%0 Journal Article
%T Characterization by temperature programmed techniques of spent and acid treated vanadium catalysts
%A Charry
%A Iran David
%A Gonz¨¢lez
%A Lina Mar¨ªa
%A Montes de Correa
%A Consuelo
%J Revista Facultad de Ingenier¨ªa Universidad de Antioquia
%D 2011
%I Scientific Electronic Library Online
%X spent samples of v2o5/sio2-¦Ãal2o3 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.
%K v2o5 catalyst
%K catalyst deactivation
%K vanadium recovery
%K sulfovanadate species
%K temperature-programmed techniques.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-62302011000100004&lng=en&nrm=iso&tlng=en