Enhanced catalytic activity of Pt/Al2O3 on the CH4 SCR

In this study, we investigated the effect of mixing α-Al₂O₃ and γ-Al₂O₃ with a Pt catalyst on CH₄ selective catalytic reduction (SCR). Among the prepared catalysts, the Pt/α-Al₂O₃ catalyst was found to have the lowest catalytic activity, but the best adsorption characteristics for CH₄, which was used as the reductant. In contrast, the Pt/γ-Al₂O₃ catalyst was found to exhibit relatively high catalytic activity and moderate adsorption characteristics. To simultaneously enhance the catalytic activity and CH₄ adsorption characteristics, we developed a new catalyst, Pt/γ-Al₂O₃ + Pt/α-Al₂O₃, by mixing α-Al₂O₃ and γ-Al₂O₃ with a Pt catalyst. The catalytic activity test confirmed that mixing these catalysts led to enhanced catalytic activity.