A A TiO2 – V2O5 catalysts produced via vapour – deposited titanium.A theoretical and experimetnal study

M. PELUSO, M. DOMÍNGUEZ, M. CENTENO, J. ODRIOZOLA, H.THOMAS, J. SAMBETH

Paris

Congreso; 13 th International Cong.Catalysis; 2004

Different authors have demonstrated that TiV catalysts suffer unfavourable changes after heating, such as anatase-rutile transformation and the partial reduction of V+5 to V+4 and incorporation of the formed V+4 into the rutile lattice. The active phase of these catalysts, generally prepared by supporting vanadia onto a titania support, is the vanadium one. As oxidation reactions are sensitive to the surface vanadia coverage and to the interaction V-OSupport, normally very active and selective catalysts to total oxidation are obtained. The aim of this project is “to build” one solid where Titanium can be deposited over V2O5 and then to find one catalyst with a moderate activity and a high selectivity to partial oxidation products in the methanol oxidation.+5 to V+4 and incorporation of the formed V+4 into the rutile lattice. The active phase of these catalysts, generally prepared by supporting vanadia onto a titania support, is the vanadium one. As oxidation reactions are sensitive to the surface vanadia coverage and to the interaction V-OSupport, normally very active and selective catalysts to total oxidation are obtained. The aim of this project is “to build” one solid where Titanium can be deposited over V2O5 and then to find one catalyst with a moderate activity and a high selectivity to partial oxidation products in the methanol oxidation.