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针对乙醇与柴油互溶性差的特点,采用添加表面活性剂脂肪醇聚氧乙烯醚(AEO3)和助溶剂正戊醇的方法,改变乙醇柴油的微乳化性能。并通过实验考察了它们的最佳复配比,通过乙醇、柴油、稳定剂体系的拟三元相图,考察了温度对其稳定性的影响。最后对乙醇柴油的主要物性进行了测定。通过一系列实验得知,醇类可以作为乙醇柴油混合燃料的助溶剂,正戊醇的助溶效果相对较好;随着温度的降低,乙醇柴油的微乳化液会逐渐变浑浊,最终会分离;乙醇、助溶剂和表面活性剂的加入会降低乙醇柴油的闪点;表面活性剂AEO3作为乳化剂,在醇类稳定剂助溶下(例如AEO3:正戊醇=1:4)制成的乙醇柴油微乳液,稳定时间可达二个月以上。
Aiming at the poor miscibility between ethanol and diesel oil, the microemulsification performance of ethanol diesel was modified by adding the surfactant fatty alcohol polyoxyethylene ether (AEO3) and cosolvent n-amyl alcohol. The best compounding ratio of them was experimentally investigated. The influence of temperature on the stability was investigated by means of quasi-ternary phase diagram of ethanol, diesel and stabilizer system. Finally, the main properties of ethanol-diesel were determined. Through a series of experiments, alcohol can be used as a co-solvent of ethanol-diesel fuel, n-amyl alcohol has a relatively good solubilization effect; as the temperature decreases, the ethanol-diesel microemulsion gradually becomes cloudy and eventually separates ; The addition of ethanol, cosolvent and surfactant reduced the flash point of ethanol-diesel; the surfactant AEO3 was used as emulsifier in the co-dissolution of alcohol stabilizer (eg AEO3: n-pentanol = 1: 4) Ethanol diesel microemulsion, stable time up to two months or more.