喷气燃料热氧化衰变机理研究

STUDY ON THERMAL OXIDATION MECHANISM OF JET FUEL

通过自建模拟氧化装置,考察了加热与通氧条件下喷气燃料的替代燃料正十二烷的氧化过程,利用气相色谱?质谱分析技术(GC?MS)从分子层面分析热氧化过程的产物组成和结构。根据反应物的消耗速率和氧化产物的结构组成差异,探讨各组分在加热氧化条件下的衰变特征。研究结果表明:在热氧化过程中,正十二烷的热氧化反应表现为一级反应;其热氧化衰变规律符合自由基连锁反应原理;在本实验温度范围内,氧化温度的高低不会改变氧化路径,但是对氧化速率有影响,并且主要氧化产物具有一致性。

A self-built simulation oxidation device was used to investigate the oxidation process of the n -dodecane under the condition of heating and oxygen. The product compositions of the thermal oxidation process were analyzed from the molecular level using GC MS. According to the consumption rate of reactants and the compositions of oxidation products,the decay characteristics of each component under the condition of heating oxidation were discussed. The results showed that the thermal oxidation of n -dodecane is a first order reaction. Thermal oxidation decay law is in accordance with the principle of free radical chain reaction. In the range of experimental temperature,the oxidation temperature does not change the oxidation path,but affects the oxidation rate,and the main oxidation products are consistent.