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Title
TG-FTIR analysis of pine sawdust pyrolytic kinetics
Authors
XIAOLI GU XU MA LIXIAN LI CHENG LIU KANGHUA CHENG ZHONGZHENG LI
Received
April 25, 2012
Published
Volume 47 Issue 1-2 January-February
Keywords
pine sawdust, pyrolysis, reaction kinetics, TG-FTIR
Abstract
The pyrolysis of certain pine sawdust was studied by thermogravimetric analyzer coupled with Fourier transform
infrared spectroscopy (TG-FTIR). Different heating rates were applied to a final temperature of 950 °C. Total loss
weights of 78%, 79% and 83% at heating rates of 20 °C/min, 40 °C/min and 80 °C/min, respectively, were observed,
and the temperature trend of evolving gaseous products, such as CH4, H2O, CO and CO2, was investigated. The plot of
the thermal decomposition rate curve leads to kinetic parameters, which were calculated by Kissinger’s and Ozawa’s
methods; the activation energy of the substrate was of 130.14 and 133.21 kJ·mol-1, respectively, and the frequency
factor, of 2.594×1011 and 3.143×1011 min-1. The results show that the above-mentioned methods successfully represent
decompositon curves and fit the experimental data very well. Therefore, this study provides a simple way to evaluate
the pyrolytic rate of biomass in a real combustor.
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