Effect of temperature on kinetic parameters of decomposition reaction of calcium carbonate

CHEN Hongwei; CHEN Jiangtao; WEI Riguang; SUO Xinliang School of Energy Power and Mechanical Engineering

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Effect of temperature on kinetic parameters of decomposition reaction of calcium carbonate

更新时间：2025-09-28

- Effect of temperature on kinetic parameters of decomposition reaction of calcium carbonate
- Thermal Power Generation Vol. 42, Issue 6, Pages: 21-25(2013)
- 作者机构：
  
  华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK16
- Published：2013
- 稿件说明：
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CHEN Hongwei, CHEN Jiangtao, WEI Riguang, et al. Effect of temperature on kinetic parameters of decomposition reaction of calcium carbonate[J]. Thermal power generation, 2013, 42(6): 21-25.
DOI：

CHEN Hongwei, CHEN Jiangtao, WEI Riguang, et al. Effect of temperature on kinetic parameters of decomposition reaction of calcium carbonate[J]. Thermal power generation, 2013, 42(6): 21-25. DOI：

摘要

采用自建的大剂量热重分析仪对分析纯CaCO3进行煅烧分解的热重试验

得到了温度对CaCO3分解过程动力学参数的影响规律。分析结果表明:CaCO3分解反应性指数随温度升高呈阶段性增长

而动力学参数随温度升高呈阶段性减小

但均可分为3个阶段

且不同阶段的温度转折点相同;相边界反应(圆柱形对称)机理较适合N2环境气氛下CaCO3热分解反应

反应活化能和指前因子的对数随温度的升高变化规律相似

二者线性关系良好

存在动力学补偿效应;根据补偿系数推导出CaCO3煅烧的等动力学温度约842℃

反应速率常数为0.104 9min-1。

Abstract

In order to investigate the influence of temperature on behavior of calcium carbonate decomposition

especially on kinetic parameters of the decomposition reaction

the analytically pure calcium carbonate was calcined on a self-built large dose thermogravimetric analyzer.The results indicated that

with an increase in the reaction temperature

the reactivity index of calcium carbonate decomposition increased at stage state while the kinetic parameters decreased at stage state.Moreover

both the reaction indices and the kinetic parameters can be divided into three stages and the temperature turning points in different stages were the same.The phase boundary reaction(cylindrical symmetry) theory was more suitable for calcium carbonate calcination under N2 atmosphere.The change trend of the logarithm of reaction activation with temperature was similar as that of the pre-exponential factor.There existed good liner relationship and kinetic compensation effect between them.The isokinetic temperature of the CaCO3 calcination was 842 ℃ and the reaction rate constant was 0.104 9 min-1 derived by the compensation coefficients.

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