A CATALYTICALLY HIGHLY-ACTIVE, ARSENIC OXIDE RESISTANT V-MO-O PHASE - RESULTS OF STUDYING INTERMEDIATES OF THE DEACTIVATION PROCESS OF V2O5-MOO3-TIO2 (ANATASE) DENOX CATALYSTS

Investigations into the poisoning effect of As2O3 on V2O5-MoO3 mixtures have diverted the development of DeNOx catalysts to a V-Mo-O phase which is dispersed on TiO2 (anatase) and favorably influences both the selectivity (k(NOx) and k(SOx) values) and the lifetime of the catalyst. These advantages over systems which are obtained by formation of a monomolecular dispersion of V2O5 and MoO3 on TiO2 (anatase) are shown by the new catalyst generation (TiO2-Mo-V oxide catalyst), in particular in flue gases containing arsenic oxides downstream of slag tap furnaces.