摘要
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。
The effects of the oxygen concentration on the pinewood pyrolysis characteristic were studied through the experiments under five different oxygen concentrations （0%, 5%, 10%, 15%, 21%）by thermogravimetric-mass spectrometry （TG-MS）. The differential scanning calorimeter （DSC） curves displayed the heat of the pyrolysis process. The kinetic parameters were calculated. Results show that oxygen had significant effects on pyrolysis： accelerating the reaction rate. All the pyrolysis processes were well described by kinetic parameters and there were compensation effects between them. As the oxygen concentration expanding, the exothermic temperature range became narrower and the exothermic peak increased. For other gases except 1-12, the oxygen narrowed the releasing temperature range and favored the releasing peak.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第26期117-123,共7页
Proceedings of the CSEE
关键词
氧量
热解
焦炭
热效应
松木
oxygen concentration
pyrolysis
char
heat
pinewood
