Correlation on the characteristics and performance of V/Ti-based SO₂ oxidation catalysts prepared by a mechanochemical method

The reaction characteristics of the SO₂ oxidation catalyst by the catalyst preparation method were analyzed by investigating the catalyst properties on the TiO₂ support using a vanadium-alkali (K) compound containing the catalyst. The slurry mix method and the dry ball milling method were used for the production of the catalyst. In this process, the difference in interaction between the active material (V) and the support (TiO₂) has been confirmed. Especially, the high proportion of non-stoichiometric species of the initial catalyst reflects the high interaction between vanadium and TiO₂. Therefore, an increase in non-stoichiometric species such as V⁴⁺ indicates an increase in the interaction between TiO₂ and V₂O₅. In particular, the interaction between the support-active material improves the transfer of SO₂ adsorbed on the support TiO₂ to the active material (V₂O₅). Therefore, it induces the production of a high proportion of the active substance (V^VO)₂O(SO₄)₄⁴⁻ and consequently increases the SO₂ oxidation performance.