Design of Effective Geria-supported IvlnOx Catalysts for the CWO of Phenol

摘要

The effects of preparation method, Mn loading and promoters (K and Pd) on the physico-chemical properties and phenol catalytic wet oxidation (CWO) activity of the MnCeOx system are addressed. Huge amounts of carbonaceous species at the surface of "spent" catalysts indicate that the CWO of phenol proceeds via a typical heterogeneous path, while the concomitance of catalyst reduction and phenol oxidation signal that surface reaction of adsorbed intermediate(s) with activated oxygen species is the rate determining step (r.d.s'.). Textural and redox properties are then key-requirements of design of improved MnCeOx catalysts for the CWO of phenol.