Abstract
Coconut oil has high content of straight chain saturated fatty acids such as lauric acid. Also it contains 14.5 wt% of oxygen, which is about 4 wt% more oxygen than that of rapeseed oil. The purpose of this study is to investigate the utilization of coconut oil methyl ester (CME) as a biodiesel fuel for diesel engines. Therefore, the diesel combustion characteristics and exhaust emissions of CME are investigated by using a small DI diesel engine and comparing with rapeseed oil methyl ester (RME) and gas oil. From the experiment results, CME has the better ignitability and the same thermal efficiency as the other test fuels. Both Smoke and NOx emissions from CME are lower than that from RME and gas oil. Therefore CME can be used as an alternative fuel of petroleum based diesel fuel.
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