生物柴油低温流动改进剂复配研究

采用碱催化法制备菜籽油生物柴油和棕榈油生物柴油,对其主要品质指标进行分析;考察了添加不同的柴油低温流动改进剂及其复配物对生物柴油低温流动性能的影响。结果表明,柴油低温流动改进剂能够改善生物柴油低温流动性能;将其进行复配后,能表现出协同效应,取得更好的降滤效果,尤其能使饱和脂肪酸甲酯含量高的棕榈油生物柴油冷滤点降低8℃;不同生物柴油对柴油低温流动改进剂或其复配物感受性存在较大差异,不饱和脂肪酸甲酯含量高,且脂肪酸甲酯种类较多、分布较广的菜籽油生物柴油对单一低温流动改进剂感受性好,而饱和脂肪酸甲酯含量高,且脂肪酸甲酯种类分布较集中的棕榈油生物柴油对复配物感受性好。

Research on matching of cold flow improvers for biodiesel

Two biodiesel samples were prepared from rapeseed oil and palm-oil by alkali catalysis and transesterification and the important characteristics were also determined.The effect of diesel cold flow improvers and their mixtures on biodiesel cold flow property was investigated.The results indicated that diesel cold flow improver could improve the biodiesel cold flow property;the mixture had positive synergic effect on dropping the cold filter plugging point,especially in decreasing the cold filter plugging point of methyl palmitate as much as 8 ℃;there were greater difference on the sensitivity of different biodiesel to the diesel cold flow improvers and their mixtures,the biodiesel with higher content of unsaturated fatty acid methyl ester,more kinds and wider distributions of fatty acid methyl ester had better sensitivity to the single diesel cold flow improver such as rapeseed oil methyl ester,but the biodiesel with higher content of saturated fatty acid methyl ester and centralized distribution had better sensitivity to their mixtures such as palm oil methyl ester.