Novel catalysts and catalytic technologies for N2O removal from industrialemissions containing O-2, H2O and SO2

The catalytic behavior and some aspects of the development of novel catalys ts for N2O decomposition (rhodium-on-zirconia based catalysts) or selective reduction with propane (Fe/ZSM-5 type catalysts) in the presence of the ty pical gas phase components of industrial emissions containing N2O in concen trations below 0.1% are discussed. In particular: (i) the possibility to im prove the catalytic reactivity of rhodium-on-zirconia based catalysts by mo dification of the zirconia support with lanthanide ions or other dopants; ( ii) the stability of the catalytic behavior of these samples in the presenc e or absence of SO2; and (iii) some characteristics and the stability behav ior of Fe/ZSM-5 catalysts in the presence of SO2 for the reduction of N2O w ith propane/O-2 are reported. The catalytic technologies of decomposition a nd selective reduction of N2O are compared in terms of economics of the pro cesses and type of emissions for which they are preferably suited. (C) 2000 Elsevier Science Ltd. All rights reserved.