Wet peroxide oxidation of phenol over Cu-ZSM-5 catalyst in a flow reactor. Kinetics and diffusion study

Preparation, characterization, and application of nano‐FeOx/Al2O3/cordierite monolithic catalysts for heterogeneous dark Fenton reaction

“…8,11,16 Likewise, both the catalyst shape (powdered, pelletized, structured) and the reactor type influence the reaction kinetics and the diffusion phenomena. 36,37 Nevertheless, a comparison with FeO x /Al 2 O 3 powdered catalysts can give some insights about the relative performance of the monolithic catalysts studied in this work. For instance, Bautista et al 11 obtained a TOC reduction of around 30% operating the phenol peroxidation under reaction conditions similar to those used in this work (see collected data in Table S1).…”

“…Although the reaction byproducts were not identified in this work, the brownish coloring of the solution is an indication of the formation of phenol polycondensation products and/or colored quinone-like compounds, in agreement with the observations of other researchers. 8,17,36,38 Also, the variation of the solution pH during the reaction (Fig. 12) can give clues about the formation of other reaction byproducts.…”

“…Restivo et al 34,35 conducted catalytic ozonation tests of organic pollutants using nanocarbons on monoliths. Taran et al 36,37 carried out phenol oxidation tests with hydrogen peroxide using a Cu-ZSM-5 catalyst with various structures (spheres, pellets, monoliths). They concluded that the phenol oxidation reaction at pellets of commercial size is controlled by both internal and external diffusion limitations.…”

“…As far as we know, the application of FeO x / Al 2 O 3 /cordierite monolithic catalysts for the phenol peroxidation reaction is reported here for the first time. In numerous studies, phenol has been employed as a representative molecule of refractory organic compounds, [7][8][9][10][11][15][16][17][21][22][23][36][37][38] since phenol is used in the production of phenolic resins, in the manufacture of nylon and other synthetic fibers, and in the pharmaceutical and cosmetic industries as a potent fungicide, bactericide, antiseptic, and disinfectant, among other applications. The nature of the catalysts was determined by means of several characterization techniques and, on the basis of the results of the catalytic experiments, the potential application of these monolithic catalysts for Fentontype reactions was evaluated.…”

Chemical vapor deposition of CuO on ZSM-5 membrane for catalytic wet peroxide oxidation of phenol in a fixed bed reactor

“…More importantly, the use of metal modied ZSM-5 zeolite membrane/PSSF catalysts in the xed bed can enhance conversion, selectivity and catalyst life due to the high contact efficiencies between the catalyst and ow streams. 25,33 It also eliminates the need for ltration of catalyst particles, especially important in liquid phase systems.…”