Patent · US Expired

Method for operating a purification device, a purification device and use of the same

US6004520A · kind A · utility

5Cited by

8References

12Claims

0Family size

Assignee

Daimler-Benz AG · DE

Inventors

Martin Hartweg · Erbach, DE
Rolf-Dirc Roitzheim · Blaustein, DE
Andrea Seibold · Blaustein, DE
Leonhard Walz · Rastatt, DE
Thomas Fetzer · Speyer, DE
Bernd Morsbach · Ludwigshafen, DE

Key dates

Filing date	Dec 12, 1996
Grant date	Dec 21, 1999
Priority date	—
Expiry date	Dec 12, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a method for operating a purification device, to a purification device and to the use of same. To reduce the emission of pollutants, a filter body through which a fluid can flow and comprising a catalyst, is exposed to a stream of gas which is to be purified. Before the gas enters the catalyst, a reducing agent is added in the flow direction of the gas, and after a certain treatment point, during which the gas, which is to be purified, is flowing in the catalyst, reducing agent is added once more to the flowing gas by a feeding mechanism and contact with the catalyst is maintained.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.