The kinetics of the semi-batch oxidative synthesis of aniline under atmospheric pressure using DuPont's NiO/ZrO 2 cataloreactant was studied in a microreactor flow set-up equipped with a calibrated online mass spectrometer. It was found that the reaction temperature is a crucial parameter for the selectivity to aniline. At 590 K, exclusively aniline was formed, whereas at higher temperatures the decomposition of benzene into C-1 fragments led to the formation of toluene and benzonitrile. TPO experiments carried out in the same reactor subsequent to isothermal aniline synthesis allowed us to derive the degree of coking and the degree of NiO reduction.
Suspended amination: Semi‐batch oxidative synthesis of aniline from benzene and ammonia was performed at atmospheric pressure using a NiO/ZrO2 cataloreactant in a microreactor flow setup. A Langmuir–Hinshelwood mechanism is suggested based on the surface reaction between adsorbed benzene‐ and ammonia‐derived NHx species on metallic Ni surface sites.
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