| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing a nitrogen oxide-occluding material and the nitrogen oxide-occluding material obtained by the same. SOLUTION: The nitrogen oxide-occluding material is constituted of a carrier material selected from the group of a doped cerium oxide, cerium/zircon-mixed oxides and aluminum oxide or mixtures thereof and at least one particulate occluding component of oxides, carbonates or hydroxides of elements of magnesium, strontium, barium, lanthanum and cerium, each being loaded on the carrier material. The method of producing the nitrogen oxide-occluding material comprises suspending a carrier material in an aqueous solution containing a precursor of an occluding component, then introducing the suspension into a hot gas flow and controlling the distribution of the temperature of the hot gas flow so that a solvent of the suspension is allowed to evaporate for a residence time shorter than 1 min in the hot gas flow, the precursor of the occluding component is decomposed by heat and converted into the occluding component, and the occluding material thus formed is separated from the hot gas flow. |
