The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2016
Filed:
Dec. 08, 2012
Meinhard Schwefer, Meschede, DE;
Rolf Siefert, Rheda-Wiedenbrück, DE;
Stefan Pinnow, Elsdorf, DE;
ThyssenKrupp Industrial Solutions AG, Essen, DE;
Abstract
Disclosed herein is a device and method for lowering the content of NOand NO in gases. The device comprises a container having therein two reaction steps connected in series. The first step removes NO(DeNOstage) by reducing NOwith a nitrogen-containing reducing agent. Downstream thereof, the second step removes NO by catalytic decomposition of NO to Nand O(DeNO stage). Each step comprises one or more catalyst beds through which flows gas to be purified. The catalyst bed of the DeNOstage containing zeolites doped with transition metals, including lanthanides. The at least one catalyst bed of the DeNO-stage contains one or more catalytically active compounds of elements selected from groups 5 to 11 of the Periodic Table, but not iron-doped zeolites. A device for introducing a nitrogen-containing reducing agent into the stream of the NOand NO-containing gas is further disposed upstream of the DeNOstage.