中文摘要：

以CO2和干空气为动态气氛,在10,20,30℃/min三种升温速率下进行热重实验,研究了气氛对压缩木屑颗粒热解反应的影响,用Netzsch Thermokinetics 3软件确定了失重曲线第2失重阶段的反应级数,用Coats-Redfern积分法计算了第2失重阶段的动力学参数,用气相色谱分析了放大实验在升温速率10℃/min下产生的热解气体成分.结果表明,在CO_2和干空气气氛下,随温度升高,木屑颗粒均出现3个失重阶段,第2阶段的失重分别为65.97%和56.31%,热解反应级数分别为1.2和1.0,活化能分别为117.73和87.4 k J/mol,指前因子分别为5.8′106和1.1×10~4 min~（-1）.与空气气氛相比,CO_2气氛下裂解气中CH_4产量相对较低,而H_2和CO产量较高.

英文摘要：

To explore the effect of atmosphere on the pyrolysis reaction of compressed wood chips particles,the thermo-gravimetric experiments with carbon dioxide and dry air as the dynamic gases under heating rates of 10,20,30℃/min were conducted by using synchronous thermal analyzer.Aiming at the second mass loss stage of thermo-gravimetric curves,the software of Netzsch Thermokinetics 3 was used to analyze the reaction orders,and Coats-Redfern method was used to calculate the kinetic parameters.Moreover,gas chromatography was applied to determine the composition of pyrolysis gases produced from enlarged experiment of thermo-gravimetric experiment at the heating rate of 10℃/min.The results showed that there are 3 weightless stages in the heating process of wood particle under these two kinds of atmosphere.In carbon dioxide and dry air,the second stage weight loss were 65.97% and 56.31%,the thermal decomposition reaction series were 1.23 and 1.0,the activation energies of this pyrolysis phase were117.73 and 87.4 k J/mol,and the preexponential factor were 5.8×10~6 and 1.1×10~4 min~（-1）,respectively.In the pyrolysis gases,the concentration of methane is lower in carbon dioxide than in dry air,while hydrogen and carbon monoxide are higher.