Catalyst-adsorbent for purification of exhaust gases and method for purification of exhaust gases
US6667018B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst-adsorbent for purification of exhaust gases, including a monolithic carrier and a catalyst-adsorbent layer formed thereon, the catalyst-adsorbent layer including a catalyst for reduction of the carbon monoxide, hydrocarbons and nitrogen oxides emitted from internal combustion engines and an adsorbent for reduction of the hydrocarbons emitted during cold start of the engines. The catalyst is composed mainly of catalyst particles each including a heat-resistant inorganic oxide and at least one noble metal selected from Pt, Pd and Rh, loaded thereon, the catalyst containing at least catalyst particles each comprising a heat-resistant inorganic oxide and 2-30% by weight, based on the oxide, of Pd loaded thereon, the adsorbent comprising adsorbent particles composed mainly of zeolite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.