Thermal decomposition kinetics of dehydroabietic acid in air

ZHU Yuanjiao; CHEN Xiaopeng; WANG Linlin; ZHONG Hua; LIANG Jiezhen; TONG Zhangfa

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Thermal decomposition kinetics of dehydroabietic acid in air

更新时间：2025-12-10

- Thermal decomposition kinetics of dehydroabietic acid in air
- CIESC Journal Issue 10, Pages: 2526-2530(2008)
- 作者机构：
  
  广西大学化学化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 October 2008，
  
  Published：05 October 2008
- 稿件说明：
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ZHU Yuanjiao, CHEN Xiaopeng, WANG Linlin, et al. Thermal decomposition kinetics of dehydroabietic acid in air[J]. CIESC Journal, 2008, (10): 2526-2530.
DOI：

ZHU Yuanjiao, CHEN Xiaopeng, WANG Linlin, et al. Thermal decomposition kinetics of dehydroabietic acid in air[J]. CIESC Journal, 2008, (10): 2526-2530. DOI：

摘要

采用TG/DTA/DSC热分析技术，在线性升温速率为5、10、15和20 K·min-1和静态空气条件下，研究了脱氢枞酸在空气气氛中的热分解动力学。由热重/差热法(TG/DTA)得到脱氢枞酸在空气中是一步分解；运用差示扫描量热法(DSC)测定了脱氢枞酸的熔点为445.05K，摩尔熔化焓为19.74 kJ·mol-1和摩尔熔化熵为44.35J·mol-1·K-1；分别利用Kissinger法和Flynn-Wall-Ozawa法对脱氢枞酸非等温热分解数据进行了动力学分析，同时利用Satava-Sestak法研究了脱氢枞酸的热分解机理。结果表明，脱氢枞酸的热分解机理为收缩球状界面反应模型R3，热分解反应的表观活化能为107.89 kJ·mol-1，指前因子为9.33×108 s-1)。

Abstract

The thermal decomposition kinetics of dehydroabietic acid in static state air was investigated by TG/DTA/DSC techniques with various heating rates of 5

15 and 20 K·min-1TG/ DTA curves showed that decomposition proceeded through a welldefined step in airThe melting point

molar enthalpy and entropy of fusion of dehydroabietic acid were determined as 445.05 K

19.74 kJ·mol-1 and 44.35 J·mol-1·K-1

by differential scanning calorimetry (DSC)The nonisothermal kinetics parameters were analyzed by means of the Kissinger and FlynnWallOzawa methods

and the thermal decomposition mechanism of dehydroabietic acid was also studied with the SatavaSestak methodThe results showed that the thermal decomposition mechanism of dehydroabietic acid in air was controlled by interface reaction R3

and the apparent activation energy and preexponential factor were 107.89 kJ·mol-1 and 9.33×108 s-1

respectively.

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