Method of decomposing nitrogen dioxide
US8092767B2 · kind B2 · utility
2Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2004 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Oct 13, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/9155
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of decomposing nitrogen dioxide to nitrogen monoxide in an exhaust gas of a lean-burn internal combustion engine, such as a diesel engine, comprises adjusting the C1 hydrocarbon:nitrogen oxides (C1 HC:NOx) ratio of the exhaust gas to from 0.1 to 2 and contacting this exhaust gas mixture with a particulate acidic refractory oxide selected from the group consisting of zeolites, tungsten-doped titania, silica-titania, zirconia-titania, gamma-alumina, amorphous silica-alumina and mixtures of any two or more thereof and passing the effluent gas to atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.