Emission Characteristics of Single Cylinder Diesel Engine Operating on Blends of Neem and Cotton Seed Biodiesel with Diesel

In recent years, much research has been carried to find suitable alternative fuel to petroleum products. In the present investigation experimental work has been carried out to analyze the emissions characteristics of a single cylinder Diesel engine fuelled with the blends of neem and cotton seed biodiesel with diesel at different loads. The crude neem oil and cotton seed oil is purchased and is prepared for experimental work in engine by means of transesterification. The transesterification process for the oils is done by the constant operating parameters such as heating temperature, stirring speed, and methanol. The product output from the transesterification is subjected to the variable load engine operation. The blends such as B10, B20 and B30 is taken and it is operated for the constant speed and variable loading conditions such as 0%, 25%, 50%, 75% and 100%. The emissions measured were carbon monoxide (CO), carbon dioxide CO2), unburnt hydrocarbons (HC) and oxides of nitrogen (NOX). The results of experimental investigation with biodiesel blends with diesel are compared with that of diesel. The results indicated that carbon monoxide and hydrocarbons emissions were found significantly lower when operating on biodiesel-diesel blends, but carbon dioxide and Nitrogen Oxide emissions are found to be higher at full load.