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The salts of alkali earth metals (Ca and Mg) in fly ash have a deactivation effect on SCR catalyst. In this study, the poisoning effect of Ca and Mg on Mn/TiO 2  catalyst was investigated and explained based on experimental and characterization results of BET, XRD, H 2 -TPR, NH 3 -TPD and XPS. It was found that the deactivation effect of Ca is more obvious than that of Mg. The results showed that the drop of redox ability and Brønsted acidity, and the decrease of active oxygen species led to the decrease of Ca-Ce/TiO 2  and Mg-Ce/TiO 2 .

Influence of alkali earth metals on Ce/TiO2 catalyst for selective catalytic reduction of NO with NH3

Influence of alkali earth metals on Ce/TiO₂ catalyst for selective catalytic reduction of NO with NH₃