Honeycomb catalysts for clean-up of diesel exhausts based upon the anodic-spark oxidized aluminum foil

• Published in: Catalysis today 1999-11, Vol.53 (4), p.639-646
• Main Authors: Tikhov, S.F, Chernykh, G.V, Sadykov, V.A, Salanov, A.N, Alikina, G.M, Tsybulya, S.V, Lysov, V.F
• Format: Article
• Language: English
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/S0920-5861(99)00160-1

The technology of the aluminum foil anodic spark oxidation in the water-based electrolytes has been applied to form strongly adhering protective alumina layer at the surface. Basic features of the oxidation were studied by SEM and XRD. Secondary supports, promoters and modifiers including rare-earth elements were used to increase the thermal stability of these composites up to 900°C. These materials were assembled as thin wall honeycomb supports loaded with a number of active components. The catalysts were tested in the reactions of CO and CH x oxidation, NO x selective reduction by hydrocarbons and demonstrated a high performance and a low pressure drop at high space velocities. City diesel buses field tests of converters equipped with those catalysts demonstrated their high and stable performance in clean-up of exhausts from SOF, CO, gaseous hydrocarbons and NO x .