模型化合物吡啶、吡咯氧化规律实验研究

EXPERIMENTAL INVESTIGATION ON THE OXIDATION RULES OF PYRIDINE AND PYRROLE AS MODEL COMPOUNDS

选用吡啶和吡咯作为模型化合物,在500～1100℃温度范围内,对其进行单独氧化和混合氧化的产物实验研究.实验结果表明,在γ≤1的时候,吡啶的三种氮氧化物N_2O、NO和NO_2的生成率随γ的增加明显增加,在γ>1的时候,三种氮氧化物的生成率随γ的增加则变化不明显。对于吡啶和吡咯,CO和N_2O都只在特定的温度区间内600～700℃和600～1000℃生成,而NO和NO_2的生成率在超过700℃以后趋于稳定。吡啶的氧化过程对氧量变化比较敏感,而吡咯则不敏感。在混合物中,吡咯是优先氧化的。

As model compounds, the pyridine and pyrrole are heated to the temperature ranging from 500℃ to 1100℃. The components are analyzed when the pyridine and pyrrole are oxidized both separately and together. The results show that, in the oxidation of pyridine, when the amount of is smaller than or equal to 1, the production rates of N2O, NO and NO2 increase remarkably as the amount of γ increases, but they have inconspicuous enhancements when the amount of γ is larger than 1. Moreover, in both oxidations of pyridine and pyrrole, CO exists at the temperature range of 600 - 700℃, and N2O at that of 600 - 1100℃. The production rates of NO and NO2 become steady when the temperature is higher than 700℃. The pyridine is not sensitive to the change of the quantity of oxygen, while the pyrrole is the opposite. Finally, in the process of the oxidation of the mixture, oxidation of pyrrole is prior to that of pyridine.