摘要
This work examines the effect of butanol as an oxygenated additive to lower carbon monoxide,smoke,nitrogen oxide and hydrocarbon emissions and to improve the performance aspects of Calophyllum inophyllum(Punnai)biodiesel.Singlecylinder,oil-cooled compression ignition engines are employed in this work.Neat Punnai biodiesel(P100)is blended with butanol at 10%and 20%by volume and labelled as B10 P90 and B20 P80,respectively.Methanol and alkaline catalyst(KOH)were used for the transesterification process for biodiesel production.The transesterification technique yielded 88%biodiesel from raw Punnai oil.Engine tests resulted in lower CO,smoke,NO_x and HC emissions when fuelled with both butanol blends when compared to P100.In addition,BSFC(brake-specific fuel consumption)reduced and BTE(brake thermal effciency)increased with the inclusion of butanol blends(B10 and B20)to neat Punnai biodiesel.
