【摘要】 利用气相色谱-质谱分析废弃油脂生物柴油(WME)的化学组成,利用低温差示扫描量热仪和冷滤点测试仪研究WME的低温流动性能。采用结晶分离、与-10号柴油(-10PD)调合、添加低温流动性改进剂(Flow Fit、Flow Fit K和T818)降低WME的冷滤点(CFPP)。结果表明:WME主要由14~22个偶数碳原子的脂肪酸甲酯组成,其中饱和脂肪酸甲酯和不饱和脂肪酸甲酯的含量分别为31.04%和64.51%。WME的晶体初析温度和CFPP分别为1.1、3℃;与-10PD调合,B20~B30的CFPP降至-12℃;添加0.1%Flow Fit K,WME、B80、B60、B40、B20、B10和B5的CFPP分别从3、-1、-5、-9、-12、-9℃和-8℃降至-1、-4、-10、-17、-24、-24℃和-26℃。更多还原

【Abstract】 The chemical composition of waste oil biodiesel( WME) was analyzed by GC- MS,and the low- temperature fluidity of WME was studied by low temperature differential scanning calorimetry and cold filter plugging point( CFPP) tester. Three approaches for reducing CFPP of WME were investigated including crystallization fractionation,blending with- 10PD and adding cold flow improvers( Flow Fit, Flow Fit K and T818). The results showed that WME was mainly composed of fatty acid methyl esters with 14- 22 of even number carbon atoms,in which the contents of saturated and unsaturated fatty acid methyl esters were 31. 04% and 64. 51%,respectively. The initial crystallization precipitation temperature and CFPP of WME were 1. 1 ℃ and 3 ℃,respectively. Blending with- 10PD,the CFPP of B20-B30 decreased to- 12 ℃. The CFPPs of WME,B80,B60,B40,B20,B10 and B5 added with 0. 1% of Flow Fit K decreased from 3,- 1,- 5,- 9,- 12,- 9,- 8 ℃ to- 1,- 4,- 10,- 17,- 24,- 24,- 26 ℃,respectively.更多还原