T-Jump/FTIR联用技术研究CL-20的热分解机理

Investigation on thermal decomposition of CL-20 by T-Jump/FTIR

用T-Jump/FTIR联用技术,在高纯氮气气氛、不同压力、不同裂解温度和1 000 K/s的快速升温速率条件下,研究了CL-20的快速热裂解过程。用快速扫描傅立叶变换红外光谱实时跟踪分析分解产物的种类和浓度变化,考察了实验温度和压力对CL-20快速热裂解气相产物N2O/NO2和NO/NO2比值的影响。结果证实,CL-20的分解首先是从N—NO2键的断裂开始,生成NO和其他较稳定的气体产物(如CO、CO2和H2O等),这种N—N键断裂的反应因压力和温度增大而加速,气态NO2生成后又与凝聚相和其他活性还原性气体产物(如CH2O)发生二次反应,经中间产物而产生N2O。

The dependence of the pyrolysis processes of CL-20 on pressure and temperature were investigated by using T-Jump/FTIR at high heating rate of 1 000 K/s.With the help of rapid scanning fourier transform infrared（FTIR） spectroscopy,the kind and concentration of the gas products were measured and analyzed.The influence of temperature and pressure on N2O/NO2 and NO/NO2 ratios in the gas products from fast pyrolysis of CL-20 was studied.The results show that CL-20 firstly release NO2,NO,CO,CO2 and H2O,which are relative inactivity gases,were produced subsequently.It is considered that the formation of NO2 during CL-20 decomposition is favored at higher temperature and pressure.The results show that secondary reaction occurs between NO2 and other reductive gases,such as CH2O.