Process for reducing NO2 from combustion system exhaust
US8800270B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2007 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Sep 11, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2240/28
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust system for treating an exhaust gas composition having NO2 in a first NO2 concentration. The exhaust system includes a first catalyst that contacts a first portion of the exhaust gas composition converting it into a first oxidized exhaust mixture that includes NO2 in a second NO2 concentration that is greater than the first NO2 concentration. The system further includes a bypass that receives a second portion of the exhaust gas composition and a recombination section positioned downstream of the first catalyst. The first oxidized exhaust mixture is combined with the second portion of the exhaust gas composition to produce a first combined exhaust gas mixture. A second catalyst converts the first combined exhaust gas mixture to a second combined exhaust gas mixture having a third NO2 concentration that is less than the second NO2 concentration. The method used by the exhaust system is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.