title: Investigation of the catalytic wet peroxide oxidation of phenol over different types of Cu/ZSM-5 catalyst.
abstract: In this work oxidation of phenol with hydrogen peroxide on Cu/ZSM-5 catalysts was studied. The catalysts samples were prepared by two different methods: by ionic exchange from the protonic form of commercial ZSM-5 zeolite, and by direct hydrothermal synthesis. Characterization of the catalysts extends to X-ray diffraction (XRD), while the adsorption techniques were used for the measurement of the specific surface area. The catalytic tests were carried out in a stainless steel Parr reactor in batch operation mode at the atmospheric pressure and the temperature range from 50 to 80 degrees C. The mass ratio of the active metal component on the zeolite was in the range of 1.62-3.24 wt.%. for catalyst prepared by direct hydrothermal synthesis and 2.23-3.52 wt.% for catalyst prepared by ion exchange method. The initial concentration of phenol and hydrogen peroxide was 0.01 and 0.1 mol dm(-3), respectively. The influence of different methods of Cu/ZSM-5 preparation on their catalytic performance was monitored in terms of phenol conversion and degree of metal leached into aqueous solution.
authors.affiliation: Faculty of Chemical Engineering and Technology, University of Zagreb, Croatia.
authors.forename: K Maduna
authors.initials: KM
authors.lastname: Valkaj
authors.forename: A
authors.initials: A
authors.lastname: Katovic
authors.forename: S
authors.initials: S
authors.lastname: Zrncević
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D006358:Hot Temperature; D006861:Hydrogen Peroxide / Q000737:chemistry; D007474:Ion Exchange; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D017641:Zeolites; D019800:Phenol; D003300:Copper; D006861:Hydrogen Peroxide