Patent ID: 6602820
Filing Date: 2003-08-05
Classification: B01D,B01J

Abstract:
A method for producing a nitrogen oxide storage material, which contains at least one storage component in the form of particles of an oxide, carbonate or hydroxide of an element selected from the group consisting of magnesium, strontium, barium, lanthanum and cerium on a support material selected from the group consisting of doped cerium oxide, cerium/zirconium mixed oxide, aluminum oxide and mixtures of these, comprising suspending the support material in an aqueous solution of a precursor of the storage component and a solvent to form a suspension, introducing the suspension into a hot gas stream, the temperature of the hot gas stream is adjusted to between 700 and 1100Â° C. so that during a residence time of the suspension in the hot gas stream of less than one minute the solvent evaporates, thermally breaking down the precursor of the storage component and converting to the storage component before separating the storage material from the stream of hot gas.