NO.sub.x reduction catalyst for internal combustion engine emission control
US4006105A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1974 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Nov 18, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2450/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for reducing NO.sub.x gases found in the exhaust stream of the internal combustion engine is provided which includes an internal combustion engine having associated therewith a means for supplying fuel and oxygen to the engine, a manifold system for directing or channeling the exhaust gases from the engine, and an NO.sub.x reducing catalyst assembly communicating with the manifold which includes a housing having an NO.sub.x reducing catalytic structure of apertured thin metal foil positioned therein which comprises a durable, chromium containing corrosion resistant metal substrate having bonded thereto an effective amount of a NO.sub.x reducing catalyst selected from the group consisting of iron, nickel, cobalt, copper, manganese and mixtures thereof. In addition, an article composed of a catalytic material for reducing the oxides of nitrogen in exhaust gases from an internal combustion engine is also provided. The article includes a self-supporting catalytic structure in the form of an apertured, thin metal foil having a ratio of low mass to high surface area. In its preferred form, the foil is an expanded metal foil, and the article is formed by tightly winding the foil …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.