Patent ID: 7214350

Claim:
A device for oxidizing carbon particles and for decomposing chemical compounds contained in an exhaust gas stream resulting from internal combustion engines, containing oxygen at temperatures between 150° C. and 350° C. by converting the gas stream into gaseous oxidation products, the device comprising: at least one converter chamber for a catalytic treatment of the gas stream; and a catalyst body provided within said converter chamber with cylindrical profiled carrier matrix profiles designed within said catalyst body with a heat-resistant and thermodynamically stable, integral labyrinth carrier material defining at least a portion of said profiles selected from a group consisting of FeCrVY, FeCrVCe and FeCrVSiY with a plurality of passage channels also provided on said profiles, exhaust gas stream loaded with particles containing carbon flowing through said channels, a plurality of said carrier matrix profiles being arranged essentially in parallel to one another, wherein: said catalyst body includes a stabilizer plate and a module plate held at a spaced location from said stabilizer plate by spacer elements, and a baseplate which holds said cylindrical profiled carrier matrix profiles and closes said catalyst body, said cylindrical profiled carrier matrix profiles being held in position by connecting rods in spacer tubes or other holding elements and form a modular assembly unit which can be pushed into a converter chamber interior space of said converter chamber and can be pulled out of said converter chamber interior space, said catalyst body also includes at least one converter chamber outlet catalyst carrier matrix layer dimensioned corresponding to an inner cross-sectional area of said converter chamber, said converter chamber outlet catalyst carrier matrix layer covering said baseplate and peripheral openings thereof and being formed of a material FeCrV which exerts an oxidation catalytic action on its surface at temperatures below 400° C., in a state coated with CeV at temperatures below 350° C. and in conjunction with a PtCe-coated monolith module at temperatures below 300° C., and has openings, which are dimensioned corresponding to dimensions of solid particle agglomerates of said particles, said converter chamber outlet catalyst carrier matrix layer being arranged in front of said baseplate.