Selective catalytic reduction of N2O
US7438878B2 · kind B2 · utility
2Cited by
9References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 12, 2001 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Dec 15, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A gas stream containing nitrous oxide and ammonia is contacted with a catalyst composition containing a zeolite. N2O is reduced to N2 and 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 Nx treatment may be effectuated in a single process stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.