Enhanced catalytic activity of Pt/Al2O3 on the CH4 SCR

In this study, we investigated the effect of mixing alpha-Al2O3 and gamma-Al2O3 with a Pt catalyst on CH4 selective catalytic reduction (SCR). Among the prepared catalysts, the Pt/alpha-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/gamma-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/gamma-Al2O3 + Pt/alpha-Al2O3, by mixing alpha-Al2O3 and gamma-Al2O3 with a Pt catalyst. The catalytic activity test confirmed that mixing these catalysts led to enhanced catalytic activity. (C) 2011 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.