about 5 g/L. When PAO is used as additive, the variation of the CP of diesel-Jatropha biodiesel blends shows similar trends. However, the minimum occurs at a PAO concentration of about 7.5 g/L for B0, B5, B10, B15 and B20. At a given concentration of PMA/PAO in the range of 0-10 g/L, the CP is the lowest for B0 and highest for B20. The pour point (PP) of diesel-Jatropha biodiesel blends (B0, B5, B10, B15 andB20) decreases monotonically with increase in the concentration of PMA. The lowest values of the PPs of B0, B5, B10, B15 andB20 at a PMA concentration of 10 g/L are -25°C, -22°C, -21°C, -19°C, -17°C, respectively. When PAO is used as additive, the variation of the PP of diesel-Jatropha biodiesel blends shows similar trends. The lowest values of the PPs ofB0, B5, B10, B15 and B20 at a PAO concentration of 10g/L are -29°C, -28°C, -26°C, -25°C, -23°C, respectively. At a given concentration of PMA/PAO in the range of 010 g/L, the PP is the lowest for B0 and highest for B20.