Trimetallic zeolite catalyst and method of NO.sub.x abatement us

Details Trimetallic zeolite catalyst and method of NO.sub.x abatement us Trimetallic zeolite catalyst and method of NO.sub.x abatement us

1996-08-15

1998-07-07

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232135, B01J 800

Patent

active

057764239

ABSTRACT:
A catalytic material useful for the abatement of NO.sub.X in a lean environment containing a zeolite material having incorporated therein copper, cobalt and iron as catalytically active species. The catalytically active metals are preferably incorporated into the zeolite by ion exchange and precipitation. The catalytic material may typically contain from about 2.0 to about 8.0 percent copper, from about 1.0 to about 4.0 percent iron and from about 0.25 to about 4.0 percent cobalt by weight of the catalytic material, i.e., by weight of the zeolite material plus the catalytic metals incorporated therein. Optionally, the catalytic material may be admixed with a binder and applied as an adherent coating onto a carrier to be placed in a gas stream containing the nitrogen oxides.

REFERENCES:
patent: 5041272 (1991-08-01), Tamura et al.
patent: 5041274 (1991-08-01), Kagi, Sr.
patent: 5254515 (1993-10-01), Imai
Kagawa et al, "Cocation Effect in . . . Copper Ion-Exchanged ZSM-5 Zeolites . . . " Chemistry Letters 1991, pp. 407-410 (no month).
Iwamoto et al, "Enhancement of . . . Copper Ion-Exchanged Y Type Zeolites . . . " 62 Bull.Chem.Soc.Jpn., pp. 583-584 (1989) (no month).
Teraoka et al, "Influence of Cocations . . . Copper Ion-Exchanged ZSM-5 . . . " 12 Catalysis Letters, pp. 361-366 (1992) (no month).

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