Santos, Cynthia Patricia de Sousa creator Santos, Rosimeire Cavalcante dos creator Carneiro, Angélica de Cássia Oliveira creator Castro, Ana Flávia Neves Mendes creator Castro, Renato Vinícius Oliveira creator Costa, Sarah Esther de Lima creator Gomes, Izabelle Rodrigues Ferreira creator Mairinck, Krisnara Soares creator text periodical abstract or summary bl. continuing eng Abstract Our study aims to determine the energetic quality of residues from the manufacturing of jatropha and eucalyptus, as well as to evaluate the physical properties of the briquettes made with different proportions of these biomasses. The following proportions were used for this study: 100% eucalyptus; 75% eucalyptus; 50% jatropha and 50% eucalyptus; 75% jatropha; and 100% jatropha. The apparent density of the residues, the immediate chemical product, the highest calorific value (HCV), the apparent density, the energy density, the usable calorific value (UCV), the lowest calorific value (LCV), the breaking strength of the briquettes (FR) and the hydroscopic moisture balance (HMB) were verified. Although the energetic characteristics of the jatropha residues are not superior to those of eucalyptus, this biomass adds favorable mechanical characteristics to the briquettes comprised of greater proportions of jatropha to eucalyptus, guaranteeing the energetic properties of the briquette, as well as reducing the production cost. Keywords: combustible solid, biomass energy, manufacturing briquettes. Publicação on-line; 30 ref.; 3 tables; Summary (En) COMBUSTÍVEL ENERGIA BIOMASSA BRIQUETE Rio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994 2025-0456 1415-0980 / ISSN 2179-8087 0nline BR2026001247 v. 27(2) p. 1-5; (2020) https://www.scielo.br/j/floram/a/49CpQmtJ8vgmhkzfZJVmbgS/?format=pdf&lang=en https://www.scielo.br/j/floram/a/49CpQmtJ8vgmhkzfZJVmbgS/?format=pdf&lang=en BR-BrBNA 260520 20260520174048.0 eng