Effect Of Additives On Flow Properties Of Pure Biodiesels And Their Mixturesat Low

Abstract

The effect of concentration of two chemical additives polymethacrylate (PMA) and polyalphaolefin (PAO) on the cloud point, pour point and kinematic viscosity of Jatropha biodiesel and Karanja biodiesel and their mixture has been studied. The concentration of a chemical additive has been varied in the range of 0 – 10 g/L. For the same concentration 7.5 g/L of chemical additive, the reduction in the cloud point is 4⁰C with PAO compared to 2⁰C with PMA. and  the reduction in pour point is 10–11⁰C with PAO compared to 7–8⁰C with PMA. With increase in concentration of either PMA or PAO from 0 to 10 g/L, the reduction of 20 ¬ 25 percent in kinematic viscosity of pure biodiesels and their mixture has been observed. This study indicates that PAO is superior compared to PMA in improving the flow properties of Jatropha biodiesel and Karanja biodiesel and their mixture at low temperatures.