Abstract
A NiO Fe 2O 3 Na 2O catalyst achieved an extremely high space-time yield (STY) of phenol, while maintaining a high phenol selectivity, as compared with that of a conventional CuO catalyst for the vapor phase oxidation of benzoic acid. The addition of Na 2O to NiO Fe 2O 3 catalyst was found to be very effective in increasing the STY of phenol, while maintaining a high phenol selectivity. The effect of temperature, oxygen ratio, H 2O ratio, and space velocity on the catalyst performance were examined in order to optimize the phenol selectivity and STY of phenol. The reaction route for phenol formation over the Na 2O-promoted NiO Fe 2O 3 catalyst was also speculated upon by considering the deactivation of the catalyst.
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