Abstract
In order to clarify the utilization of palm oil methyl ester (PME) as an alternative diesel fuel, the engine performance with PME and the exhaust emissions from PME are investigated using a swirl-chamber diesel engine. Rapeseed oil methyl ester (RME) and gas oil also are tested to compare with PME. The results show that ignition delay of PME is shorter than those of RME and gas oil, that brake thermal efficiency with PME is slightly higher than one with gas oil, and that NOx and Smoke emissions from PME simultaneously are lower than those from gas oil. Moreover, blended fuels of PME with gas oil also are tested to improve the pour point of PME and use PME in lower ambient temperature. As a result, although the pour point of PME is 12.5°C, one of 50 mass percent blended fuel reduce to 0°C. NOx and Smoke emissions of the blended fuels are depended on the mixing ratio.
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