Selective non-catalytic reduction (SNCR) of toxic gaseous effluents
US7575648B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2000 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Apr 7, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2251/206
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Selective non-catalytic reducing (SNCR) compounds, independent of the gas generant composition, reduce the toxicity of effluent gases produced by combustion of nonazide gas generating compositions used to inflate vehicle occupant restraint systems. It is believed that reaction of the NH2 radical (formed from the SNCR compound) with NO in the combustion gas forms N2 thereby decreasing the concentration of toxic nitrogen oxides therein. Heterogeneous placement of the reducing compound proximate to the gas generant bed within a gas generator ensures intimate contact with the combustion gases, and yet still provides a noninvasive method of toxic gas reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.