Abstract
An experimental investigation has been carried out to study the effect of use of methanol as an additive to the blends of Pongamia pinnata methyl ester and diesel, on the engine performance and exhaust emission characteristics of an unmodified diesel engine. Test fuels were prepared by adding 10% of methanol by volume with different biodiesels – diesel blends denoted by M10B20 (10% methanol+90% B20 blend), M10B40, M10B60, M10B80, and M10B100. The effect of test fuels on brake specific fuel consumption, brake thermal efficiency, exhaust gas temperature, CO, CO2, unburnt hydrocarbons (UBHC), and NOx emissions was investigated. The investigation showed better performance and exhaust emissions except NOx for the test fuels M10B20 and M10B40 as compared with diesel and hence these two could effectively replace diesel for diesel engine application.
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