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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (10): 1281-1285. 上一篇    

研究简报

乙酰氧肟酸的热稳定性分析

焦爱红*,1，傅智敏2   

  1. (1中国人民武装警察部队学院 研究生一队 廊坊 065000)
    (2中国人民武装警察部队学院 消防工程系 廊坊 065000)
  • 投稿日期:2007-09-06 修回日期:2007-12-19 发布日期:2008-05-28
  • 通讯作者: 焦爱红

Thermal Stability Analysis of Acetohydroxamic Acid

JIAO, Ai-Hong*,1, FU, Zhi-Min2   

  1. (1 Section one of Graduate, Chinese People’s Armed Police Force Academy, Langfang 065000)
    (2 Department of Fire Protection Engineering, Chinese People’s Armed Police Force Academy, Langfang 065000)
  • Received:2007-09-06 Revised:2007-12-19 Published:2008-05-28
  • Contact: JIAO, Ai-Hong

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被引次数

8 | 2

为预防化工生产、储运和使用中由乙酰氧肟酸(Acetohydroxamic acid, AHA)引发的火灾和爆炸事故, 采用绝热量热法对其热稳定性进行实验研究, 并将加速量热仪(Accelerating Rate Calorimeter, ARC)的测试结果与差示扫描量热仪(Differential Scanning Calorimetry, DSC)的结果进行了比较. ARC绝热测试结果表明, AHA的初始放热温度为352.68 K, 最高放热温度为465.82 K, 最大温升速率和最大温升速率时间分别为8.748 K•min－1和382.65 min, 单位质量AHA生成气体的最大压力为2.22 MPa•g－1. 根据ARC绝热测试结果, 采用速率常数法计算了AHA的动力学参数表观活化能和指前因子, 并求出了AHA的某种典型包装的不可逆温度和自加速反应温度. 研究结果表明, AHA的热稳定性较差, 爆炸性较强.

关键词: 乙酰氧肟酸, 加速量热仪, 热稳定性

To prevent fire and explosion accident caused by acetohydroxamic acid (AHA), the adiabatic stability of AHA was investigated by an accelerating rate calorimeter (ARC) in this paper. Comparison of test results from ARC and differential scanning calorimetry (DSC) was carried out. The test results show that the initial exothermic temperature for AHA was 352.68 K, the maximum exothermic temperature was 465.82 K, maximum self-heating rate and the time to maximum self-heating rate were 8.748 K•min－1 and 382.65 min respectively, and the maximum pressure produced by unit mass was 2.22 MPa•g－1. The high thermal hazard and powerful explosion of AHA were demonstrated by the results of DSC and ARC. Finally, The kinetic parameters such as apparent activation energy and pre-exponential factor of the thermal decomposition of AHA were calculated by a rate constant method, and the temperature of no return (TNR) and self accelerating reaction temperature (TSART) of AHA with some specific package were predicted. The studies have revealed that AHA is sensitive to thermal effect, and the thermal decomposition is hazardous due to its serious pressure effect.

Key words: acetohydroxamic acid, accelerating rate calorimeter, thermal stability