Denitrification method

Details Denitrification method Denitrification method

2003-03-21

2008-07-01

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

C423S239200

Reexamination Certificate

active

07393512

ABSTRACT:
A process for reducing the content of NOxand N2O in gases, in particular in process gases and offgases, which comprises the measures: a) addition of at least one nitrogen-containing reducing agent to the NOx- and N2O-containing gas in at least the amount required for complete reduction of the NOx; b) addition of a hydrocarbon, of carbon monoxide, of hydrogen, or of a mixture of one or more of these gases to the NOx- and N2O-containing gas for the reduction of the N2O; and c) introduction of the gas mixture into at least one reaction zone at temperatures of up to 450° C., which contains one or more iron-laden zeolites. The process can be used, in particular, in nitric acid production, for offgases from power stations or for gas turbines.

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Kameoka, S. et al, “Selective catalytic reduction of N2O with methane in the presence of excess oxygen over Fe-BEA zeolite” Chem. Commun.: 745-746 (2000).

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