Method of removing nitrogen oxides using material for absorbing

Details Method of removing nitrogen oxides using material for absorbing Method of removing nitrogen oxides using material for absorbing

1997-03-20

1999-12-14

Langel, Wayne

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232137, 4232132, 95129, B01D 5356

Patent

active

060013192

ABSTRACT:
A nitrogen oxide absorbing material, comprising a hollandite-type complex oxide having main metal elements comprising minimally of aluminum and tin, or zinc and tin, and a method of using that nitrogen oxide absorbing material comprising the steps of contacting the nitrogen oxide absorbing material with a gas containing nitrogen oxides. The method of reducing the adsorbed nitrogen oxides on the nitrogen oxide absorbing material includes the steps of releasing the nitrogen oxides from the nitrogen oxide absorbing material, and of reducing the released nitrogen oxides with a three way catalyst or other nitrogen oxide reducing catalysts.

REFERENCES:
patent: 5362463 (1994-11-01), Stiles
patent: 5412945 (1995-05-01), Katoh
patent: 5433074 (1995-07-01), Seto
patent: 5457958 (1995-10-01), Boegner
Proceedings of International Symposium on Environmental Issues off Ceramics, Selective Reduction of Nitrogen Monoxide by Hollandite type Compounds, by, M. Watanabe et al., Oct., 1994.

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