| US 7,494,634 B2 | ||
| Reduction of nitrogen oxides using multiple split streams | ||
| Frederic Vitse, Schenectady, N.Y. (US); Dan Hancu, Clifton Park, N.Y. (US); and Benjamin Hale Winkler, Albany, N.Y. (US) | ||
| Assigned to General Electric Company, Niskayuna, N.Y. (US) | ||
| Filed on Jan. 10, 2007, as Appl. No. 11/651,710. | ||
| Prior Publication US 2008/0166283 A1, Jul. 10, 2008 | ||
| Int. Cl. B01D 53/54 (2006.01); B01D 53/56 (2006.01); B01D 53/74 (2006.01); B01D 53/75 (2006.01); B01D 53/86 (2006.01); B01D 53/94 (2006.01); F01N 3/10 (2006.01); F01N 3/18 (2006.01); F01N 3/20 (2006.01) | ||
| U.S. Cl. 423—213.2 [423/213.5; 423/213.7; 423/235; 423/236; 423/237; 423/239.1; 422/168; 422/169; 422/170; 422/171; 422/172; 422/177; 422/180; 422/181; 60/274; 60/282; 60/299; 60/301; 60/324] | 22 Claims |
| 1. A method of reducing nitrogen oxides from an exhaust fluid, the method comprising:
dividing a flow of an exhaust fluid comprising a concentration of nitric oxide into three types of flow-through cells, wherein
the first flow-through cell comprises a catalyst configured to reduce the nitric oxide with a reductant to form a first feedstream
comprising nitrogen containing species, the second flow-through cell comprises a catalyst configured to oxidize nitric oxide
to form a second feedstream comprising nitrogen dioxide, and the third flow-through cell does not change the nitric oxide
concentration and forms a third feedstream comprising nitric oxide;
mixing the first, second, and third feedstreams to form a homogenous mixture; and
flowing the mixture into a catalyst bed configured to convert the nitrogen containing species, nitric oxide, and nitrogen
dioxide to produce a treated exhaust fluid comprising nitrogen gas and water.
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