Pyrolysis kinetics of moso bamboo
Abstract
Pyrolysis processes of moso bamboo (Phyllostachys pubescens), bamboo fiber, cellulose, hemicellulose, and lignin were investigated by thermogravimetric analyzer at different heating rates under nitrogen environment. Coatse-Redfern (CR) and Kissinger-Akahira-Sunose model were used to calculate pyrolysis kinetics. The results showed that the thermal degradation occurred during 300-400°C and 200-300°C for cellulose and hemicellulose, respectively. The lignin degraded from 200°C to the end of the process. The pyrolysis process of moso bamboo could be divided into three steps, which all occurred during 130-560°C. The thermal decomposition of bamboo fibers occurred during 232-390°C. As the heating rate increased, the pyrolysis processes of all samples shifted to higher temperatures. The minimum activation energy of each sample was found at different heating rates from the CR model. The results will be helpful to understand the pyrolysis mechanism of moso bamboo to effectively design its thermochemical conversion process.
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