摘要
利用热重法对裂殖壶藻的热解特性进行分析,升温速率分别为5、10、20、30、40、50℃/min。结果表明：微藻主要失重温度是158-519℃;随着升温速率的增大,主要热解区间的初始温度和最大峰值温度都向高温方向移动,热滞后现象加重。利用等转化率法中的FWO法和Kissinger法求得平均活化能为46.8915 k J/mol。采用主曲线法来确定热解过程的最可几机理函数,热解过程不能由单一的动力学方程描述,这是由于不同升温速率下,热解反应的主要控制因素不同。
The pyrolysis characteristics of schizochytrium was investigated by thermogravimetric analysis at different heating rates of 5,10,20,30,40 and 50 ℃ / min. The results showed that the most weight-losing of the residue occurred during the temperature range of 158 -519 ℃. The initial temperature of pyrolysis and the temperature at which the pyrolysis rate reached the peak value rose and thermal lagging became serious with the increasing of heating rate. The average value of activation energy was 46. 8915 k J / mol by using the FWO method and the Kissinger method in the isoconversional method. The most probable mechanism function was obtained by the master plots method. The pyrolysis reaction could not be dealt with as a single reaction model because the main controlling factors of pyrolysis reaction were different at different heating rates.
出处
《能源工程》
2016年第4期40-45,50,共7页
Energy Engineering
关键词
裂殖壶藻
热重分析
等转化率法
主曲线法
microalgae
thermogravimetric analysis
iso-conversional method
master plots method
