摘要
利用改进的恒温热重实验系统,在富氧气氛下对玉米芯与煤混合样品进行恒温燃烧实验,建立适用于玉米芯混煤富氧燃烧的双组分分阶段反应模型。利用该模型求得的参数能体现挥发分和焦炭燃烧两阶段反应机制的差异及燃烧难易程度,可用于解释玉米芯混煤恒温燃烧的机理。不同温度、O_2浓度、玉米芯掺混比和煤种下,利用双组分分阶段反应模型得到的模拟曲线和实验曲线吻合度较高,模型的判定系数R^2均在0.998以上。
The isothermal combustion experiment of corncob/coal blends was carried out by a modified isothermal thermogravimetric system in oxygen-enriched atmosphere, and a double component phased reaction model which is suitable for the oxygen-enriched combustion of corncob/coal blends was established. Parameters obtained by double component phased reaction model can reflect the difference of reaction mechanism and burning speed between the two phases of volatiles and coal char combustion, which can explain the isothermal combustion mechanism of corncob/coa｜ blends. Simulation curves obtained by double component phased reaction model coincide with the experiment curves well under different temperatures, O2 concentration, corncob blending ratio and types of coal, and all the determination coefficient（R2） of the model are greater than 0.998.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第11期2761-2767,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51276064)
关键词
恒温热重
富氧气氛
玉米芯
煤
混燃
动力学模型
isothermal thermogravimetric
oxygen-enriched atmosphere
corncob
coal
blended combustion
kinetics model
