Catalyst and process for exhaust purification

Details Catalyst and process for exhaust purification Catalyst and process for exhaust purification

2005-04-12

2005-04-12

Doroshenk, Alexa (Department: 1764)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including solid, extended surface, fluid contact reaction...

C422S168000, C422S177000, C422S180000, C422S211000, C423S210000, C423S212000, C423S213200, C502S325000, C502S326000, C502S334000, C060S272000, C060S282000, C060S299000

Reexamination Certificate

active

06878354

ABSTRACT:
A catalyst for internal combustion engine exhaust purification without frequently switching to a rich burn mode. The catalyst includes a catalyst A containing an NOxabsorbing substance and an NOxreducing catalyst, a catalyst B containing a hydrogen adsorption substance and a hydrogen oxidizing catalyst, an electron conductive substance C, and an ion conductive substance D. Electrons move between the catalyst A and the catalyst B through the electron conductive substance C, ions move through the ion conductive substance D, and an electrochemical reducing reaction and an electrochemical oxidizing reaction respectively occur on the catalyst A and on the catalyst B. Therefore, it is possible to quickly reduce the adsorbed NOxusing the adsorbed hydrogen without depending on the atmosphere.

REFERENCES:
patent: 5473887 (1995-12-01), Takeshima et al.
patent: 5884473 (1999-03-01), Noda et al.
patent: 10-270055 (1998-10-01), None

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