Doped catalyst support materials having oxygen storage capacity (OSC) and method of making thereof
US10232348B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2016 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Jun 22, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst support material (D-CZMLA) with oxygen storage capacity corresponds to the formula vD:x(Ce1-wZrwO2):yM:zL:(1-v-x-y-z)Al2O3, wherein w is a molar ratio between 0.1-0.8 and v, x, y, and z are weight ratios, such that v is between 0.005-0.15, x is between 0.05-0.80, and y and z are between 0.001-0.10. M is an interactive promoter for oxygen storage, L is a stabilizer (L) for the Al2O3 support; and D is an oxidizing dopant. The catalyst support material can be incorporated into a wash coat that combines platinum group metals (PGM), an adhesive, and a mixture of (α)RE-Ce—ZrO2+(β)CZMLA+(1−α−β)RE-Al2O3, wherein RE-Ce—ZrO2 is a rare earth element stabilized ceria zirconia having a weight ratio (α) between 0-0.7; CZMLA is the doped catalyst support material having a weight ratio (β) between 0.2-1, such that (α+β)≤1; and RE-Al2O3 is rare earth element stabilized alumina having a weight ratio equal to (1−α−β).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.