It was indicated from solubility determineded and phase diagram that biodiesel as fuel additive of mixture of ethanol and diesel is very good ; for biodiesel - gas - ethanol , they were mixed by arbitrary proportion , capability of gas was improved ; as for biodiesel - diesel - methanol , it is not ideal 通過溶解度測定及三相圖實(shí)驗(yàn)數(shù)據(jù)表明生物柴油作為乙醇與柴油添加劑,促溶效果較好;對于生物柴油汽油乙醇體系來講,三者可以任意比例混合,可改善汽油的燃燒性能;對于生物柴油柴油甲醇體系,效果不理想。