| 摘要 |
PROBLEM TO BE SOLVED: To provide a long life exhaust gas purifying apparatus capable of preventing the deposition of a fine particulate material such as soot or the poisoning of a catalyst due to sulfur oxides in the nitrogen oxides removing catalyst provided in a nitrogen oxides removing apparatus. SOLUTION: The exhaust gas purifying a apparatus is provided with a fine particulate material removing with 10 and a sulfur oxides removing unit 20 in series on the upstream side and a nitrogen oxides removing unit 30 on the downstream side in exhaust gas passages 2a-2d and the unit 30 is provided with the nitrogen oxides removing catalyst 23 composed of a brown milarite type multiple oxide constituted of 2 kinds of elements A and B and expressed by one of general formulas, A3B4O9 and A2B2O5 and noble metal particles 32b containing at least one kind of Ru, Rh, Pd, Ir Pt and Au, which are dispersed and arranged on the brown miralite type multiple oxide. |
