This research was focused on the valorisation of glycerol, exploring the feasibility of an efficient route for oxygenated additives production based on its etherification with bio-butanol. A home-made BEA zeolite sample with a tuneable acidity has been proposed as the catalytic system, being tested in a stirred reactor under different etherification conditions. Although a reaction temperature as high as 200 °C resulted to be beneficial in terms of glycerol conversion (~90%), only by operating at milder conditions the product selectivity to glycerol-ethers can be better controlled, in order to obtain a bio-fuel complying with the requirements for mixing with fossil diesel or biodiesel, without any need of purification from large amount of by-products. A comprehensive identification of all the compounds formed during the reaction was performed by a GC–MS analysis, on the basis of the complex network of consecutive and parallel reaction paths leading not only to the desired ethers, but also to many side products not detected in similar acid-catalyzed reactions in liquid phase and not available in the most used mass-spectra libraries.

这项研究的重点是甘油的增价，探讨了基于生物丁醇醚化的有效途径生产氧化添加剂的可行性。已经提出了具有可调节酸度的自制BEA沸石样品作为催化体系，在不同醚化条件下在搅拌反应器中进行测试。尽管反应温度高达200°C有利于甘油转化率（〜90％），但只有在较温和的条件下操作，才能更好地控制对甘油醚的产物选择性，从而获得生物符合与化石柴油或生物柴油混合的要求的燃料，无需从大量副产物中纯化。