Abstract
Year after year, there are alarming data concerning the excessive release of greenhouse gases into the atmosphere, especially CO2 from the burning of fossil fuels. In this context, the development of renewable energy sources has evolved considerably, mainly due to the incentive use of biofuels, such as bioethanol. The second-generation bioethanol production from lignocellulosic biomasses has interesting potential to meet this energy demand. The Eucalyptus tree stands as a primary example of cultivated hardwoods, owing to its lignocellulosic structure and the biomass residues generated during its processing, where these attributes make it a significant candidate for the production of fuels. The industrial potential of these materials can be explored in the fractionation of their components to reduce their recalcitrance due to the triad formed by cellulose, hemicellulose, and lignin, for further processing and obtaining the products of interest. This paper comprehensively gathers the current technological progress employed for processing Eucalyptus wood biomasses for second-generation bioethanol production. Discussion regarding their chemical composition, the main forms of pretreatments that are being applied, and ways to minimize the generation of fermentative inhibitors during these processes is addressed. Finally, recent researches focused on Eucalyptus biomass-based bioethanol production and techno-economic considerations are discussed. The feasibility of the process is closely tied to the comprehensive utilization of products derived from this biomass. While production appears relatively effective at the laboratory scale, further research is required to develop a cost-effective process that fully harnesses the potential of the biomass.
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Acknowledgements
The authors are grateful for the Human Resources Program of the Brazilian Agency for Petroleum, Natural Gas and Biofuels – PRH/ANP through the Human Resources Training Program for Petroleum and Biofuels Processing (PRH 52.1) as well as CAPES (Coordination for the Improvement of Higher Education Personnel, 001) for scholarships.
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All authors contributed to the paper conception. Conceptualization of the paper was performed by Isabela de L. Valente and João H. C. Wancura. The first draft of the manuscript was written by Isabela de L. Valente, Maicon S. N. dos Santos, and Anderson J. de Freitas. The manuscript was revised and edited by Sabrina F. Lutke and João H. C. Wancura. Sabrina F. Lutke also worked on the data investigation. Fábio A. Mori was responsible by the validation and project administration. All authors read and approved the final manuscript.
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Valente, I.d., Wancura, J.H.C., de Freitas, A.J. et al. Technology Advances in the Bioethanol Production from Eucalyptus Wood Biomass. Bioenerg. Res. 17, 769–789 (2024). https://doi.org/10.1007/s12155-023-10713-4
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DOI: https://doi.org/10.1007/s12155-023-10713-4