Performance and emission analysis of a diesel engine burning biodiesel from waste cooking oil

Biodiesel hasavital role in recent years as an alternative fuel for diesel engines. Biodiesel is produced from waste cooking oil by transesterification process. Biodiesel produced from waste cooking oil gives comparable performance and emission characteristics. In this study, a comparative study has been done between blends of biodiesel derived from waste cooking oil and diesel fuels. Diesel-waste cooking oil biodiesel blends of 10 and 20% was prepared. Experimental investigations were tested in a four stroke, single cylinder, diesel engine at a constant speed of 1500 rpm and variable loads. Diesel-biodiesel blends provided significant increase in fuel consumption, specific fuel consumption, exhaust gas temperature, NO_x, CO₂ and oxygen concentrations about diesel fuel. Waste cooking oil biodiesel blends resulted in significant decrease in thermal efficiency, volumetric efficiency, air-fuel ratio, CO and HC emissions about diesel fuel. It is recommended to use wastecooking oil biodiesel up to 20% with diesel fuel without any engine modifications.