Abstract

While biodiesel from jatropha oil is oxidation-sensitive and fluid, palm oil-biodiesel is more stable, but with sub-optimal fluid dynamics. Mixing these oils before reaction could be advantageous for reducing steps in production while generating biodiesel with desired cold-flow and stability properties. Here, we performed central composite designs to optimize the transesterification of jatropha and palm oil mixtures via conventional alkaline (CT) and ultrasound-assisted transesterification (UT), assessing the physicochemical properties of the biodiesel. Acid esterification of oil mixtures was followed by transesterification with NaOH and ethanol. The two-step conversion of jatropha and palm oil binary mixtures was successful. UT resulted in 93%-time reduction (4 min) in comparison to CT (60 min). The increased presence of jatropha oil improved the fluid dynamics of biodiesel. UT is a promising technology for synthesizing biodiesel in less time. The transesterification of binary mixtures is a direct and simple approach for reducing steps in biodiesel production.

摘要

虽然来自麻风树油的生物柴油对氧化敏感且具有流动性，但棕榈油生物柴油更稳定，但流体动力学并不理想。在反应之前混合这些油可能有利于减少生产步骤，同时产生具有所需冷流和稳定性特性的生物柴油。在这里，我们进行了中心复合设计，以通过常规碱 (CT) 和超声辅助酯交换 (UT) 优化麻风树和棕榈油混合物的酯交换，评估生物柴油的物理化学性质。油混合物的酸酯化之后是用NaOH和乙醇进行酯交换。麻风树和棕榈油二元混合物的两步转化是成功的。与 CT（60 分钟）相比，UT 缩短了 93% 的时间（4 分钟）。麻风树油含量的增加改善了生物柴油的流体动力学。UT 是一种很有前途的技术，可以在更短的时间内合成生物柴油。二元混合物的酯交换是减少生物柴油生产步骤的直接且简单的方法。