DOI: 10.5176/2251-189X_SEES22
Authors: Sathish Kumar R., Suresh Kumar K. and Velraj R.
Abstract:
The use of biodiesel as an alternative fuel for unmodified diesel engine is gaining increased attention due to the global twin problems of fossil fuel depletion and environmental degradation. However, high viscosity and lower calorific value restrict the use in pure form and often blended with diesel. 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 (PPME) and diesel, on the engine performance and exhaust emission characteristics of an unmodified diesel engine. Five different blends namely B20 (20{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} biodiesel and 80{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} diesel by volume), B40, B60, B80 and B100 (100{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} biodiesel) were considered for methanol addition. Test fuels were prepared by adding 10{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} of methanol by volume with different biodiesel - diesel blends denoted by M10B20 (10{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} methanol + 90{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} B20 blend), M10B40, M10B60, M10B80 and M10B100. The effect of test fuels on brake specific fuel consumption (BSFC), brake thermal efficiency, exhaust gas temperature and CO, CO2, UBHC, and NOx emissions was investigated. The experimental investigation showed that the performance of the test fuels M10B20 and M10B40, in comparison with neat diesel, was found to be better than and at par, respectively. The various emissions except NOx for M10B20 and M10B40 were found to be better than neat diesel and hence these two could effectively replace diesel for diesel engine application.
Keywords: Pongamia Pinnata Methyl Ester (PPME), Methanol, Additive, Biodiesel-Diesel-Methanol Blend
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