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.

Zeolite-assisted etherification of glycerol with butanol for biodiesel oxygenated additives production

Migliori M.;Giordano G.;
2020

Abstract

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.
Acid catalysts; BEA; Biofuels; Butanol; Butyl glycerol ethers; GC–MS analysis; Glycerol
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/303572
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