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《Chemistry & Industry of Forest Products》 1989-03
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PYROLYSIS OF EIGHT WOOD-BASE MATERIALS AND THEIR MAIN COMPONENTS——APPROACH TO THE MECHANISM OF PYROLYSIS

Yu Wei Wu Xinhua ( Fujian Forestry College Nanpin )  
The mechanism of pyrolysis of eight wood-base materials was investigated with a small-scale pyrolyser and LCT differential analytic balance. The changes of the functional groups in charred substances resulted from various temperatures were analysed by means of infrared spectrum. It was found from the results obtained in this study, that water and air in wood escaped and wood components with low molecular weight discomposed first and then the three main components started to degrade almost simultaneously at about 200℃. Reactions of hemicellulose and cellulose were strong, but that of lignin was moderate. The carbonous residues obtained at 400℃ did not form a carbon-graphite structure. But it is estimated according to activation energy that crystalline structure of hexacarbocycle carbpn-graphite should be formed at about 600℃.
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