Catalityc soot combustion via earth alkaline doped ceria

The catalytic activity of cerium oxide towards the combustion of carbonaceous materials at low temperature has been widely investigated [1,2], mainly in the area of diesel soot emission control. Catalysts suitable for promoting low temperature combustion of carbonaceous materials may indeed be applied in the traps designed for the abatement of diesel particulate, which is one of the most harmful pollutants emitted by diesel engines. In literature it is also well know as the CeO2 decrease its catalytic property in a relatively short time of use [3]. To stabilize the catalyst during a longer period towards solid carbonaceous materials oxidation, the cubic lattice ceria was doped by earth alkaline metals like: Ba, Ca, Sr, Mg [4]. The work explains the role of earth alkaline doping into the basic material lattice with a XRD and BET analysis. The catalytic activity of the doped catalysts, before and after a specific ageing protocol, was investigated with the TPC test and the activation energy was calculated for each reaction using the Starink method after DSC runs at different heating rate.