Sulfur tolerant NO.sub.x traps highly loaded with sodium or pota

Details Sulfur tolerant NO.sub.x traps highly loaded with sodium or pota Sulfur tolerant NO.sub.x traps highly loaded with sodium or pota

1997-02-07

1999-08-17

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

502330, 4232137, 4232391, 60299, F01N 310, B01D 5394, B01J 2358

Patent

active

059390379

ABSTRACT:
The invention is a nitrogen oxide trap comprising a porous support; and catalysts comprising platinum and either sodium, potassium, or their mixture loaded on the porous support. The sodium, potassium, or sodium/potassium mixture is present in a significantly high loading of at least 30 weight percent, and the platinum comprises 0.2-3 weight percent, based on the weight of the porous support. The trap may be used in an internal combustion engine exhaust gas catalyst system. During lean-burn operation of the engine the trap sorbs nitrogen oxides (NOx) and releases the nitrogen oxides during decreased oxygen concentration in the exhaust gas, the desorbed NOx being converted to N.sub.2 and O.sub.2.

REFERENCES:
patent: 5412945 (1995-05-01), Katoh et
patent: 5547913 (1996-08-01), Muramoto
patent: 5686377 (1997-11-01), Banno
patent: 5753192 (1998-05-01), Dobson

Affiliated with

Also associated with

Rating

Sulfur tolerant NO.sub.x traps highly loaded with sodium or pota does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sulfur tolerant NO.sub.x traps highly loaded with sodium or pota, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sulfur tolerant NO.sub.x traps highly loaded with sodium or pota will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-312788