Dialysis and column chromatography for biomass pyrolysis liquids separation
2023
Mora, Mireia | Fàbregas, Esteve | Céspedes, Francisco | Rovira, Pere | Puy, Neus
In the current study, a novel approach for separating value-added chemicals from pine wood residues’ pyrolysis liquids (bio-oil) was effectively carried out. It combined two separation techniques used for the first time in this field: dialysis with water, methanol and acetone, and column chromatography with Amberlite™ XAD7 resin. This strategy made it possible to separate bio-oil into four fractions: (1) pyrolytic lignin, which can be utilized in the synthesis of resins, foams, electrodes, asphalt, etc. (2) acid-rich fraction, with particular relevance to the chemical industry, (3) antioxidant fraction, containing phenolic compounds, with a lot of interest for pharmaceutical and nutraceutical industry, and (4) a final fraction containing the most non-polar chemicals from bio-oil. Thus, it was possible to develop a process that allows the obtention of bioproducts from woody biomass, a residue obtained in significant quantities in the management of non-profitable forests, making a step forward within the context of circular economy and bioeconomy.
Show more [+] Less [-]This work was supported by the LIFE Programme of the European Union with the project LIFE BIOREFFORMED [LIFE 19 ENV/ES/ 000544]; and the MINECO [PID2020-117216RB-100]. We would also like to acknowledge the support from the group of Sensors and Biosensors of the Universitat Autonoma ` de Barcelona.
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