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Title
Pyrolysis of pine and beech wood samples under isothermal experimental conditions. The determination of kinetic triplets
Authors
BOJAN Z. JANKOVIC and MARIJA M. JANKOVIC
Received
January 9, 2013
Published
Volume 47 Issue 9-10 October-December
Keywords
wood, pyrolysis, kinetics, diffusion mechanism, apparent activation energy
Abstract
The pyrolysis process of pine and beech wood samples was investigated by the isothermal thermogravimetric
technique, at five different operating temperatures, in nitrogen flowing stream. It was found that the isothermal
pyrolysis process of wood samples can be described by the three-dimensional diffusion mechanisms, with different
reaction geometry (Jander’s type for pine, and Ginstling-Brounstein’s type for beech). The evaluated models for both
processes represent the global one-step reaction mechanisms. Some differences in the values of the kinetic parameters
and diffusion geometry of the volatile products were established, probably resulting from sensitive alterations of the
structure and the chemical composition of the investigated wood samples, occurring during the pyrolysis process.
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