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采用T-Jump/FTIR快速热裂解原位红外光谱联用技术研究了奥克托金(HMX)在0.1,0.2,0.3和0.4MPa的Ar气条件下,以1000℃·s-1的升温速率快速升温至设定的反应温度,用快速扫描傅立叶变换红外光谱跟踪分析分解产物的种类和相对摩尔浓度的变化,研究了温度及压力对初始检测产物的影响.结果表明,HMX在快速热裂解5s过程中红外所检测到的主要气相产物为CO,CO2,NO,NO2,N2O,HCONH2,CH2O,H2O,HNCO及HCN,并给出了这些产物相对摩尔浓度随时间变化的曲线.根据气体产物相对摩尔浓度的比率N2O/HCN,研究了压力和反应温度对HMX的快速热裂解过程及机理的影响,认为在低温HMX分解的C—N键断裂在两竞争反应中占优,通过压力的变化证明了气相产物之间存在二次反应.
Using T-Jump / FTIR rapid pyrolysis in-situ FTIR spectroscopy, we studied the effect of the oxidation of oxotokines (HMX) The temperature and pressure were used to investigate the effect of temperature and pressure on the initial detection results.The results showed that HMX was rapidly pyrolyzed for 5s The main gaseous products detected by infrared during the process are CO, CO2, NO, NO2, N2O, HCONH2, CH2O, H2O, HNCO and HCN, and give the curves of the relative molar concentrations of these products as a function of time. Molar ratio of N2O / HCN, the effects of pressure and reaction temperature on the rapid pyrolysis process and mechanism of HMX were studied. It is concluded that the fracture of C-N bond at HMX decomposition at low temperature is dominant in the two competitive reactions, and the change of pressure There is a second reaction between the gas phase products.