主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2024, Vol. 43 ›› Issue (8): 1163-1169.

• • 上一篇    下一篇

基于无模型拟合法和模型拟合法的樟子松松果热解动力学研究

黄天棋, 辛颖, 张敏   

  1. （东北林业大学 机电工程学院，黑龙江 哈尔滨 150040）
  • 收稿日期:2024-03-04 修回日期:2024-04-25 出版日期:2024-08-19 发布日期:2024-08-15
  • 作者简介:黄天棋(2000- )，女，黑龙江哈尔滨人，东北林业大学机电工程学院硕士研究生，主要从事森林火灾研究，黑龙江省哈尔滨市香坊区和兴路26号，150040。
  • 基金资助:
    基金项目：中央高校基本科研业务费专项资金资助项目（2572015CB05）;黑龙江省自然科学基金联合引导项目（LH2020C047）;校企技术开发项目（43218002）

Study on the pyrolysis kinetics of Pinus sylvestris pine cones by model-free fitting method and model-fitting method

Huang Tianqi, Xin Ying, Zhang Min   

  1. (College of Mechatronic Engineering, Northeast Forestry University, Heilongjiang Harbin 150040, China)
  • Received:2024-03-04 Revised:2024-04-25 Online:2024-08-19 Published:2024-08-15

摘要： 利用TA Q600同步热分析仪，在空气氛围下，2~3 mg粒径为250~420 μm的樟子松松果颗粒以10、15、20、25 K/min的升温速率线性升温至1 073 K左右，采用模型拟合法（Coats-Redfern法、Zsako法、Satava-Sestak法）和无模型拟合法（KAS法、Doyle法、FWO法）对松果热解动力学参数进行求解和比较，计算反应活化能E值、指前因子A。结果表明：松果热解主要包括4个阶段，主要质量损失阶段失重率占85%以上。无模型拟合法得到平均活化能分别为74.3 kJ/mol（Doyle法）、71.8 kJ/mol（FWO法）、68.3 kJ/mol（KAS法），且KAS法的活化能与指前因子曲线拟合R 2＞0.95；模型拟合法得到平均活化能为65.4 kJ/mol（Zsako法）、62.4 kJ/mol（Satava-Sestak法）、56.4 kJ/mol（Coats-Redfern），且Zsako法、Satava-Sestak法的平均活化能更接近无模型较准确的活化能，其中Satava-Sestak法的指前因子可反映热解反应机理的复杂性。建议将KAS法与Satava-Sestak法结合，更好地评价樟子松松果的燃烧性。

关键词: 樟子松松果, 热重分析, 无模型拟合法, 模型拟合法, 动力学

Abstract: Using the TA Q600 synchronous thermal analyzer, the 2～3 mg pinecone particles with a particle size of 250～420 μm were linearly heated to about 1 073 K at the heating rate of 10 K/min, 15 K/min, 20 K/min and 25 K/min in an air atmosphere. Model fitting method (Coats-Redfern method, Zsako method, Satava-Sestak method) and no model fitting method (KAS method, Doyle method, FWO method) were used to solve and compare the kinetic parameters of pine pyrolysis, and the value of activation energy E and pre-index factor A were calculated. The results show that the pyrolysis of Pinus sylvestris pine cones includes four stages, and the mass loss ratio of the main mass loss stage is more than 85%. The average activation energies obtained by the modelless fitting method were 74.3 kJ/mol (Doyle method), 71.8 kJ/mol (FWO method) and 68.3 kJ/mol (KAS method), respectively, and the fitting curves of the activation energies of KAS method and the predigital factor were > 0.95. The average activation energies obtained by model fitting were 65.4 kJ/mol (Zsako method), 62.4 kJ/mol (Satava-Sestak method), 56.4 kJ/mol (Coats-Redfern). The average activation energy of Zsako method, and Satava-Sestak method is closer to the activation energy without model, and the pre-exponential factor of Satava-Sestak method can reflect the complexity of the pyrolysis reaction mechanism. This paper suggests that KAS method and Satava-Sestak method should be combined to better evaluate the burning property of Pinus sylvestris pine cones.

Key words: Pinus sylvestris pine cones, thermogravimetric analysis, model-free fitting method, model-fitting method, dynamics