高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (11): 1513.

• 论文 • 上一篇    下一篇

草酸锰分解过程的机理函数判别和动力学研究

李靖华, 张桂恩, 黄山   

  1. 河南师范大学化学系, 新乡, 453002
  • 收稿日期:1990-08-15 出版日期:1991-11-24 发布日期:1991-11-24
  • 通讯作者: 李靖华

Identification of Mechanism Function and Investigation on the Kinetics of Thermal Decomposition of MnC2O4

Li Jing-hua, Zhang Gui-en, Huang Shan   

  1. Department of Chemistry, Henan Normal University, Xinxiang, 453002
  • Received:1990-08-15 Online:1991-11-24 Published:1991-11-24

摘要: 用等温热重和线性升温热重分析法研究了草酸锰热分解过程,提出了判断其机理函数的3步判别法。经实验和理论分析证明,该反应受随机成核和晶核随后生长的过程(A3a机理)支配,其活化能E=103.95kJ/mol,频率因子A=4.448×108min-1.动力学补偿效应为IgA=0.09661E-1.2856。

关键词: 草酸锰, 动力学, 热重分析

Abstract: The thermal decomposition of MnC2O4was studied by means of thermogravimetry both at the constant temperature and linearly increasing temperature. Three-stage identification of the function depending on the mechanism is suggested. The experimental results and theoretical analysis show that the thermal decomposition of MnC2O4is dominated by an A3mechanism. The activation energy E=103. 95 kj/mol, the frequency factor A=4. 448×108min-1. Its kinetic compensation effect is: lgA=0. 09661E-1. 2856.

Key words: Manganese oxalate, Kinetics, Thermogravimetry

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