Coconut and Neem Biodiesel as an Alternative to Fossil Diesel for Blending

This work studied the feasibility of blending two biodiesels made from coconut (Cocos nucifera) and neem seed (Azadirachta indica juss) oils without the need for diesel for blending. A comparative study on the physicochemical properties of the blend was done. Oils were transesterified before blending. For neem biodiesel, the values for these parameters were density, 900.3 kg/mm, viscosity, 15.631 mm/s, acid value, 2.198 and % free fatty acid (FFA), 1.099 and 876 kg/mm, 3.0 mm/s, 0.374 and 0.187 respectively for coconut biodiesel. Upon blending the fuel properties were significantly modified and conformed to standard specifications. Fossil diesel was used as a control. The density, flash point, sulphur content, viscosity and cetane number for blend were 897.3 kg/mm, 171°C, 0.1168 °C, 10.56mm/s and 39.6respectively. Blending of coconut-neem biodiesels without using diesel produced desirable fuel properties