ディーゼル燃料としてのメチルエステルの諸特性
-未使用油・廃食油の比較検討
2007 年 42 巻 3 号 p. 455-459
詳細
2007 年 42 巻 3 号 p. 455-459
It is possible that the use of methyl-ester as an alternative to diesel fuel could one day solve the problem of increasing CO2 emissions. Particularly, methyl-ester from waste edible oil (MEW) which recycles the oil resource; however, little is known about the effect oxidation and cracking of MEW do to its combustion characteristics. In this study, methyl-esters from MEW and from unused edible oil (MEU) were compared. MEW and MEU have almost the same properties (density, lower calorific value and kinematic viscosity), but ignition temperature of MEW (276 °C) is lower than that of MEU (289 °C) . During the engine performance test (we used a 273cc diesel engine) we measured the cylinder pressure, exhaust gas emission and fuel consumption. Ignition delay of MEW is shorter than that of MEU, and NOx emission of MEW is lower than that of MEU. Smoke emission for MEW and MEU are almost the same.
