公开(公告)号：BG108046A

公开(公告)日：2005-04-30

申请号：BG10804603

申请日：2003-07-31

Applicant: STICHTING ENERGIE

Inventor： VAN DEN BRINK RUDOLF ,  PELS JAN

IPC: B01D53/86

Abstract: The invention relates to a method for the simultaneous removal of nitrogen oxides and laughing gas stream containing nitrogen oxides and laughing gas, wherein a first catalyst that contains cobalt and, as support, an inorganic metal oxide, and a second catalyst that contains iron and, as support, an inorganic metal oxide, are used. In particular the method is carried out in such a way that (a) the gas stream containing nitrogen oxides and laughing gas is reacted with a reducing gas, the reducing gas comprising a saturated hydrocarbon, in the presence of the first catalyst, and (b) the gaseous product from step (a) is reacted with a reducing gas, the reducing gas comprising a saturated hydrocarbon, in presence of a second catalyst. The catalyst system can be used for the treatment of off-gases from a nitric acid plant.