公开(公告)号：US09238196B2

公开(公告)日：2016-01-19

申请号：US14365949

申请日：2012-12-08

申请人： Meinhard Schwefer ,  Rolf Siefert ,  Stefan Pinnow

发明人： Meinhard Schwefer ,  Rolf Siefert ,  Stefan Pinnow

IPC分类号： B01D53/56 ,  B01D53/86

CPC分类号： B01D53/869 ,  B01D53/8628 ,  B01D53/8631 ,  B01D53/8696 ,  B01D2255/1025 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/20753 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/9202 ,  B01D2257/402 ,  B01D2257/404 ,  Y02C20/10

摘要： Disclosed herein is a device and method for lowering the content of NOX and N2O in gases. The device comprises a container having therein two reaction steps connected in series. The first step removes NOX (DeNOX stage) by reducing NOX with a nitrogen-containing reducing agent. Downstream thereof, the second step removes N2O by catalytic decomposition of N2O to N2 and O2 (DeN2O stage). Each step comprises one or more catalyst beds through which flows gas to be purified. The catalyst bed of the DeNOX stage containing zeolites doped with transition metals, including lanthanides. The at least one catalyst bed of the DeN2O-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 NOX and N2O-containing gas is further disposed upstream of the DeNOX stage.

摘要翻译： 本文公开了一种用于降低气体中的NO x和N 2 O的含量的装置和方法。 该装置包括其中具有串联连接的两个反应步骤的容器。 第一步通过用含氮还原剂还原NO x来除去NOX（脱硝阶段）。 在其下游，第二步通过将N 2 O催化分解成N 2和O 2（DeN 2 O阶段）来除去N 2 O。 每个步骤包括一个或多个催化剂床，待净化的气体流过该催化剂床。 DeNOX阶段的催化剂床含有掺杂过渡金属的沸石，包括镧系元素。 DeN2O阶段的至少一个催化剂床含有选自元素周期表第5至11族的元素的一种或多种催化活性化合物，但不包括掺铁沸石。 用于将含氮还原剂引入含NO x和含N 2 O的气体流中的装置进一步设置在DeNOX级的上游。

公开(公告)号：US20140363359A1

公开(公告)日：2014-12-11

申请号：US14365949

申请日：2012-12-08

申请人： Meinhard Schwefer ,  Rolf Siefert ,  Stefan Pinnow

发明人： Meinhard Schwefer ,  Rolf Siefert ,  Stefan Pinnow

IPC分类号： B01D53/86

CPC分类号： B01D53/869 ,  B01D53/8628 ,  B01D53/8631 ,  B01D53/8696 ,  B01D2255/1025 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/20753 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/9202 ,  B01D2257/402 ,  B01D2257/404 ,  Y02C20/10

摘要： A device and a method are described for lowering the content of NOx and N2O in gases. The device comprises: A) a container (1) and, arranged therein, B) two reaction steps connected one after the other for removing NOx (DeNOx stage) by reducing NOx with a nitrogen-containing reducing agent and, downstream thereof, for removing N2O by catalytic decomposition of N2O to N2 and O2 (DeN2O stage), which each consist of one or more catalyst beds (7, 8) and through which the gas that is to be purified flows, wherein C) the at least one catalyst bed of the DeNOx stage (7) contains a catalyst for reducing NOx with nitrogen-containing reducing agents which catalyst contains zeolites doped with transition metals, including the lanthanides, D) the at least one catalyst bed of the DeN2O-stage (8) contains a catalyst for decomposing N2O into N2 and O2, which contains one or more catalytically active compounds of elements selected from groups 5 to 11 of the Periodic Table of the Elements with the exception of iron-doped zeolites, and E), upstream of the DeNOx stage (7), a device for introducing a nitrogen-containing reducing agent into the stream of the NOx and N2O-containing gas is provided. The combination used according to the invention of catalysts permits a very simple structure and a very economic operation of the reactor.

摘要翻译： 描述了用于降低气体中的NOx和N 2 O的含量的装置和方法。 该装置包括：A）一个容器（1），其中布置有B）两个反应步骤，一个接一个地连接，用于通过用含氮还原剂还原NO x，除去NO x（脱硝阶段） N 2 O通过N 2 O催化分解成N 2和O 2（DeN 2 O阶段），其各自由一个或多个催化剂床（7,8）组成，待净化的气体通过其流过，其中C）至少一个催化剂床 的脱硝阶段（7）含有用含氮还原剂还原NOx的催化剂，该催化剂含有掺杂有过渡金属的沸石，包括镧系元素，D）DeN2O级（8）的至少一个催化剂床含有 用于将N 2 O分解成N 2和O 2的催化剂，其含有一种或多种选自元素周期表第5至11族的元素的催化活性化合物，除铁掺杂沸石外，E）在DeNOx级上游 （7），一个装置 提供含氮还原剂到NOx和含N 2 O的气体流中。 根据本发明的催化剂使用的组合物允许反应器的非常简单的结构和非常经济的操作。