Performance Enhancement of a Platinum-Containing Catalyst via Exhaust Gas Hydrogen Enrichment
Patents
| Language: |
Английский |
| Type: |
Patent request |
| Number |
WO 2022055855 A1 |
| Request number: |
PCT/US2021/049246 |
| Request date: |
Sep 7, 2021 |
| patent.field.start_date: |
|
| Registration date: |
|
| patent.field.request_publication_date: |
Mar 17, 2022 |
The disclosure provides a platinum-containing three-way conversion (TWC) catalyst, and a system for treating an exhaust gas stream from a gasoline engine using the TWC catalyst. The system is configured to introduce controlled quantities of hydrogen gas into the exhaust gas stream upstream of the platinum-containing TWC catalyst article during a cold-start period. Further provided are related methods of treating such exhaust streams. Such systems and methods are useful in reducing a level of one or more of hydrocarbons, carbon monoxide, and nitrogen oxide in a gaseous exhaust stream from a gasoline engine.