Abstract
Biodiesel, an alternative fuel is derived from the fats of animals and plants. As energy demands increase and fossil fuels are limited, research is directed towards alternative renewable fuels. The main advantages of using this alternative fuel are its renewability, biodegradability and better quality of exhaust gases. It is technically competitive and environmentally friendly alternative to conventional petro-diesel fuel for use in Compression Ignition (CI) engines. The use of biodiesel reduces the dependence on imported fossil fuels which continue to decrease in availability and affordability. An experimental investigation has been carried out to evaluate the combustion, performance and emission characteristics of a diesel engine with the effect of using neem oil methyl ester and its diesel blends at different loads. The results showed that maximum cylinder pressure and maximum rate of heat release increased with the increase in bio diesel blends. The carbon monoxide (CO) and smoke emissions were found significantly lower when operating on biodiesel-diesel blends, but Nitrogen Oxide (NOx) emissions are found to be higher at full load.
Highlights
Better than diesel such as higher cetane number, no aromatics, almost no sulfur and more than 10% oxygen
The results showed that maximum cylinder pressure and maximum rate of heat release increased with the increase in bio diesel blends
The carbon monoxide (CO) and smoke emissions were found significantly lower when operating on biodieseldiesel blends, but Nitrogen Oxide (NOx) emissions are found to be higher at full load
Summary
Better than diesel such as higher cetane number, no aromatics, almost no sulfur and more than 10% oxygen. Sahoo and Das (2009) have conducted the experiment with methyl esters of Honge (HOME), Jatropha (JOME) and Sesame (SOME) in a single cylinder, four stroke, direct injection Compression Ignition (CI) engine and reported that the higher emission of CO, HC and smoke and lower NO as compared to that of diesel. In this experimental study, the biodiesel from different non-edible oils was produced by a method of alkaline-catalyzed transesterification. The objectives of this experimental study are to assess the performance, combustion and emission characteristics of a diesel engine with Neem oil methyl ester diesel blends and compared with diesel fuel
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