A highly efficient and porous catalyst for simultaneous removal of NOx and diesel soot

A highly efficient and porous catalyst (La0.8K0.2Cu0.05Mn0.95O3) for simultaneous removal of nitrogen oxides (NOx) and diesel soot was synthesized and the sample was characterized by XRD, BET, SEM-EDS, XRF, and XPS. The results indicate that this catalyst is perovskite and it possesses the very good characteristics for multiphase catalytic reactions. The catalytic properties were appraised under simulated diesel engine exhaust by temperature programmed reaction (TPR). TPR results indicate that this catalyst is a promising candidate for simultaneous removal of NOx and diesel soot. The maximum NO conversion into N, and the ignition temperature of soot are 54.8% and 260 degrees C, respectively. Comparing with those in previous reports, the comprehensive performance of this catalyst is greatly improved by partial substitution of La with K and Mn with Cu at the same time. (c) 2006 Elsevier B.V. All rights reserved.