| Summary: | Abstract This experimental investigation evaluates the comparative improvement of palm biodiesel-diesel blend (20 palm biodiesel-80 diesel) with the help of ethanol, n-butanol and diethyl ether as additives regarding emission and performance characteristics. The improved blends consisted 80 diesel, 15 palm biodiesel and 5 additive. Use of additives prominently improved brake power, decreased {BSFC} (brake specific fuel consumption) and increased {BTE} (brake thermal efficiency). Diethyl ether showed highest 6.25 increment of brake power, 3.28 decrement of {BSFC} and about 4 increment of {BTE} than 20 palm biodiesel-diesel blend when used as additive. Other two additives also showed interesting improvement regarding performance. All the blends with additives showed decreased {NO} and {CO} emission but {HC} emission showeda slight increment. However, this experiment reveals comparative suitability of these three additives on improving biodiesel-diesel blend.
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