Desempenho de um sistema de forno-fornalha para combustão de gases na carbonização de madeira

• Ano de defesa: 2010
• Autor(a) principal: Cardoso, Marco Túlio
• Orientador(a): Carneiro, Angélica de Cássia Oliveira
• Banca de defesa: Silva, José de Castro , Jacovine, Laércio Antonio Gonçalves
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Ciência Florestal
• Departamento: Manejo Florestal; Meio Ambiente e Conservação da Natureza; Silvicultura; Tecnologia e Utilização de
• País: BR
• Palavras-chave em Português: Análise de gases; Crédito de carbono; Carvão de eucalipto; Carvão de café
• Palavras-chave em Inglês: Gas analysis; Carbon credit; Eucalyptus charcoal; Coffee charcoal
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::TECNOLOGIA E UTILIZACAO DE PRODUTOS FLORESTAIS
• Link de acesso: http://locus.ufv.br/handle/123456789/3033

The objective of this research was to evaluate a system oven-furnace for burning gas from wood carbonization to reduce pollutant emissions without loss of coal yield and quality. To adjust the furnace operation a trial was carried out charring wood coffee. It was observed that the gases are burned efficiently at the temperature of 120oC. Later four carbonizations were realized with Eucalyptus sp. Wood. During two carbonizations the gases were oxidize while in two others carbonizations the gases were not burned. Combustion gases were collected for analysis by gas chromatography. The final carbonization temperature ranged from 450 to 500oC after approximately 52 hours. Gravimetric yield and moisture content, bulk density, apparent relative density, friability, gross calorific value, volatiles content, ash and fixed carbon content were determined. It was not observed significant difference for gravimetric yield in coal between the carbonizations with or without the furnace running. However the amount of wood residues was affected. The amount of residues from carbonizations were the gases were burned was smaller. Charcoal physical properties such as moisture content, bulk density, apparent relative density and ash content were not influenced by the use of the furnace. However, it was obtained charcoal higher fixed carbon content and heating value when combustion gases were burned. Gases analysis indicated a reduction from 96.95% to 93.76% of methane and carbon monoxide by the burning the carbonization gases. It is concluded that the furnace combustion of wood carbonization gases is efficient. Less polluting gases are emitted and there is no yield lost in coal production. However, coal chemical properties may be affected by furnace control since the combustion of gases increases the carbonization speed.