Dialysis and column chromatography for biomass pyrolysis liquids separation.

Waste Manag

Department of Chemistry, Universitat Autònoma de Barcelona (UAB), Edifici Cn, Campus de la UAB, 08193 Cerdanyola del Vallès, Barcelona, Spain; Forest Science and Technology Centre of Catalonia (CTFC). Crta. Sant Llorenç de Morunys, km2, 25280, Solsona, Lleida, Spain.

Published: August 2023

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.

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Source
http://dx.doi.org/10.1016/j.wasman.2023.06.005DOI Listing

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