Selective catalytic reduction of N 2 O

Details Selective catalytic reduction of N 2 O Selective catalytic reduction of N 2 O

2001-03-12

2008-10-21

Johnson, Edward M (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

C423S235000

Reexamination Certificate

active

07438878

ABSTRACT:
A gas stream containing nitrous oxide and ammonia is contacted with a catalyst composition containing a zeolite. N2O is reduced to N2and H2O at low temperatures in a highly efficient manner. Ammonia-mediated reduction of nitrous oxide can be effectuated from gas streams having N2O concentrations as low as 1%. The gas stream may also contact a catalytic composition selective for the reduction of NOx. In this way, N2O and Nxtreatment may be effectuated in a single process stream.

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