飞机燃油抗氧剂膦化物的氧化反应的热力学研究

Thermodynamic study of phosphine oxidation mechanism as potential effective antioxidant for jet fuel

膦化物为高性能飞机燃油潜在的抗氧剂,能显著地改善飞机燃油的高温稳定性能。实验结果表明,在自由基抑制剂存在下,膦化物的氧化反应(>120℃)是通过膦化物与氧气的直接作用而进行,实验的热力学数据表明,膦化物的氧化反应是通过磷原子与氧气中氧原子间电荷部分转移形成过渡态而进行的;极性溶剂可降低反应的活化能,取代基则对活化能的影响较小。

Phosphine is the potential antioxidant for jet fuel and can improve the stability of jet fuel at high temperature.The experimental results indicate in the presence of free radical inhibitor,the oxidation（120 ℃） of phosphine operation between phosphine and oxygen directly.Thermal dynamic data indicate the reaction occurs through a partial charge transfer between phosphor and oxygen atom.Polar solvent can facilitate the reaction by lowering the activation energy,while the substitute has less effect on the activation energy.