Catalyst system and method for the reduction of NOx
US7431905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2005 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Jul 28, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/19
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst system for the reduction of NOx. is provided. The system comprises a catalyst in a first zone comprising a catalyst support, a catalytic metal comprising gallium, and at least one promoting metal selected from the group consisting of silver, gold, vanadium, zinc, tin, bismuth, cobalt, molybdenum, tungsten, indium and mixtures thereof; a catalyst in the second zone comprising a second catalyst support, a second catalytic metal selected from the group consisting of indium, copper, manganese, tungsten, molybdenum, titanium, vanadium, iron, cerium and mixtures thereof The catalyst system further comprises a gas stream comprising an organic reductant. The catalyst system may further comprise a catalyst in a third zone; the catalyst comprising a third catalyst support and a third catalytic metal selected from the group consisting of platinum, palladium, and mixtures thereof. A method for reducing NOx utilizing the catalyst system is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.