绝热条件下磷酸三丁酯-正十二烷-硝酸体系放热反应行为

Exothermic Reaction Behavior of TBP With Nitric Acid and n-Dodecane Under Adiabatic Conditions

本工作采用绝热加速量热仪重点研究了磷酸三丁酯(TBP)与HNO_3以及30%TBP-70%正十二烷与HNO_3的放热反应行为,并通过这两个系列测试结果的对比分析,确定了该研究条件下稀释剂对放热反应的影响。结果表明,HNO_3浓度越高,TBP或TBP-正十二烷与HNO_3发生的自放热反应的起始温度越低,放热量越高,造成的压力增加也越高。绝热条件下,与TBP和HNO_3的化学反应相比,有稀释剂正十二烷存在的化学反应,其起始温度和活化能更低,同时释放热量更高,此化学反应更易发生。

The exothermic reaction behavior of TBP with nitric acid and 30%TBP-70% ndodecane with nitric acid was studied by adiabatic accelerating calorimeter.The influence of the diluent on the exothermic reaction was determined by the comparison and analysis of the two series of test results.The results show that the higher the concentration of nitric acid,the lower the onset temperature of the self-exothermic reaction of TBP or TBP-n-dodecane and nitric acid,the higher the heat release and the pressure increase.Under adiabatic conditions,the presence of diluent n-dodecane exacerbates the exothermic reaction,resulting in lower reaction initial temperature,lower activation energy,and higher energy release.