Method for reducing the nitrogen oxide concentration in gases,申请号US20060913450-传众专利搜索

Method for reducing the nitrogen oxide concentration in gases

申请公布号：US7744839(B2)

申请号：US20060913450

申请日期：2006.04.27

申请公布日期：2010.06.29

申请人：

UHDE GMBH

发明人：SCHWEFER MEINHARD;SIEFERT ROLF;GROVES MICHAEL

分类号：B01D53/56

主分类号：B01D53/56

摘要：The method comprises passing an N2O- and NOx-containing gas over a sequence of two catalyst beds, adding reducing agents for NOx and for N2O between the catalyst beds in such an amount that not only NOx but also a predetermined proportion of N2O is reduced. The reaction conditions are set so that the N2O content of the gas is reduced by not more than 95%, based on the N2O content at the entrance of the first catalyst bed, by decomposition to nitrogen and oxygen in the first catalyst bed and that not only chemical reduction of NOx but also chemical reduction of N2O occurs in the second catalyst bed so that the N2O content of the gas is reduced by at least 50%, based on the N2O content at the entrance of the second catalyst bed.