原位漫反射红外光谱法研究N2O和苯在Fe-ZSM-5分子筛表面的吸附

利用原位漫反射红外光谱研究了不同条件下，N₂O和苯在离子交换法制备的Fe-ZSM-5分子筛表面的吸附情况。实验结果表明：Fe-ZSM-5分子筛上B酸和铁离子对N₂O有吸附作用；两种吸附位对N₂O的吸附强度不同，B酸酸性位的吸附能力强于铁离子位对N₂O的吸附能力；苯和N₂O分子的吸附可以在不同形式的铁离子位进行；N₂O为氧化剂的苯一步氧化制取苯酚反应遵循双活性位L-H反应机理。

In situ diffuse reflectance Fourier transform infrared spectroscopy (in situ DRIFTS) investigation of N2O and benzene adsorption on Fe-ZSM-5 zeolite

The adsorption of N₂O and benzene on the Fe-ZSM-5 zeolite prepared by liquidion-exchange has been investigated by in situ diffuse reflectance Fourier transform infrared spectroscopy (in situ DRIFTS) under different conditions. It was found that N₂O can be adsorbed on both the Bronsted acid sites and the Fe³⁺ ion sites of the Fe-ZSM-5 zeolite, but that the affinity of the Bronsted acid sites for N₂O is higher than that of the Fe^3+_-ion sites. Benzene and N₂O can be adsorbed on different Fe-ion sites. The results suggest that benzene and N2O react by a Langmuir-Hinshelwood mechanism in the selective oxidation of benzene to phenol.