Espectroscopia no infravermelho próximo para predizer propriedades da madeira e do carvão de plantio clonal de eucalyptus sp

• Ano de defesa: 2009
• Autor(a) principal: Andrade, Carlos Rogério
• Orientador(a): Trugilho, Paulo Fernando
• Banca de defesa: Lima, José Tarcísio, Raad, Túlio Jardim
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UNIVERSIDADE FEDERAL DE LAVRAS
• Programa de Pós-Graduação: DCF - Programa de Pós-graduação
• País: BRASIL
• Palavras-chave em Português: NIRS; Carvão vegetal; Qualidade; Clone de eucalipto; Charcoal; Quality; Eucalypts clone
• Área do conhecimento CNPq: CNPQ_NÃO_INFORMADO
• Link de acesso: https://repositorio.ufla.br/handle/1/2365

Charcoal produced from the wood of planted forests it is an important source of energy used by the metallurgical sector for the iron ore reduction. To evaluate the quality of this charcoal and wood, that gave it origin, it is fundamental when if think in raw material quality and improvement of the processes. This work was realized with the objective of using the near infrared spectroscopy (NIRS) to get calibrations for the properties of the wood and charcoal of Eucalyptus sp. Two Eucalyptus sp. clones were used of the V&M Florestal Company and used four carbonization final temperatures in the 350ºC, 450ºC, 550ºC and 900ºC. The infrared spectra were directly measured on the solid samples and crushed of the wood and charcoal, in the way of diffuse reflection, being used a Bruker spectrometer in the range from 800 to 1500 nm. The technique NIRS was shown appropriate to esteem the charcoal fixed carbon content with r = 0,98 and RPD = 5,0 for the clone VM01 and with r = 0,96 and RPD = 3,4 for the clone MN463. The modulus of elasticity presented r = 0,91 and RPD = 2,6, using the spectra get in the solid wood, for the parallel compression test. The modulus of rupture and the compression parallel resistance presented correlation of smaller magnitude. The mechanical properties and fixed carbon yield supplied low correlation values. Calibrations for the properties of the charcoal using of wood spectra supplied correlation values of low magnitude, too. The pre-treatments of first and second derivative they supplied the best calibrations for the wood properties. For the charcoal, the use of the original spectra was enough to the get the best correlations. For the solid charcoal, calibrations from the average values of the spectra supplied the best results, while the solid wood and crushed presented similar correlation values for all the properties.