Photo-Fenton oxidation of acetic acid was carried out on perovskites-based structured catalysts, in the presence or in the absence of low amts. of Pt. Homogeneous photo-Fenton reaction by ferrioxalate complex was also performed. The comparison of homogeneous and heterogeneous photo-Fenton oxidn. indicates that the use of a heterogeneous structured catalyst greatly improves the total org. carbon (TOC) removal and leads to a more effective use of H2O2. The rate of TOC removal during the runtime decreased because of the occurring side H2O2 decompn. to O2 that subtracts the oxidant to the photo-Fenton reaction. Moreover it allows enlarging the pH range of operation without the formation of sludge or significant metal leaching. LaFeO3 and Pt/LaMnO3 resulted the best catalysts for this process in terms of reaction rate.
Structured catalysts for photo-Fenton oxidation of acetic acid.
SANNINO, Diana;VAIANO, VINCENZO;CIAMBELLI, Paolo;
2011
Abstract
Photo-Fenton oxidation of acetic acid was carried out on perovskites-based structured catalysts, in the presence or in the absence of low amts. of Pt. Homogeneous photo-Fenton reaction by ferrioxalate complex was also performed. The comparison of homogeneous and heterogeneous photo-Fenton oxidn. indicates that the use of a heterogeneous structured catalyst greatly improves the total org. carbon (TOC) removal and leads to a more effective use of H2O2. The rate of TOC removal during the runtime decreased because of the occurring side H2O2 decompn. to O2 that subtracts the oxidant to the photo-Fenton reaction. Moreover it allows enlarging the pH range of operation without the formation of sludge or significant metal leaching. LaFeO3 and Pt/LaMnO3 resulted the best catalysts for this process in terms of reaction rate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
