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Article

Characterization by temperature programmed techniques of spent and acid treated vanadium catalysts

Spent samples of V2O5/SiO2-γAl2O3 catalyst used for H2SO4 production were acid treated to recover vanadium. Fresh, spent, and acid treated samples were characterized by temperature-programmed techniques: TPR-H2, TPO-O2, TPD-NH3 and, TGA-DTA in order to determine the effect of deactivating species o...

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Main Author: Charry Prada, Iran David
Other Authors: González Rodríguez, Lina María, Montes de Correa, Consuelo
Format: Article
Language: eng
Published: Universidad de Antioquia, Facultad de Ingeniería 2011
Subjects:
Online Access: http://hdl.handle.net/10495/5404
Summary:
Spent samples of V2O5/SiO2-γAl2O3 catalyst used for H2SO4 production were acid treated to recover vanadium. Fresh, spent, and acid treated samples were characterized by temperature-programmed techniques: TPR-H2, TPO-O2, TPD-NH3 and, TGA-DTA in order to determine the effect of deactivating species on vanadium recovery. DRX and UV-Vis techniques were used to confirm several signals from the temperature-programmed profiles. The results suggest that vanadium sulfovanadates and oxides in treated samples strongly interact with the support making it difficult to get more than 86% vanadium recovery.