Chiavone Filho, OsvaldoAlves, Layssa Cristine2026-01-052026-01-052025-09-30ALVES, Layssa Cristine. Equilíbrio líquido-vapor no fracionamento de produtos da pirólise do eucalipto. Orientador: Dr. Osvaldo Chiavone Filho. 2025. 96f. Dissertação (Mestrado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2025.https://repositorio.ufrn.br/handle/123456789/67515Bio-oil, produced via biomass pyrolysis, is a renewable and sustainable alternative to meet the growing global energy demand. Used in biorefineries, it can partially replace petroleum in the production of fuels and chemicals, contributing to the reduction of greenhouse gas emissions. Obtaining it from agricultural and forestry waste promotes the circular economy and energy security, making it essential in the transition to a cleaner energy matrix. To enable its use in separation and refining processes, such as distillation, knowledge of thermodynamic data, especially those related to vapor-liquid equilibrium (VLE), is essential. This data allows for the accurate modeling of the behavior of mixtures present in bio-oil, essential for the design and optimization of industrial operations involving its purification and energy recovery. To obtain information to improve these methods, this study used an Othmer ebulliometer to experimentally measure the vapor-liquid equilibrium (VLE) of the pseudo-binary mixture of eucalyptus bio-oil and ethanol at low pressures. The calibrations performed ensured measurement reliability, reducing experimental uncertainties and ensuring data reproducibility. The ELV results demonstrated the expected thermodynamic behavior for the mixture, with ethanol, the most volatile component, preferentially concentrating in the vapor phase, while the heavier bio-oil compounds remained in the liquid phase. Although ethanol was the major component in the vapor phase, lighter bio-oil compounds were also identified in this phase, confirming fractionation. Correlation with the UNIQUAC and UNIFAC thermodynamic models showed good agreement with the experimental data, validating their application in complex systems. In conclusion, the integration of experimental data and modeling provided reliable parameters for the design of separation processes, in addition to demonstrating the feasibility of energy and chemical recovery of eucalyptus bio-oil in biorefineries.pt-BRAcesso AbertoÓleo de eucaliptoEbuliômetro OthmerEquilíbrio de fasesEtanolBiorrefinariamasterThesisENGENHARIAS::ENGENHARIA QUIMICA