Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1996-10-11
1999-05-25
Caldarola, Glenn
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502327, 502328, 502525, 4232391, B01J 2332
Patent
active
059069589
ABSTRACT:
A catalyst for purifying exhaust gases of an automobile engine including a carrier coprecipitated with a material absorbing oxides of nitrogen (NO.sub.x) and an active noble metal wherein the material absorbing oxides of nitrogen is at least one of barium manganese oxide (BaMnO.sub.3) and calcium manganese oxide (CaMnO.sub.3). The carrier coprecipitated with BaMnO.sub.3 or CaMnO.sub.3 shows superior capacity for absorbing oxides of nitrogen. Consequently, a catalyst according to the present invention can effectively purify engine exhaust, even in a lean burn environment.
REFERENCES:
patent: 4151123 (1979-04-01), McCann, III
patent: 5128305 (1992-07-01), Yoshimoto et al.
Naoto, et al. "No.sub.x Storage Reduction Type Catalyst for Lean Burn Engine (1)", 71th CATSJ Meeting Abstracts No. D3, vol. 37, 1995, pp. 98-99, with translation.
Naoki, et al. "No.sub.x Storage Reduction Type Catalyst for Lean Burn, Engine (2)", 71th CATSJ Meeting Abstracts No. D3, vol. 37, 1995, pp. 100-101, with translation.
Pak Chan-ho
Park Sang-cheol
Bullock In Suk
Caldarola Glenn
Samsung Electro-Mechanics Co. Ltd.
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