NOx reduction through the use of methane

Details NOx reduction through the use of methane NOx reduction through the use of methane

1993-03-01

1994-11-15

Dees, Carl F.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

422172, 422173, C01B 2104, F01N 310, B01D 5334

Patent

active

053646061

ABSTRACT:
This invention relates to the catalytic reduction of nitrogen monoxide (NO) from highly oxidizing environments. Such catalytic reductions of this type employ the use of small quantities of methane (CH.sub.4) to provide a selective catalytic reduction (SCR) of the NO.

REFERENCES:
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patent: 4830833 (1989-05-01), Shaff
patent: 5149512 (1992-09-01), Li et al.
"Selective Reduction of NO with Propylene on Fe-silicate Catalysts", by E. Kikuchi et al., Chemistry Letters, 1991, pp. 1063-1066.
"Sulfate-promoted Metal Oxide Catalysts for the Selective Reduction of Nitrogen Monoxide by Propane in Oxygen-rich Atmosphere", by H. Y. Hamada et al., Chemistry Letters, 1991, pp. 2179-2182.
"Cu-ZSM-5 Zeolite as Highly Active Catalysts for Removal of Nitrogen Monoxide from Emission of Diesel Engines", by S. Y. Sato, Applied Catalysis, vol. 70, 1991, pp. L1-L5.
"Highly selective Reduction of Nitrogen Oxides with Hydrocarbons over H-form Zeolite Catalysts in Oxygen-Rich Atmospheres", by H. Y. Hamada et al., Applied Catalysis, vol. 64, 1990, pp. L1-L4.
"Selective Reduction of Nitrogen Oxides with Hydrocarbons over Solid Acid Catalysts in Oxygen-Rich Atmospheres", by Y. H. Kintaichi et al., Catalysis Letters, vol. 6, 1990, pp. 239-244.
"Catalytic Removal of Nitrogen Monoxide over Rare Earth Ion-Exchanged Zeolites in the Presence of Propene and Oxygen", by M. Misono, et al., Chemistry Letters, 1991, pp. 1001-1002.

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