EVALUATION OF BIOFUEL BLENDED WITH PREPARED ETHANOL, N- BUTANOL AND PETROL BASED

Increasing global concern due to air pollution has generated much interest in the environmental friendly alternative fuels. Alternative fuels for internal combustion engines are also becoming important because of diminishing petroleum reserves and increasing air pollution. Developing renewable alternative fuel for IC engine has become an important part of energy policy of governments worldwide, because of scarcity of petroleum and global warming. Among the various alcohols, ethanol is known as the most suited renewable, bio- based and eco-friendly fuel for spark-ignition (SI) engines. The most attractive properties of ethanol as an SI engine fuel are that it can be produced from renewable energy sources such as sugarcane, cassava, corn, barley and many types of waste biomass materials. In addition, ethanol has higher evaporation heat, octane number and flammability temperature therefore it has positive influence on engine performance and reduces exhaust emissions.This present experiment investigated the influence of ethanol and N-butanol addition on the performance, combustion and exhaust emission characteristics of a spark direct injection engine. From the experimental results it is noticed that, at maximum engine speed, about 2.03 % of brake power, 9.90 % of brake thermal efficiency, 2.58 % of cylinder pressure and 2.17 % of heat release rate is increased with E10+B10+P80 fuel blend when compared to pure petrol. However, 10.52 % of BSFC,12.06 % of HC, 15.35 % of CO and 1.87% of NOx emissions decreased with E10+B10+P80 fuel blend when compared to pure petrol at maximum engine speed. On the whole, Ethanol’s physical and chemical properties show that it can be used as an alternative fuel or additive in SI engine. Ethanol-N-butanol- Petrol blends have shown improved performance and emission characteristics. Further both blends also revealed lowered emissions like HC, CO and NOx when compared to pure petrol.