GENERAL EQUATIONS OF CARBONIZATION OF Eucalyptus spp KINETIC MECHANISMS

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Túlio Jardim Raad Paulo César da C. Pinheiro Maria Irene Yoshida

Abstract

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.

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How to Cite
RAAD, Túlio Jardim; PINHEIRO, Paulo César da C.; YOSHIDA, Maria Irene. GENERAL EQUATIONS OF CARBONIZATION OF Eucalyptus spp KINETIC MECHANISMS. CERNE, [S.l.], v. 12, n. 2, p. 093-106, sep. 2015. ISSN 2317-6342. Available at: <http://cerne.ufla.br/site/index.php/CERNE/article/view/405>. Date accessed: 16 sep. 2019.
Keywords
Kinetic mechanism, carbonization, thermogravimetry, eucalyptus, hemicellulose, cellulose and lignin
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