Abstract
Fe-containing MFI zeolite catalysts were prepared by different methods to obtain different Fe speciation and applied in the direct hydroxylation of benzene to phenol reaction with H2O2. The Fe speciation were characterized by UV–vis and NO adsorbed FT-IR techniques in details. The effects of various reaction parameters on the catalytic performance and the reusability of the catalyst have been studied. Under optimized reaction conditions, directly synthesized Fe-silicalite-1 showed the highest phenol yield of 5.7%, which was higher than post-synthesized Fe-silicalite-1 and Fe-ZSM-5. Furthermore, the phenol yield can be improved to 7.6% by alkaline treatment. Finally, the active Fe species for the BTP reaction were clarified.
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