近年來被油炸過的可食用廢棄油脂,一般統稱為廢食用油已開始倍受重視,因為廢食用油經過濾後便可被利用製成為生質柴油的料源。由於此種油除了含有一般動、植物油脂所具有的高碘價、酸價和總甘油量等的特性外,又含有一些油炸物的雜質,這些特性和雜質對柴油引擎本體和燃料系統等的機件易產生積污、阻塞和腐蝕等的問題致影響引擎的使用壽命。為了改善這些問題,尚須提高成本將這些生質柴油蒸餾處理後使用。本研究將蒸餾和未蒸餾的廢食用油甲酯生質柴油混合燃料做為實驗用油,經進行引擎性能實驗後,其結果顯示,蒸餾廢食用油甲酯生質柴油混合燃料雖在油耗和各廢氣排放濃度及排放溫度上皆遜於未蒸餾的油,但基於延長柴油引擎的使用壽命,故建議使用蒸餾過的廢食用油甲酯生質柴油混合燃料為宜。
Edible fried oil, generally named waste fried oil, has been paid a very high attention for the source of biodiesel material in recent years. Due to it not only has the fat of animal and vegetable but also includes the characteristics of high iodine value, acid valence, and the amount of glycerin etc. Moreover, engine life time is affected by these characteristics and its impurities which make the parts of diesel engine and fuel system filth heaped, blocked and corroded easily. So increasing cost on distilled waste fried oil methyl ester can be ameliorated problems. The blended fuels of distilled waste fried oil methyl ester(DWOME) and the waste fried oil methyl ester(WOME) are respectively used in this study. After engine performance experiment, the experimental results demonstrated that BSFC, the concentration of each exhaust gas emissions and EGT for DWOME is worse than WOME, but in order to prolong diesel engine life time, using distilled waste fried oil methyl ester is better choice.