Diesel engine exhaust gas-purifying catalyst

Details Diesel engine exhaust gas-purifying catalyst Diesel engine exhaust gas-purifying catalyst

1991-12-24

1993-05-04

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502339, 502325, 502329, 502330, 502328, 502331, 502332, 502303, 502304, 502333, 502334, 4232155, B01J 2106, B01J 2356, B01J 2358, B01J 2360

Patent

active

052082032

ABSTRACT:
There is provided a Diesel engine exhaust gas-purifying catalyst which comprises (1) a catalytic component comprising titania having dispersed and deposited thereon at least one noble metal selected from palladium, platinum and rhodium, and (2) a refractory three dimensional structure as a carrier. This catalyst is excellent in the performance of removal by combustion at low temperature of harmful components such as uncalcined hydrocarbons and carbon monoxide in addition to carbonic fine particles, and moreover has only low ability to oxide sulfur dioxide, whereby formation of sulfates can be inhibited.

REFERENCES:
patent: 4849399 (1989-07-01), Joy, III et al.
patent: 5000929 (1991-03-01), Horiuchi et al.
patent: 5071816 (1991-12-01), Horiuchi et al.
Hunter, et al., "The Effect of an Oxidation Catalyst on the Physical, Chemical, and Biological Character of Diesel Particulate Emissions" Paper 810263, Detroit, Mich., 1981.

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