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10.3390/f14040799
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Article

Quantification of Hydrolytic Sugars from Eucalyptus globulus Bio-Oil Aqueous Solution after Thermochemical Liquefaction

by
Luciana Silva
1,2,
Sofia Orišková
2,
Diogo Gonçalves
2,
Ivo Paulo
2,
José Condeço
2,3,
Miguel Monteiro
2,3,
Nuno M. Xavier
1,
Amélia P. Rauter
1,
João M. Bordado
2,3 and
Rui Galhano dos Santos
2,3,*
1
Centro de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
2
CERENA—Centre for Natural Resources and the Environment, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
3
C5Lab—Sustainable Construction Materials Association, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Forests 2023, 14(4), 799; https://doi.org/10.3390/f14040799
Submission received: 6 March 2023 / Revised: 28 March 2023 / Accepted: 11 April 2023 / Published: 13 April 2023
(This article belongs to the Special Issue Development and Utilization of High-Value Products from Woody Biomass)
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Abstract

Eucalyptus globulus sawdust is a residue from the pulp and paper industry which has been underutilised and undervalued. The thermochemical liquefaction of sawdust can be considered an alternative for recycling this residue, as it results in the production of a bio-oil that, when extracted in water, allows the obtention of an aqueous solution composed of carbohydrates. The sugars resulting from the aqueous fraction of bio-oil can be valued by and applied in the industry to produce sustainable materials. For the first time, the sugar composition of the aqueous extract of bio-oil was disclosed, identified, and quantified by a high-pressure liquid chromatograph (HPLC) coupled to a refractive index (RID) detector containing fructose (36.58%) and glucose (33.33%) as the main components, sucrose (15.14%), trehalose (4.82%) and xylose (10.13%). The presence of these sugars was further confirmed by two-dimensional (2D) 1H-13C heteronuclear single-quantum correlation–nuclear magnetic resonance (HSQC–NMR) spectroscopy. Fourier-transform infrared (FTIR-ATR) and elemental analyses were also used. In addition, the pathway leading to the identified sugars is also suggested.
Keywords: bio-oil; sugars; Eucalyptus globulus; liquefaction; identification bio-oil; sugars; Eucalyptus globulus; liquefaction; identification

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MDPI and ACS Style

Silva, L.; Orišková, S.; Gonçalves, D.; Paulo, I.; Condeço, J.; Monteiro, M.; Xavier, N.M.; Rauter, A.P.; Bordado, J.M.; Galhano dos Santos, R. Quantification of Hydrolytic Sugars from Eucalyptus globulus Bio-Oil Aqueous Solution after Thermochemical Liquefaction. Forests 2023, 14, 799. https://doi.org/10.3390/f14040799

AMA Style

Silva L, Orišková S, Gonçalves D, Paulo I, Condeço J, Monteiro M, Xavier NM, Rauter AP, Bordado JM, Galhano dos Santos R. Quantification of Hydrolytic Sugars from Eucalyptus globulus Bio-Oil Aqueous Solution after Thermochemical Liquefaction. Forests. 2023; 14(4):799. https://doi.org/10.3390/f14040799

Chicago/Turabian Style

Silva, Luciana, Sofia Orišková, Diogo Gonçalves, Ivo Paulo, José Condeço, Miguel Monteiro, Nuno M. Xavier, Amélia P. Rauter, João M. Bordado, and Rui Galhano dos Santos. 2023. "Quantification of Hydrolytic Sugars from Eucalyptus globulus Bio-Oil Aqueous Solution after Thermochemical Liquefaction" Forests 14, no. 4: 799. https://doi.org/10.3390/f14040799

APA Style

Silva, L., Orišková, S., Gonçalves, D., Paulo, I., Condeço, J., Monteiro, M., Xavier, N. M., Rauter, A. P., Bordado, J. M., & Galhano dos Santos, R. (2023). Quantification of Hydrolytic Sugars from Eucalyptus globulus Bio-Oil Aqueous Solution after Thermochemical Liquefaction. Forests, 14(4), 799. https://doi.org/10.3390/f14040799

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