Redox behavior of V/MgO catalyst in H₂S wet oxidation at room temperature

The room temperature wet catalytic oxidation was conducted in a batch reactor with V/MgO catalyst. The XRD study of the catalyst used indicated that V/MgO could not only oxidize H₂S to sulfur selectively, but also prevent the sulfidation of metal oxide effectively at room temperature. The XPS study indicated that the H₂S oxidation with V/MgO could proceed by a redox mechanism (V⁵⁺ ↔ V⁴⁺) and that V³⁺ formation (V⁴⁺ → V³⁺), was responsible for the deactivation of V/MgO.