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Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/14793

Title: GENERAL EQUATIONS OF CARBONIZATION OF Eucalyptus spp KINETIC MECHANISMS
???metadata.dc.creator???: Raad, Túlio Jardim
Pinheiro, Paulo César da C.
Yoshida, Maria Irene
Keywords: Kinetic mechanism, carbonization, thermogravimetry, eucalyptus, hemicellulose, cellulose and lignin
Publisher: CERNE
CERNE
???metadata.dc.date???: 21-Sep-2015
Other Identifiers: http://www.cerne.ufla.br/site/index.php/CERNE/article/view/405
Description: In the present work, a set of general equations related to kinetic mechanism of wood compound carbonization: hemicelluloses, cellulose and lignin was obtained by Avrami-Eroffev and Arrhenius equations and Thermogravimetry of Eucalyptus cloeziana, Eucalyptus camaldulensis, Corymbia citriodora, Eucalyptus urophylla and Eucalyptus grandis samples, TG-Isothermal and TG-Dynamic. The different thermal stabilities and decomposition temperature bands of those species compounds were applied as strategy to obtain the kinetic parameters: activation energy, exponential factor and reaction order. The kinetic model developed was validated by thermogravimetric curves from carbonization of others biomass such as coconut. The kinetic parameters found were - Hemicelluloses: E=98,6 kJmol, A=3,5x106s-1 n=1,0; - Cellulose: E=182,2 kJmol, A=1,2x1013s-1 n=1,5; - Lignin: E=46,6 kJmol, A=2,01s-1 n=0,41. The set of equations can be implemented in a mathematical model of wood carbonization simulation (with heat and mass transfer equations) with the aim of optimizing the control and charcoal process used to produce pig iron.
???metadata.dc.language???: por
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