柴油/甲醇燃烧微粒热解化学反应参数研究

应用热重/差热同步分析仪,在氧气氛围下对柴油/甲醇(M0/5/15)燃烧微粒进行了热解过程试验,得到了微粒的失重曲线和燃烧速率曲线。根据试验数据分析了微粒的热解过程、着火温度和燃尽特性指数,并计算了微粒的热解动力学参数。结果表明,随着甲醇掺混比的增大,微粒中挥发组分的质量减少,第1温度区间的热解速率峰值减小,固定碳颗粒的质量增加,第2温度区间的热解速率峰值增大;微粒的反应活化能降低,热解性能增强;微粒的着火温度降低,燃烧特性指数和燃尽特性指数上升,微粒的燃烧效率提高。

Pyrolysis Process of Diesel/Methanol Combustion Particulates

An experiment of pyrolysis process of diesel/methanol (M0/5/15) combustion particulate in oxygen was conducted by using the thermogravimetry/difference synchronization analyzer. According to the experiment data, the pyrolysis process, ignition point temperature and burnout characteristic index were calculated. The results showed that the volatile components of diesel/methanol combustion particulate were decreased and the quality of the fixed carbon particles were increased. The peak of pyrolysis rate in the first temperature interval was decreased and increased in the second temperature interval. The activation energy of the particles was reduced, and the pyrolysis performance was enhanced. The ignition point temperature was reduced, and the burning characteristic index and burnout characteristic index were increased. The combustion efficiency of particles were improved with the increase of methanol mixing proportion.