| abstract |
PROBLEM TO BE SOLVED: To provide a nitrogen oxide adsorbent, particularly a nitrogen oxide adsorbent suitable for adsorbing and removing low-concentration nitrogen oxides in exhaust gas, and nitrogen in exhaust gas using the adsorbent. A method for efficiently adsorbing and removing oxides is provided. SOLUTION: An adsorbent containing the following A component, B component and C component is used. A component: platinum, gold, ruthenium, At least one selected from rhodium and palladium, and compounds of these metals. B component: manganese, At least one selected from iron, cobalt, nickel, copper, zinc, lead and cerium oxides. Component C: at least one selected from alkaline earth metal compounds. |