Catalyst for exhaust gas purification, process for producing the same, and method of purifying exhaust gas
US6806225B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2000 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Dec 4, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An NOx storage member including at least one member selected from the group consisting of alkali metals, alkaline-earth metals and rare-earth elements, and at least one noble metal selected from the group consisting of Pt, Pd and Rh are loaded on a support including a porous oxide including TiO2 at least and ZrO2 on which Rh is loaded in advance.H2, which is generated by Rh/ZrO2, inhibits the sulfur poisoning, and the support, which includes TiO2 at least, secures the initial NOx purifying capability, thereby further inhibiting the sulfur poisoning. Accordingly, it is possible to inhibit the NOx storage member from the sulfur poisoning, and to maintain a high NOx conversion even after a durability test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.