物理化学学报 >> 2005, Vol. 21 >> Issue (02): 134-138.doi: 10.3866/PKU.WHXB20050205

研究论文 上一篇    下一篇

用绝热测试的压力数据计算分解反应的表观活化能

钱新明;刘丽;冯长根   

  1. 北京理工大学爆炸灾害预防、控制国家重点实验室,北京 100081
  • 收稿日期:2004-06-28 修回日期:2004-08-30 发布日期:2005-02-15
  • 通讯作者: 钱新明 E-mail:xm.qian@263.net

Calculating Apparent Activation Energy of Adiabatic Decomposition Process Using Pressure Data

QIAN Xin-Ming;LIU Li;FENG Chang-Gen   

  1. State Key Laboratory for Prevention and Control of Explosion Disasters, Beijing Institute of Technology, Beijing 100081
  • Received:2004-06-28 Revised:2004-08-30 Published:2005-02-15
  • Contact: QIAN Xin-Ming E-mail:xm.qian@263.net

摘要: 绝热量热技术的广泛应用促进了绝热动力学研究的发展.至今为止,绝热动力学的研究仍是以Townsend 和 Tou在1980年提出的绝热动力学方程为基础.他们利用反应物浓度与温度的关系建立动力学模型,从而求得了反应的活化能.但这种方法在反应体系的温度效应不明显时的应用,就受到很大的限制.因此,本文通过建立用压力表示的动力学方程,充分利用绝热量热中的压力数据,提出了一种计算反应活化能的新方法.同时用这种方法计算了过氧化二叔丁基和2-甲基-5-硝基苯磺酸的绝热分解活化能值,并与文献值和其他计算方法所得结果进行了比较.

关键词: 活化能, 绝热分解, 压力, 绝热加速量热仪(ARC)

Abstract: Considering the limitation of now available adiabatic kinetic analysis, a method to calculate activation energy by dealing with pressure data obtained from the adiabatic measurement is proposed. New kinetic equation is established and the apparent activation energies for the thermal decomposition of di-tert-butyl peroxide and 2-methyl-4-nitrobenzenesulfonic acid are calculated. The obtained apparent activation energies are compared with the values in the literature and the values obtained from other methods, and the difference between them and the underlying reasons are discussed.

Key words: Activation energy, Adiabatic decomposition, Pressure, Accelerating Rate Calorimeter