INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Catalytic Wet Peroxide Oxidation of Phenol using Fe2O3 /Al2O3 systems: Improvement of stability
Autor/es:
CARLA DI LUCA; FERNANDO IVORRA; PAOLA MASSA; ROSA FENOGLIO; FRANCISCO MEDINA CABELLO
Lugar:
Lyon
Reunión:
Congreso; XIth European Congress on Catalysis; 2013
Institución organizadora:
Université de Lyon
Resumen:
Advanced Oxidation Processes (AOPs) are alternative physical-chemistry treatments, involving the generation of strong oxidizing species able to degrade organic compounds [1]. For preliminary tests, phenol is frequently chosen as a model pollutant, due to its high toxicity and resistance to traditional detoxification processes [2]. Different AOPs have been applied to treat wastewaters containing phenol, including the classic Fenton?s reagent. In order to overcome the typical limitations of these conventional homogeneous systems, a variety of solid Fenton-like catalysts were developed for the Catalytic Wet Peroxide Oxidation (CWPO) reactions [2]. Among low-cost materials, the potential of alumina supported systems has been limitedly explored [3-5]. We have studied alumina based systems with low iron contents with promising results. In a previous work, we observed that by means of a thermal treatment at 900 ºC, the stability of the catalysts could be significantly enhanced[5]. In the present work we further investigated the performance of Fe2O3/Al2O3 systems in the CWPO of phenol, at moderate reaction temperatures (50-70 ºC). The objective was to reach higher degradation rates, minimizingthe impact of leaching processes. For this purpose, pelletized catalysts were prepar ed using higher iron loading(5wt% Fe2O3) and differentacid pre-treatments. A relatively concentrated phenol initial charge (5g/L) was selected,which imposes more demanding reaction conditions for the catalyst in order to test the resistance of the iron species to solubilization.