摘要
对由木粉热解所得的生物油样品分别进行了氮气与氧气气氛下不同升温速率的热重分析试验。结果表明:生物油的热解分为两个阶段,第一阶段为生物油中低沸点有机物的挥发以及各组分间反应生成各类产物的过程,第二阶段为各种重组分的裂解过程;生物油的燃烧分为3个阶段,即前期的挥发与裂解和最后焦炭的燃烧过程。提高升温速率使氮气气氛中生物油样品的初始失重温度、失重峰值温度及对应的最大失重速率均有所增大,且在较高升温速率(20℃/min)下,较少含炭残余物形成。随升温速率升高,生物油着火温度提高,最终失重率无变化。最后根据热重数据对热解与燃烧各段反应进行了动力学拟合。
The thermo-gravimetric analysis of bio-oil produced from fast pyrolysis of wood powder was carried out in O2 and N2 under different heating rates to a maximum temperature of 1000℃. The results indicate that bio-oil pyrolysis occurs in 2 steps. The evaporation of low-boiling point compounds and the reactions among different compounds happened in the first step and then followed by the cracking of heavy fractions. Bio-oil combustion occurs in three steps, the first two are similar to the process of evaporation and pyrolysis of bio-oil, and then the char formed during the process of evaporating and cracking combusts rapidly. With increase of heating rate, the starting temperature of weight loss, the temperature corresponding to the maximum velocity of weight lose all rise, and less residue forms at high heating mte（20℃/min）. The ignition temperature of bio-oil rises with increasing heating rate, but the final weight loss does not change. Kinetic parameters were simulated according to the data for pyrolysis and combustion of bio-oil.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第6期733-737,共5页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50576100)
广东省自然科学基金团队项目(003045)
关键词
生物油
热解
燃烧
动力学
bio-oil
pyrolysis
combustion
kinetics
