INFLUÊNCIA DA TEMPERATURA FINAL DE CARBONIZAÇÃO NAS CARACTERÍSTICAS FÍSICAS E QUÍMICAS DO CARVÃO VEGETAL DE JATOBÁ (Himenea courbaril L.)

Trugilho, Paulo Fernando; Silva, Dimas Agostinho da

doi:10.5380/rsa.v2i1.976

Cited by 41 publications

(63 citation statements)

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“…These authors observed a higher degradation of wood constituents at the highest temperatures, which leads to a reduction in volatile materials. Trugilho and Silva (2001) also obtained a reduction in the contents of volatile materials with increasing temperatures.…”

Section: Gravimetric Yield and Immediate Chemical Analysismentioning

confidence: 83%

“…The adjustment of simple regression models showed high coeffi cients of determination and tended to reduce charcoal yield with increasing carbonization temperatures (Figure 1). The reduction in yield at high temperatures is due to the continuation of the release of volatile material from charcoal mass (TRUGILHO; SILVA, 2001;VIEIRA et al, 2013).…”

Section: Gravimetric Yield and Immediate Chemical Analysismentioning

confidence: 99%

“…Wood species and final carbonization temperature are important variables that influence the quality of charcoal, since different products with different physical and chemical characteristics are generated as a function of the different reactions caused by these two variables (TRUGILHO; SILVA, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Extractives and Carbonization Temperature on Energy Characteristics of Wood Waste in Amazon Rainforest

Moulin

Nobre

Castro

et al. 2017

CERNE

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ABSTRACT:The objective of this study was to evaluate the effect of extractives soluble in hot water, besides final carbonization temperatures, on the gravimetric yield and properties of charcoal for waste of three native forest species from the Amazon region. Waste cuttings of Ipé, Grapia and Maçaranduba species, from the machine processing for joinery of a company in the State of Pará, were used. Carbonization was carried out in an adapted electric furnace with a heating rate of 1.67°C min -1 and final temperatures of 500, 600 and 700°C. The waste was carbonized fresh after extraction in hot water to remove extractives. Gravimetric yields were analyzed, as well as chemical features and high heating value. In the evaluation of the experiment, arranged in a factorial scheme with three factors (species x temperature x material with and without extraction), and Principal Component Analysis used too. The presence of extractives (soluble in hot water) from wood waste had little influence on the gravimetric yield and immediate chemical composition of charcoal; however, it showed a greater high heating value and lower contents of hydrogen and nitrogen. The increase in the final carbonization temperature reduced the gravimetric yield in charcoal, the content of volatile materials and hydrogen, with a higher content of fixed carbon, carbon and high heating value. The treatments with the best energy characteristics were obtained from Ipé and Maçaranduba charcoals with extractives produced at 600°C, in addition to Ipê and Maçaranduba charcoals with and without extractives obtained at 700°C. EFEITO DOS EXTRATIVOS E TEMPERATURA DE CARBONIZAÇÃO NAS CARACTERÍSTICAS ENERGÉTICAS DE RESÍDUOS MADEIREIROS DA AMAZÔNIARESUMO: O objetivo foi avaliar o efeito dos extrativos solúveis em água quente e temperatura final de carbonização no rendimento gravimétrico e propriedades do carvão vegetal em resíduos de três espécies florestais nativas, provenientes da região amazônica. Foram utilizados resíduos de aparas das espécies de ipê, garapa e maçaranduba, provenientes do processamento de usinagem da marcenaria de uma empresa do estado do Pará. As carbonizações foram realizadas em forno elétrico adaptado utilizando uma taxa de aquecimento de 1,67°C min -1 e temperaturas finais de 500, 600 e 700ºC. Os resíduos foram carbonizados in natura e após extração em água quente para remoção dos extrativos. Foram analisados os rendimentos gravimétricos, as análises químicas e o poder calorífico superior. A presença de extrativos solúveis em água quente dos resíduos das madeiras pouco influenciaram no rendimento gravimétrico e na composição química imediata do carvão vegetal, contudo apresentou maior poder calorífico superior, menor teor de hidrogênio e nitrogênio. O aumento da temperatura final de carbonização reduziu o rendimento gravimétrico em carvão vegetal, o teor de materiais voláteis e de hidrogênio, havendo aumento do teor de carbono fixo, teor de carbono e poder calorífico superior. Os tratamentos com as melhores características energéticas fo...

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Section: Gravimetric Yield and Immediate Chemical Analysismentioning

confidence: 83%

Section: Gravimetric Yield and Immediate Chemical Analysismentioning

confidence: 99%

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Effect of Extractives and Carbonization Temperature on Energy Characteristics of Wood Waste in Amazon Rainforest

Moulin

Nobre

Castro

et al. 2017

CERNE

Self Cite

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“…Depending on the wood sample size, different temperature ranges can occur simultaneously and, depending on the volume and the oven, carbonization at different temperatures are found along the profile (TRUGILHO & SILVA, 2001). Thus, one sample of wood can provide the degradation of different components at the same time.…”

Section: Monteiro T C Et Almentioning

confidence: 99%

“…Some studies evaluated the properties of charcoal as a function of final temperature and heating rate. Trugilho & Silva (2001) evaluated the influence of these parameters in Jatobá (Himenea courbaril) charcoal founding differences in fixed carbon, volatiles, ash and other yields, which depends on the final temperature of carbonization. Pinheiro et al (2005) studied the influence of temperature and heating rate on the properties of charcoal from Eucalyptus and obtained difference in yields of gravity and fixed carbon content, and the optimum temperature of the carbonization process in the range from 300 to 450ºC for Eucalyptus and the slower process increased the yield in charcoal.…”

Section: Monteiro T C Et Almentioning

confidence: 99%

Use of near infrared spectroscopy to distinguish carbonization processes and charcoal sources

Monteiro

Silva

Lima

et al. 2010

CERNE

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ABSTRACT:The near infrared spectroscopy (NIRS) has shown a rapid and accurate technique for evaluation of materials of biological origin. The objective of this study was to evaluate the ability of the near infrared (NIR) spectroscopy associated to the Principal Component Analysis (PCA) for the separation of carbonization processes and identification of the origin of the woods used in the carbonizations. Hence, the charcoal of seven species of Eucalyptus and twenty native species from the Cerrado (savannah) of Minas Gerais, Brazil were investigated. The Eucalyptus wood was carbonized in a laboratory furnace and in a 190 m 3 industrial rectangular kilns while the wood of native vegetation was carbonized only under laboratory conditions. The samples were grinded for NIR spectra acquirement. The NIR spectra were analyzed by PCA but no cluster were identified allowing discrimination between charcoal produced from native and from Eucalyptus wood. However, the cluster formed in the PCA when using the first derivative NIR spectra permitted to distinguish charcoal produced in different processes of carbonization. Two groups of data for charcoal produced in the industrial rectangular kilns were also observed, suggesting heterogeneity in the carbonization process.Key words: Charcoal origin, NIRS, principal component analysis. USO DA ESPECTROSCOPIA NO INFRAVERMELHO PRÓXIMO PARA DIFERENCIAR PROCESSOS DE CARBONIZAÇÃO E FONTES DE CARVÃO VEGETAL RESUMO: A espectroscopia no infravermelho próximo (NIRS) tem se apresentado uma técnica rápida e precisa para a avaliação de materiais de origem biológica. Objetivou-se, neste trabalho, avaliar a habilidade da espectroscopia no infravermelho próximo, em conjunto com Análise de Componente Principal (PCA), para separação dos processos de carbonização e a identificação de madeiras usadas na carbonização. Para isso foram realizadas carbonizações de sete espécies de Eucalyptus e vinte espécies nativas do

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Investigating the pyrolysis temperature to define the use of charcoal

et al. 2020

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INFLUÊNCIA DA TEMPERATURA FINAL DE CARBONIZAÇÃO NAS CARACTERÍSTICAS FÍSICAS E QUÍMICAS DO CARVÃO VEGETAL DE JATOBÁ (Himenea courbaril L.)

Cited by 41 publications

References 2 publications

Effect of Extractives and Carbonization Temperature on Energy Characteristics of Wood Waste in Amazon Rainforest

Effect of Extractives and Carbonization Temperature on Energy Characteristics of Wood Waste in Amazon Rainforest

Use of near infrared spectroscopy to distinguish carbonization processes and charcoal sources

Investigating the pyrolysis temperature to define the use of charcoal

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