Process and catalyst for decomposing oxides of nitrogen

Details Process and catalyst for decomposing oxides of nitrogen Process and catalyst for decomposing oxides of nitrogen

1997-06-16

1998-04-28

Jones, Deborah

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423235, C01B 2100

Patent

active

057441138

ABSTRACT:
In order to achieve a high degree of conversion, oxides of nitrogen are contacted with a catalyst containing an aluminum silicate having a three-sheet structure as a catalytically active component at a temperature between 100.degree. C. and 700.degree. C. With this type of catalyst, the decomposition of the oxides of nitrogen proceeds without the presence of a reducing agent. Additionally, the degree of decomposition for the oxides of nitrogen is not adversely affected by the oxygen present in the flue gas. Degrees of decomposition greater than 60% were achieved with this catalyst in the temperature range between 200.degree. C. and 600.degree. C. The catalysts of the invention can replace the previous catalysts, which use a reducing agent, for decreasing the amount of oxides of nitrogen in waste gases, for example in flue gas and exhaust gas purification in power stations and combustion engines, respectively.

REFERENCES:
patent: 3901826 (1975-08-01), Hofstadt et al.
patent: 4001028 (1977-01-01), Frost et al.
patent: 4621070 (1986-11-01), Pinnavia et al.
patent: 4692425 (1987-09-01), Schneider et al.
patent: 4719192 (1988-01-01), Schneider et al.
patent: 4722918 (1988-02-01), Schneider et al.
patent: 4749808 (1988-06-01), Ballantine et al.
patent: 4786484 (1988-11-01), Nelson
patent: 4806718 (1989-02-01), Seaborne et al.
patent: 4869890 (1989-09-01), Adams et al.
patent: 4880378 (1989-11-01), Hums
patent: 4995964 (1991-02-01), Gortsena et al.
patent: 5078981 (1992-01-01), Kagawa et al.
patent: 5089458 (1992-02-01), Breukelaar et al.
patent: 5110363 (1992-05-01), Clarke et al.
patent: 5137703 (1992-08-01), Lichtin et al.
patent: 5234631 (1993-08-01), Kakuta et al.
Chemistry Letters 1988, pp. 1796-1801, "Decomposition of Nitric Oxide over Y-Ba-Cu-O Mixed Oxide Catalysts".
Chemistry Letters 1989, pp. 213-216, "Excessively Copper Iron-exchanged ZSM-5 Zeolites as Highly . . . ".
Chemistry Letters 1990, pp. 1-4, "Catalytic Activity of Perovskite-Type xides for the Direct Decomposit . . . ".
Elsevier Science Publishers B.V. Publ. Catalysis Today 1991, pp. 57-71, "Removal of Nitrogen Monoxide . . . ".
Elsevier Science Publishers B.V. Publ. Appl. Catalysis A:General 85 (1992) pp. 129-133, "Catalytic decomp . . . ".

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