摘要
本文应用小型干馏釜和LCT差热天平研究木材热解过程,并用红外光谱分析各种温度下固体残留物的官能团变化。证实木材组分在热解中,首先发生脱水排气和轻组分的分解,在200℃左右,木材三组分同时热解。半纤维素和纤维素反应十分剧烈,而木质素分解则十分平缓。400℃固体残留物尚未形成石墨结构。估计在600℃才能形成六碳环石墨层微晶结构。
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℃.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
1989年第3期13-22,共10页
Chemistry and Industry of Forest Products
关键词
木材热解
木材干馏
差热分析
Destructive distillation of wood
Thermogravimetric analy-sis
Differential thermal analysis
Carbonous residue
