The present experimental investigation focuses on improving the properties of biomixture fuel samples by using a novel additive such as 1-butyl-1-methylpyrrolidinium chloride (ionic liquid). Biomixture fuel samples have been prepared from the waste cooking and soapnut biodiesels after the individual transesterification process of each raw oil. The transesterified biodiesels were blended together through a method of biomixture in various proportions such as SWME-1, SWME-2, SWME-3, SWME-4, and SWME-5 respectively. The compositions of fatty acids for individual prepared biomixture samples were investigated through gas chromatography and mass spectrometry (GC-MS) to identify the characterization of fuel samples. The characteristics of all five biomixture blends were examined and the test results revealed that SWME-4 and SWME-5 considered as optimum blends shows the improved properties and perfectly satisfying the standard limits of BIS, ASTM, and EN testing methods. Five percent of ionic additive added to the optimum blends SWME-4 and SWME-5 denoted as a SWME4BMPyCL5 and SWME5BMPyCL5 are selected for further experimental investigation. It was observed that the overall SFA of the fuel samples increased significantly (from 24% for SWME-1 to 59% for SWME5BMPyCL5) by adding an ionic additive and increasing % of WCME in the SOME fuel blends. Experimental results indicated that saturated fatty acids, oxidation stability, cold flow properties, and cetane number were increased while viscosity, flash point, density, iodine number, free fatty acid, and heating value reduced as compared to biomixture samples and all biodiesel individual fuel samples respectively. Based on experimental investigation results, it has been concluded that the novel approach of ionic additive added to the biomixture samples can improve the properties of fuel.

本实验研究的重点是通过使用新型添加剂（例如1-丁基-1-甲基吡咯烷鎓氯化物（离子液体））改善生物混合物燃料样品的性能。在每种原料油经过单独的酯交换反应后，已从废烹饪油和皂木生物柴油中制备了生物混合物燃料样品。通过生物混合物的方法将酯交换的生物柴油以各种比例混合在一起，例如分别为SWME-1，SWME-2，SWME-3，SWME-4和SWME-5。通过气相色谱和质谱（GC-MS）研究了单个制备的生物混合物样品的脂肪酸组成，以鉴定燃料样品的特性。检查了所有五种生物混合物的特性，测试结果表明，被认为是最佳混合物的SWME-4和SWME-5具有改进的性能，完全满足BIS，ASTM和EN测试方法的标准限制。选择添加到最佳混合物SWME-4和SWME-5（表示为SWME4BMPyCL5和SWME5BMPyCL5）中的离子添加剂的5％，用于进一步的实验研究。观察到，通过在某些混合燃料中添加离子添加剂和增加WCME的百分比，燃料样品的总SFA显着增加（从SWME-1的24％增加到SWME5BMPyCL5的59％）。实验结果表明，饱和脂肪酸，氧化稳定性，冷流性质和十六烷值增加，而粘度，闪点，密度，碘值，游离脂肪酸，与生物混合物样品和所有生物柴油单个燃料样品相比，热值降低了。根据实验研究结果，可以得出结论，将离子添加剂添加到生物混合物样品中的新方法可以改善燃料的性能。