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基于热重–质谱联用仪上松木在5种不同氧量气氛下(0%、5%、10%、15%、21%)的热解实验研究考察了热解气氛中氧气浓度对热解特性的影响,通过差式扫描量热分析曲线讨论了氧量对反应热效应的影响,并对热解过程的动力学特性进行了分析。结果表明:氧气对松木热解2个阶段都有重要影响,氧气加速了热解反应;所求解的动力学参数能较好的描述反应过程,有氧热解过程存在动力学补偿效应;氧浓度的增大减小了反应放热温度范围,增大了放热峰峰值;除H2外的其他气体随着氧浓度的增大,析出温度范围变窄,析出峰峰值增大。
Based on pyrolysis experiments of pine wood in 5 different oxygen atmospheres (0%, 5%, 10%, 15%, 21%) on a TG-MS system, the effect of oxygen concentration in pyrolysis atmosphere on pyrolysis The influence of oxygen amount on the reaction thermal effect was discussed by the differential scanning calorimetry curve. The kinetic characteristics of the pyrolysis process were also analyzed. The results show that oxygen has an important effect on the pyrolysis of pine wood in two stages. Oxygen accelerates the pyrolysis reaction. The kinetic parameters can describe the reaction process well. There is a kinetic compensation effect in the oxygen pyrolysis process. Increases the exothermic reaction temperature range, and increases the exothermic peak-to-peak value. With the increase of oxygen concentration, other gases except H2 have a narrower range of precipitation temperature and larger peak-to-peak precipitation.