Method for simultaneously abating nitric oxides and nitrous...

Details Method for simultaneously abating nitric oxides and nitrous... Method for simultaneously abating nitric oxides and nitrous...

2005-05-10

2005-05-10

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

C502S066000, C502S067000

Reexamination Certificate

active

06890501

ABSTRACT:
The invention concerns a method for purifying flue gases before they are released into the atmosphere of their nitrogen oxides N2O and NOxby reaction with ammonia by causing them to circulate at temperatures between 200 and 600° C. on a catalyst based on beta-zeolite loaded with iron. The invention is particularly useful for treating tail gases from factories producing nitric acid.

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Higgins, J.B., Zeolites, vol. 8, pp. 446-452, 1998.
Meier, W.M. et al., Zeolites, vol. 12, pp. 459-654, 1992.

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