Method for removal of nitrogen oxides

Details Method for removal of nitrogen oxides Method for removal of nitrogen oxides

1996-06-10

1997-12-09

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01J 800

Patent

active

056957289

ABSTRACT:
A method for removing nitrogen oxides from an oxygen-rich exhaust gas containing nitrogen oxides and hydrocarbons comprising bringing the oxygen-rich exhaust gas into contact with a catalyst comprising (1)(i) a zeolite containing an apatite compound and having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 15 and (ii) at least one active metal or (2)(ii) a zeolite containing an apatite compound and having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 15, (ii) an alkaline earth metal and (iii) at least one active metal.

REFERENCES:
patent: 5143707 (1992-09-01), Beck et al.
patent: 5254322 (1993-10-01), Bhore et al.
patent: 5310548 (1994-05-01), Tsuru et al.

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