餐饮废油生物柴油及其调合燃料的低温流动性的研究

Study on Cold Flow Properties of Waste Cooking Methyl Ester and Its Blending Oils

利用气-质联用仪测定餐饮废油生物柴油(waste cooking methyl ester,WCME)的组成,根据冷滤点试验器和运动黏度试验器测定WCME及其调合燃料的低温流动性,同时利用添加低温流动性改进剂的方法改善WCME及其调合燃料的低温流动性。实验结果表明,WCME主要是由饱和脂肪酸甲酯(27.63 w%)和不饱和脂肪酸甲酯(71.81 w%)组成,冷滤点为0℃,运动黏度(40℃)为4.41 mm2/s。调合燃料中B40冷滤点最低,为-4℃。调合燃料的运动黏度随着WCME的体积比的减少逐渐接近0号柴油的运动黏度。通过添加少于1(v)%的低温流动性改进剂,WCME的冷滤点从0℃降低到-4℃,调合燃料B5、B7、B10、B20和B50的冷滤点降分别从-3℃低至-24、-24、-23、-24和-8℃。

The chemical composition of waste cooking methyl ester （WCME） was analyzed by gas chromatograph-mass spectrometer. The cold flow properties of WCME and its blending with 0PD （WCME/0PD） were studied by the cold filter plugging point tester and the dynamic viscosity tester. Through adding cold flow improver （CFl） and blending, the cold flow property of WCME and WCME/0PD were improved. The study shows that WCME is mainly composed of saturated fatty acid methyl esters （SFAME） and unsaturated fatty acid methyl esters （UFAME）. The mass fraction of SFAME and UFAME are 27.63 % and 71.81%, respectively. The CFPP of WCME is 0 ℃, and the viscosity of WCME is 4.41 mm2/s at 40 ~C. When the ratio of WCME is 40 %, the CFPP of WCME/0PD decreases to -4 ℃. With the decrease of the volume ratio of WCME, the viscosity of WCME/OPD is near the 0PD. By adding less than l（v） % of CFI, the CFPP of WCME decreased from 0℃ to-4 ℃, and the CFPP of WCME/-10PD respectively decreased from-3 ℃ to-24 ℃,-24 ℃,-23 ℃,-24℃ and-8 ℃.