菲与亚硝酸酯化合物(RONO)的光化学反应

PHOTOCHEMICAL REACTION OF PHENANTHRENE WITH ORGANIC NITRITE COMPOUND(RONO)

研究了涂在硅胶上的菲在流化床中与n-C_4H_9ONO(17±2ppm)分别在N_2、O_2和空气中的反应,观察到O_2可猝灭激发态或活化态RONO,影响反应活性的中间体的形成,抑制菲的反应,测得菲在空气和N_2里的光反应动力级数为零级,解析了反应产物结构。说明了产物生成的可能途径为硝化和氧化,或菲与OH反应后再发生硝化或氧化。研究了Al_2O_3和煤灰对菲与n-C_4H_9ONO/空气反应的影响,结果表明,不同颗粒物对反应的抑制作用为煤灰(七小时内未观察到反应)>Al_2O_3>SiO_2,酸度对反应影响不大,菲在Al_2O_2上的动力学反应级数为零级。

The reaction of phenanthrene coated on silica gel with n-C4H9ONO in fluidized bed has been studied in atmospheres of N2,O2 and air. It is shown that oxygen can quench the excited state of RONO,inhibit the reaction of phenanthrene and affect the formation of active intermediate compound. The order of photochemical reaction of phenanthrene is zero in air and ni-trogen. It seems that the reaction products can be formed by two paths:(1) nitrification and oxidation; (2) nitrification and oxidation after the reaction of phenanthrene with OH.The effect of different carriers——Al2O3, SiO2 and coal ash——on thereaction of phenanthrene with n-C4H3ONO has been investigated. The ability of inhibition is shown as following. coalash> Al2O3>SiO2. The order of chemical reaction of phenanthrene coated on A12O3 is zero.