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中文摘要：
在热天平上考察了三种木材在不同气氛和升温速率下的热解行为，并利用分布活化能模型研究了三种木材的热解动力学．结果表明：在空气气氛下，热失重分为三个阶段，失重率为5％～60％时，三种木材的活化能值都在110～250kJ／mol，且非单调增加；在氮气气氛下，热失重分两个阶段，失重率在10％～85％时，三种木材的活化能值都在165-230kJ／mol，且呈“W”形变化．活化能的分布函数，反映了木材在热解、气化、燃烧过程中不同阶段的反应活性变化规律，有助于了解木材的热解和燃烧机理．
英文摘要：
Thermogravimetric analysis （TG） was used to study the pyrolysis characteristics of three species of woods, Dahurica pall, Quercus mongolica, and Pinus Sylvestris var, at different heating rates, in the stream of air or N2. Activation energies of them were obtained by using distribution activation energy model （DAEM）. The results indicate that, in air atmosphere, the pyrolysis processes of all the samples were divided into three stages according to the peaks on the DTG profiles. When the mass loss rate attains from 5% to 60%, the activation energies of samples are all between 110 and 250 kJ/ mol, not monotonously increasing. In nitrogen atmosphere, two main mass loss stages were found. At final temperature when the mass loss rate attains from 10% to 85%, the activation energies of these woods are all between 165 and 230 kJ/ mol, and the curves of activation energies show ＂W＂ shape. The distribution function of energy reveals the rule that the reaction activity of mass changes in different stages of pyrolysis, which helps to investigate the mechanisms of pyrolysis, gasification and combustion.
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