Catalyst for treating combustion exhaust gas

Details Catalyst for treating combustion exhaust gas Catalyst for treating combustion exhaust gas

1973-05-18

1976-05-11

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

4232135, B01J 2104, B01J 2376

Patent

active

039561895

ABSTRACT:
The exhaust gas discharged from an engine such as an internal combustion engine or the like is treated to convert harmful or noxious pollutant components such as nitrogen oxides, carbon monoxide and unburned hydrocarbons to innocuous compounds, by contacting the exhaust gas with two stages in series of a catalyst composition containing 8% to 20% by weight of copper as equivalent copper oxide, 1% to 5% by weight of cobalt as equivalent cobalt oxide, and 0.5% to 3% by weight of manganese as equivalent manganese dioxide, deposited on particles of transitional alumina having a surface area in the range of 200 to 400 square meters per gram. The copper and cobalt are at least partially present in the form of reduced oxides, and the catalyst may also contain 1% to 5% nickel as equivalent nickel oxide. Air is injected into the partially reacted exhaust gas between stages, so that a reduction of nitrogen oxides takes place in the first catalytic stage or bed, and oxidation of carbon monoxide and hydrocarbons to innocuous compounds such as carbon dioxide and water vapor takes place in the second catalytic stage or bed.

REFERENCES:
patent: 3228746 (1966-01-01), Howk et al.
patent: 3310366 (1967-03-01), Koepernik
patent: 3433581 (1969-03-01), Stephens et al.
patent: 3699683 (1972-10-01), Tourtellotte et al.
patent: 3737396 (1973-06-01), Negra et al.

Affiliated with

Also associated with

Rating

Catalyst for treating combustion exhaust gas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalyst for treating combustion exhaust gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst for treating combustion exhaust gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1301603