DIFFERENT PLANT BIOMASSES CHARACTERIZATION FOR BIOCHAR PRODUCTION

• Autor(a) principal: Veiga, Tais Regina Lima Abreu
• Data de Publicação: 2018
• Outros Autores: Lima, José Tarcísio, Dessimoni, Anelise Lima de Abreu, Pego, Matheus Felipe Freire, Soares, Jenaina Ribeiro, Trugilho, Paulo Fernando
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Cerne (Online)
• Texto Completo: https://cerne.ufla.br/site/index.php/CERNE/article/view/1585
• topic: Biochar; biomass; carbon immobilization; soil conditioner; charcoal

The use of biomass for biochar production is already a reality. However, little is known about its structure and composition, mainly by the changes occurred during the heat treatment. This information is crucial since it will have an immediate impact on the quality and applicability of the material produced. Therefore, this study aimed to analyze different biomasses, characterizing their potential for biochar production. Woods from Eucalyptus urophylla and Corymbia citriodora and coffee husk were assessed. The biomass was ground and sieved, and then stored under controlled conditions of temperature and humidity. Subsequently, the materials characterization were performed through chemical analysis, elementary, immediate chemistry, thermal gravimetric and infrared vibrational spectroscopy (FTIR). In general, all biomasses presented potential to be used in the production of biochar, where low ratios of H/C and O/C were found. The coffee husk have higher lignin, extractives, ash and fixed carbon, which certainly contributed to its greater thermal stability. The FTIR analysis showed the presence of bands related to recalcitrant chemical groups such as carboxylic and phenolic in the spectra of all biomasses. The profile of the thermograms of wood of C. citriodora and E. urophylla were similar to each other, and different from the coffee husk, which showed higher thermal stability.