PYROLYSIS KINETICS OF MOSO BAMBOO

摘要

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 degrees C and 200-300 degrees C for cellulose and hemicellulose, respectively. The lignin degraded from 200 degrees 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 degrees C. The thermal decomposition of bamboo fibers occurred during 232-390 degrees 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.