| abstract |
A device for the additive-free, catalytically induced oxidation of solid carbon particlesnand the decomposition of chemical compounds, which are generated by diesel engines andnother combustion carbon particles. A device (100) for burning exhaust gas particles,ncomprising a converter chamber (50), in which at least one or a large number of porousnstructure catalyst carrier matrix profiles (120) are accommodated. The catalyst carrier matrixnprofiles are mounted in the converter chamber, wherein the converter chamber is provided withncompartments, so that the space between the internal diameter of the catalyst profiles isnconnected to an inlet connection of the converter chamber, and the space around the externalndiameter of the catalyst profiles is connected to an outlet connection into the catalyst chamber.nThe profiles are mounted at the star-shaped gas passages and the compartments, so that gasnparticles can reach the outlet connection from the inlet connection only by passing through thenwalls of the structure of the porous profiles. To induce the activities of an additive-freencatalytic oxidation at low exhaust gas temperatures, it may be advantageous to provide at leastna third opening at the inlet of the device, through which liquid or gaseous media, e.g., NO 2 , O 3 nor H 2 O or auxiliary means are positioned in front of the porous structures. The porousnstructures are made of a catalytically active material in order to catalytically reduce the solidnsoot particles and chemical compounds in a exhaust gas stream, which pass through the devicenfor burning exhaust gas particles, without additives or admixtures. The catalytically activenmaterial used is selected such that it has catalytic action at temperatures below 400°C, npreferably below 350°C and especially below 300°C. The low-temperature regeneration belown250°C by the injection of H 2 O is preferred. |