Deactivation of Mn/TiO2 catalyst for NH3-SCR reaction: effect of phosphorous

摘要

The deactivation mechanism of phosphorous on a Mn/TiO _(2) catalyst for selective catalytic reduction of NO with NH _(3) was investigated in this study. It was found that the NH _(3) -SCR reaction over the Mn/TiO _(2) catalyst obeyed the Langmuir–Hinshelwood mechanism. From the characterization results, it could be found the addition of phosphorous on the Mn/TiO _(2) catalyst would decrease its reducibility and inhibit the adsorption of chemisorbed oxygen and NO _( x ) species on its surface. As a result, the P-doped Mn/TiO _(2) catalyst was deactivated.